• Get 30% off the first 3 months with code HIDE30

    Offer valid until 9/23! If you have an annual subscription on Sniper's Hide, subscribe below and you'll be refunded the difference.

    Subscribe
  • Having trouble using the site?

    Contact support

Backup generators - I've used them for decades. My take..

eastexsteve

Gunny Sergeant
Full Member
Minuteman
Nov 18, 2018
636
627
NE Texas
I live in rural NE Texas, and we experience power outages often. Some last for days. This year, we've been hammered by bad weather, and this last round is the 12th time I've been on generator power this year, and it's only the first of June. I've played the "generator game" for decades, starting off with one that I thought would be just good enough to keep me going, running the bare minimum appliances until the power came back on. This was torture, and a big mistake. I have a barn full of generators that I no longer use.

In my opinion, most people make bad decisions when it comes to buying a backup generator. They think small, and short run times. The truth is, here in Texas, you need one big enough to power your whole house, including air conditioning and heating. Trust me, your wife and kids won't take kindly to living like a cave man during a power outage when they find out there is something better. Just ballparking, but for a 2,000 sqft house with a family of four, you are talking at least a 12KW - 13KW running watt (not surge watt) generator. If you want to stay married and keep your kids from running away from home, don't think about anything smaller. I'm also assuming here that you have a VERY energy efficient house with all LED lights etc.

And, you want it fuel efficient enough to run all day on a tank of fuel. Also, you want one built to go extended run times. Most of these smaller camping or job site generators won't cut it, since they won't run very long under a load between fueling, and require oil changes every 50 hours. You're not powering a tent or a shade tree mechanics session. You are powering your house, and you may have to do it for many days.

Where propane/natural gas generators burn very clean, and propane stores forever, they are VERY inefficient. My brother found out the hard way this year in Houston when he lost power for six days. Those 5 gallon propane cylinders he used to power his 12KW dual-fuel generator only lasted about four hours. And, by day three, they were really hard to find. So much so, that he had to switch to gasoline after spending $800 on propane for three days and then not being able to find any refills. Under a SHTF scenario, natural gas might not be that much better. Here in Texas during the "big freeze" a few years ago, many people lost natural gas pressure!

Gasoline is much more fuel efficient. I've stored ethanol-free treated gas in large quantities for almost three years. However, diesel is the best. It's the most fuel efficient. Modern day diesel generators are incredibly fuel efficient, and this last round I was running on treated diesel that I had in storage over five years.

With the world like it is, and getting worse, you need to consider a properly-sized backup generator. Things like fuel, fuel storage, and fuel availability in case of a SHTF scenario should be seriously considered. I know some of you are saying: "Oh, but I can keep the fridge, TV and a few lights running with my 2 - 5K watt Brand X and 300 ft of extension cords.." I've been there and done that many times. It SUCKS!

It's not about "getting by." It's about keeping your family calm and comfortable during an emergency. If I had just bought what I have now instead of spending money on a barn full of "just getting by", I would be thousands of dollars ahead of the game. So, before you go plop down a roll of cash on that new rifle or bass boat, you might want to consider what could benefit you more in the long run. If you're curious, here's what I ended up with a few years ago (linked below), and I've never looked back. It sips fuel, hums along at 1800rpm instead of 3600rpm, and goes 500hrs between service intervals. When it's running, I can turn on anything in the house and never give it a second thought. I couldn't be happier.

https://www.auroragenerators.com/product-page/agi13p
 
Last edited:
I have a 120kW Taylor Diesel with 500 gallon + 150 gallon reserve diesel tanks. Has a Perkins 6-cylinder engine and it’s own custom-built dedicated generator “House” (and I do mean HOUSE).

The transfer switch on the thing is 6-feet tall by 2.5 feet wide and weighs 300 pounds.

It was originally intended to be used in a new chicken-house setup that never got built. So I got a $30K generator for $7K.

I also have my own Biodiesel processing “plant” that can make 110-gallons per week. Just need to get it setup. Bought it from a local municipality last year.

Also got one of these. A 30kW mobile diesel from a GOV auction with only 8 hours on it. Looks brand new! John Deere 4-cyl diesel.

IMG_8285.jpeg

IMG_8287.jpeg
 
I live in rural NE Texas, and we experience power outages often. Some last for days. This year, we've been hammered by bad weather, and this last round is the 12th time I've been on generator power this year, and it's only the first of June. I've played the "generator game" for decades, starting off with one that I thought would be just good enough to keep me going, running the bare minimum appliances until the power came back on. This was torture, and a big mistake. I have a barn full of generators that I no longer use.

In my opinion, most people make bad decisions when it comes to buying a backup generator. They think small, and short run times. The truth is, here in Texas, you need one big enough to power your whole house, including air conditioning and heating. Trust me, your wife and kids won't take kindly to living like a cave man during a power outage when they find out there is something better. Just ballparking, but for a 2,000 sqft house with a family of four, you are talking at least a 12KW - 13KW running watt (not surge watt) generator. If you want to stay married and keep your kids from running away from home, don't think about anything smaller. I'm also assuming here that you have a VERY energy efficient house with all LED lights etc.

And, you want it fuel efficient enough to run all day on a tank of fuel. Also, you want one built to go extended run times. Most of these smaller camping or job site generators won't cut it, since they won't run very long under a load between fueling, and require oil changes every 50 hours. You're not powering a tent or a shade tree mechanics session. You are powering your house, and you may have to do it for many days.

Where propane/natural gas generators burn very clean, and propane stores forever, they are VERY inefficient. My brother found out the hard way this year in Houston when he lost power for six days. Those 5 gallon propane cylinders he used to power his 12KW dual-fuel generator only lasted about four hours. And, by day three, they were really hard to find. So much so, that he had to switch to gasoline after spending $800 on propane for three days and then not being able to find any refills. Under a SHTF scenario, natural gas might not be that much better. Here in Texas during the "big freeze" a few years ago, many people lost natural gas pressure!

Gasoline is much more fuel efficient. I've stored ethanol-free treated gas in large quantities for almost three years. However, diesel is the best. It's the most fuel efficient. Modern day diesel generators are incredibly fuel efficient, and this last round I was running on treated diesel that I had in storage over five years.

With the world like it is, and getting worse, you need to consider a properly-sized backup generator. Things like fuel, fuel storage, and fuel availability in case of a SHTF scenario should be seriously considered. I know some of you are saying: "Oh, but I can keep the fridge, TV and a few lights running with my 2 - 5K watt Brand X and 300 ft of extension cords.." I've been there and done that many times. It SUCKS!

It's not about "getting by." It's about keeping your family calm and comfortable during an emergency. If I had just bought what I have now instead of spending money on a barn full of "just getting by", I would be thousands of dollars ahead of the game. So, before you go plop down a roll of cash on that new rifle or bass boat, you might want to consider what could benefit you more in the long run. If you're curious, here's what I ended up with a few years ago (linked below), and I've never looked back. It sips fuel, hums along at 1800rpm instead of 3600rpm, and goes 500hrs between service intervals. When it's running, I can turn on anything in the house and never give it a second thought. I couldn't be happier.

https://www.auroragenerators.com/product-page/agi13p
Interesting that the Perkins engine is using glow plugs in that application. How long does it take to fire up after the power goes off?
 
  • Like
Reactions: Hobo Hilton
Interesting that the Perkins engine is using glow plugs in that application. How long does it take to fire up after the power goes off?
The transfer time is programmable. It's a warm climate down here, so it's currently set for 30 seconds. I thought about increasing it to a minute for winter time. But, it doesn't seem to need it with the 5w-40 engine oil.
 
I am currently working on putting together a 12KW solar system. But, the sun doesn't shine everyday here, and the generator will still be necessary.
My bitch about solar is the space required for all the panels.
Once they figure out how to make that part more efficient - life will be better.
 
My bitch about solar is the space required for all the panels.
Once they figure out how to make that part more efficient - life will be better.
Yeah, I'm gonna lose 1,000+ sq ft of ground space for my solar project. But, those a$$ hats in power are pushing me into it. Maybe I can recoup some of my expense in tax credits. At least panels are getting cheaper and better. So are controllers, inverters, and batteries.
 
  • Like
Reactions: MadDuner
When Hurricane Harvey hit (we got the edge of the eye), I used a 4375/3500 watt generator to run things. During the day, I ran my fridge, a couple of freezers and an electric fan or two. At night I ran a window unit in the bedroom so I could sleep.
It wasn't perfect, but it's what I had. We were without power for a few days, worse was no running water.
I just picked up a 9500 watt inverter/generator, I'll need to pick up a new, small air conditioner.
If you have natural gas to your home, that would be, typically the best route. We never lost natural gas during that event (work has a large, natural gas piped generator).
But, certainly, bigger is better, I saw quite a few homes being powered by the big, worksite welders as lots of folks have those that work either the oil fields or the shipyards.
 
16Kw Generac here.
Auto transfer switch when the power goes out.
It "exercises" itself once a week to keep battery charged and I've been told it's not good to let them sit for too long anyway
Oil dipstick and battery pad heaters.
Propane with its own 500 gallon tank.

It runs the whole ranch, water well included.

Never know the power went out unless you step outside and hear it running.

The only disagreement I have with OP's statements is mine seems very efficient.

Propane IMHO is the way to go. But I'm not dickin with 5 gallon gas grill tanks either.
 
  • Like
Reactions: shields shtr
Yeah, I'm gonna lose 1,000+ sq ft of ground space for my solar project. But, those a$$ hats in power are pushing me into it. Maybe I can recoup some of my expense in tax credits. At least panels are getting cheaper and better. So are controllers and batteries.

We have a small, offgrid solar farm with 36x Panasonic 400W panels and 18x 96V/200Ah LiFePo4 batteries. We are in the Deep South, so solar can be a pretty effective option. The 30kW diesel generator is intended to just recharge batteries during low-sun periods when the batteries drop to ~25%.

Much more efficient use of diesel fuel and generator output to use 100% of the power to recharge the battery farm.

We want to double our battery capacity this year, but those damn things are >$2K each.
 
I live in rural NE Texas, and we experience power outages often. Some last for days. This year, we've been hammered by bad weather, and this last round is the 12th time I've been on generator power this year, and it's only the first of June. I've played the "generator game" for decades, starting off with one that I thought would be just good enough to keep me going, running the bare minimum appliances until the power came back on. This was torture, and a big mistake. I have a barn full of generators that I no longer use.

In my opinion, most people make bad decisions when it comes to buying a backup generator. They think small, and short run times. The truth is, here in Texas, you need one big enough to power your whole house, including air conditioning and heating. Trust me, your wife and kids won't take kindly to living like a cave man during a power outage when they find out there is something better. Just ballparking, but for a 2,000 sqft house with a family of four, you are talking at least a 12KW - 13KW running watt (not surge watt) generator. If you want to stay married and keep your kids from running away from home, don't think about anything smaller. I'm also assuming here that you have a VERY energy efficient house with all LED lights etc.

And, you want it fuel efficient enough to run all day on a tank of fuel. Also, you want one built to go extended run times. Most of these smaller camping or job site generators won't cut it, since they won't run very long under a load between fueling, and require oil changes every 50 hours. You're not powering a tent or a shade tree mechanics session. You are powering your house, and you may have to do it for many days.

Where propane/natural gas generators burn very clean, and propane stores forever, they are VERY inefficient. My brother found out the hard way this year in Houston when he lost power for six days. Those 5 gallon propane cylinders he used to power his 12KW dual-fuel generator only lasted about four hours. And, by day three, they were really hard to find. So much so, that he had to switch to gasoline after spending $800 on propane for three days and then not being able to find any refills. Under a SHTF scenario, natural gas might not be that much better. Here in Texas during the "big freeze" a few years ago, many people lost natural gas pressure!

Gasoline is much more fuel efficient. I've stored ethanol-free treated gas in large quantities for almost three years. However, diesel is the best. It's the most fuel efficient. Modern day diesel generators are incredibly fuel efficient, and this last round I was running on treated diesel that I had in storage over five years.

With the world like it is, and getting worse, you need to consider a properly-sized backup generator. Things like fuel, fuel storage, and fuel availability in case of a SHTF scenario should be seriously considered. I know some of you are saying: "Oh, but I can keep the fridge, TV and a few lights running with my 2 - 5K watt Brand X and 300 ft of extension cords.." I've been there and done that many times. It SUCKS!

It's not about "getting by." It's about keeping your family calm and comfortable during an emergency. If I had just bought what I have now instead of spending money on a barn full of "just getting by", I would be thousands of dollars ahead of the game. So, before you go plop down a roll of cash on that new rifle or bass boat, you might want to consider what could benefit you more in the long run. If you're curious, here's what I ended up with a few years ago (linked below), and I've never looked back. It sips fuel, hums along at 1800rpm instead of 3600rpm, and goes 500hrs between service intervals. When it's running, I can turn on anything in the house and never give it a second thought. I couldn't be happier.

https://www.auroragenerators.com/product-page/agi13p
Your post is well taken. However, my generator (inefficient as may be) is hooked directly to my 500 gal propane tank. The tank is wirelessly connected to the propane distributor to refill at 25% level so I don't even have to get off the couch. (And yes, one time they delivered when the power was out) At the cost of that appropriate diesel generator and the cost of diesel, I can buy an awful lot of propane. The generator also has an 8 gal gas tank that I can use if needed. The generator is hooked directly to the main breaker box and runs most (not all) of the house. It'll run one, but not both of the house AC's. (House is big enough that we have two HVAC units feeding the house)
 
I have a 120kW Taylor Diesel with 500 gallon + 150 gallon reserve diesel tanks. Has a Perkins 6-cylinder engine and it’s own custom-built dedicated generator “House” (and I do mean HOUSE).

The transfer switch on the thing is 6-feet tall by 2.5 feet wide and weighs 300 pounds.

It was originally intended to be used in a new chicken-house setup that never got built. So I got a $30K generator for $7K.

I also have my own Biodiesel processing “plant” that can make 110-gallons per week. Just need to get it setup. Bought it from a local municipality last year.

Also got one of these. A 30kW mobile diesel from a GOV auction with only 8 hours on it. Looks brand new! John Deere 4-cyl diesel.

View attachment 8433021
View attachment 8433022
I will send you a cashiers check for $12000
please forward $3000 to my shipping company, they will pick it up and deliver to me

pleased to be thanking you for such awesome generator solar power my friend
 
  • Like
Reactions: TheHorta
Likely a lot depends on where folks live, plus what needs are.

AC for folks in the heat belts, especially depending on age. Hole home is a nice comfort feature, but short term. If possible back that up with ability to cool just a single room, if needs be, for a bit longer period.

For heat? Similar, just a comfort. Pretty much wood is the only realistic long term. Propane, Kerosene etc are just good so long as fuel is avail. I would surmise folks with big propane tanks, also have wood heat. Of some kind.

Us? 18KW NG, with portable backup.

Heat is NG, no wood (yet). Backup is propane.

Summers get pretty hot on occasion, but for us "likely" wouldn't be lethal without AC. Winters get cold, however similarly "probably" not lethal, even without backup heat. Wouldn't be comfortable, but wouldn't die. Lots of areas of the country could tho...
 
For those better schooled in diesel gennys, why don't I see references to "inverter" on the web pages? I ask because a neighbor rented a good sized diesel genny on a trailer to power his 3200 sq ft house for about 12 days during hurricane Ian in 2022, and claimed it caused him to need new refrigerators, washer, dryer, and dishwasher, and he said he was told diesel gennys don't provide clean power.
 
  • Like
Reactions: TheHorta
Generators are not a SHTF solution. Its just something to maintain comfort during typical power outtages. He used the term backup, not prime power generator.

Good writeup!
Thanks. No, generators are not a total power solution. I get my power from a co-op. I will say that even though the electricity is cheap, the power outages in my area have become more frequent, and taking longer for the power company to get back up and running. I thought I had it bad, but a friend who lives just outside of Houston city limits has more power outages than we do! The way things are headed, I think it will just get worse.
 
For those better schooled in diesel gennys, why don't I see references to "inverter" on the web pages? I ask because a neighbor rented a good sized diesel genny on a trailer to power his 3200 sq ft house for about 12 days during hurricane Ian in 2022, and claimed it caused him to need new refrigerators, washer, dryer, and dishwasher, and he said he was told diesel gennys don't provide clean power.
I guess it depends upon the generator. Mine gives a pretty clean sine wave power. It good enough to fool my APC power supply into thinking it's really clean. I've never had any problems.

Inverter generators are pretty neat. They just weren't big enough to power my whole house. Which, is what I was looking for.
 
Were on the minimal bare bones approach. 11kW Kubota diesel. I can keep refrigerator, freezers, misc kitchen appliances, well pump, comms, lights, and furnace going. With our loading we average about 0.6 gallon per hour with the furnaces blower going. There is a 99 gallon aux tank to feed it. The 20kw Gas Cummins will burn 3.6 gallons at full load and 1.5 at 25% on propane. The two smaller machines the 17 and 13 burn about the same at low load, there is a $200 difference between the small one and the larger one. If you have a heat pump your going to need the larger machine if you do not have any auxillary heating methods. People that have gas heat I recommend them buying a mini split or one of the portable AC to cool a room if they are insistent on having cooling . Were in North Texas and will be in northern AR soon, so the weather can get unruly anytime in the year. Having a machine that is large enough to run an entire house is unreasonable, the cost of the machine and the cost of fuel to operate does not make sense unless you just have a bunch of extra money to burn. We do have a toy hauler that we can run the AC on to cool off if needed. I have installed a ton of backup generators over the years as an electrician and the people that I've installed whole house generators and found out how much it costs to operate like they are on grid power have all gone to the absolute minimal load strategy. I have gotten too many calls afterwards of well my machine ran for this many hours and quit, mad at me that the machine shut down only to find they burned all of the propane they had. It's not that the gasoline / propane / natural gas is less efficient there are less BTUs in a gallon of propane, or a gallon equivalent of NG than gasoline, and gasoline is less than diesel. This spring was the first time in two years that mine has run more than it's monthly scheduled run.
 
I guess it depends upon the generator. Mine gives a pretty clean sine wave power. It good enough to fool my APC power supply into thinking it's really clean. I've never had any problems.

Inverter generators are pretty neat. They just weren't big enough to power my whole house. Which, is what I was looking for.
My little Kubota has a clean waveform, harmonics and frequency are stable as long as you stay in the load range. I have a load controller that monitors loads and generator parameters and takes care of all that. Pretty much at the machines in the commercial class are not going to be an issue. They could have had the voltage regulator set to high or low, or other loads cycling and increasing the harmonics. Or the governor was not maintaining frequency ( which could be from overload or something hard starting)
 
  • Like
Reactions: Milf Dots
For those better schooled in diesel gennys, why don't I see references to "inverter" on the web pages? I ask because a neighbor rented a good sized diesel genny on a trailer to power his 3200 sq ft house for about 12 days during hurricane Ian in 2022, and claimed it caused him to need new refrigerators, washer, dryer, and dishwasher, and he said he was told diesel gennys don't provide clean power.

All generators have the same problem, regardless of fuel type. Better generators will have power conversion and filtration — waveform / sinewave / etc — that will filter and condition the power so it won’t negatively affect sensitive electronics.

Modern office buildings and sensitive datacenters are almost universally backed by diesel generators. They require VERY tight tolerances.

Your homey rented the wrong unit. It never should have been used for a home.
 
We have a small, offgrid solar farm with 36x Panasonic 400W panels and 18x 96V/200Ah LiFePo4 batteries. We are in the Deep South, so solar can be a pretty effective option. The 30kW diesel generator is intended to just recharge batteries during low-sun periods when the batteries drop to ~25%.

Much more efficient use of diesel fuel and generator output to use 100% of the power to recharge the battery farm.

We want to double our battery capacity this year, but those damn things are >$2K each.
Dang dude. I have a small offgrid cabin with solar and 69kwh of lifepo4 batteries that will give me close to two weeks run time without sun. I’ll prob double that to 150kwh or so for the house I want to build.

What the heck are you doing that you have 345kwh of power and need to double it??
 
As I've said on several threads here, I have a Westinghouse Wgen9500DF. It will handle the HVAC and have a bit left over to spare. I wish I could get a full house generator like a Kohler, but the problem with that is there is no available fuel source. We don't have a natural gas pipeline, nor do I have a large propane tank (nor could I get one installed - HOA rules). :mad:

WGEN9500DF-HEROR_720x.jpg
 
Dang dude. I have a small offgrid cabin with solar and 69kwh of lifepo4 batteries that will give me close to two weeks run time without sun. I’ll prob double that to 150kwh or so for the house I want to build.

What the heck are you doing that you have 345kwh of power and need to double it??

We suck down power like it’s going out of style. The added capacity would be more for endurance than anything, and it’s all going in a Conex and heading to our new pad this November, so we’ll be using it as our primary source of power to survive in Kenya.
 
As I've said on several threads here, I have a Westinghouse Wgen9500DF. It will handle the HVAC and have a bit left over to spare. I wish I could get a full house generator like a Kohler, but the problem with that is there is no available fuel source. We don't have a natural gas pipeline, nor do I have a large propane tank (nor could I get one installed - HOA rules). :mad:

WGEN9500DF-HEROR_720x.jpg
That's why I went with diesel. I determined that to run my whole house for a week in the summer would take my whole 250 gallon propane tank.
 
I have a 120kW Taylor Diesel with 500 gallon + 150 gallon reserve diesel tanks. Has a Perkins 6-cylinder engine and it’s own custom-built dedicated generator “House” (and I do mean HOUSE).

The transfer switch on the thing is 6-feet tall by 2.5 feet wide and weighs 300 pounds.

It was originally intended to be used in a new chicken-house setup that never got built. So I got a $30K generator for $7K.

I also have my own Biodiesel processing “plant” that can make 110-gallons per week. Just need to get it setup. Bought it from a local municipality last year.

Also got one of these. A 30kW mobile diesel from a GOV auction with only 8 hours on it. Looks brand new! John Deere 4-cyl diesel.

View attachment 8433021
View attachment 8433022
Damn dude...

You have all the coolest toys.

Do you wear $40k quads while you tinker on this beast at 3am?
 
But where do you store your Diesel fuel? Or do you bring it to your house like I bring my non-ethanol gas... in 5 gallon Jerry cans?
I've used everything from 55 gallon barrels to 5 gal diesel cans. I also have two diesel tractors to feed. The trick to storing diesel is to keep it from forming paraffin in freezing weather, and keep the moisture and algae out of it. A good diesel fuel treatment will work for this. This last outage, I was using diesel that was stored for over five years.
 
  • Like
Reactions: 91Eunozs
I've used everything from 55 gallon barrels to 5 gal diesel cans. I also have two diesel tractors to feed. The trick to storing diesel is to keep it from forming paraffin in freezing weather, and keep the moisture and algae out of it. A good diesel fuel treatment will work for this. This last outage, I was using diesel that was stored for over five years.
I have two 500 gallon fuel cubes full of diesel at work, but generally move it around with my in-truck 105 gallon transfer tank.

I manufacture (assemble) small diesel gensets for mobile applications in trucks and trailers. 12kw to 500kw. So I'm always testing/using/replacing the fuel in the cubes. I leave one 40kw, sound attenuated (quiet) genset on a trailer at my home, but use a small solar invertor/battery system to run the refrigerator and freezer and a swamp cooler if regular air conditioning isn't required. For an extended outage I would just bring a fuel cube home at a time and run the big genset if it's during the summer. The way they are talking about power issues for this summer - I'm anticipating having to run the big one.
 
I'm in the process of being 100% off-grid. We are just getting by right now with a Harbor Freight quiet inverter generator and 2 Ecoflow solar generators. It works but I hate having to buy the gasoline. It will run about 15 hours on a full tank.
For primary power, I have all of this but not yet installed:


Secondary is a 22Kw Generac on propane. I will have it rigged to charge those batteries if needed...The inverters will be powering everything 100% of the time.
I have a solar powered water well that I do not have backed up to batteries. I CAN run it on a generator but I doubt I will ever need to. I have the well pump running at 10% capacity and it takes most of a day to fill the 1100 gallon storage tank. It only cycles on for a few minutes a day now. Part of the reason I went with the storage tank was this water has a sulfur content. Most wells around here do. It's not bad and it's not bad for you but it does smell. By allowing that water to off-gas in the 1100 gallon tank, there is almost zero sulfur at the house. The other reason was to have some capacity on surface in case of downhole pump failure.


The same company has a tankless pressure pump that I am using to pump from the storage tank to the shack. It has battery backup and works flawlessly. In fact, when I first installed it, the charge controller was bad and the batteries powered the pump for over a week while they sent a new controller.

EDIT: Yes, there is some space taken up by the panels. However, I have 112 acres with 3 ponds, 2 creeks, trees, grass, etc. We will have bees, beef, chickens. We already have some garden and that space is going to increase. That space being used for solar is just fine with me.
 
Last edited:
We have a small, offgrid solar farm with 36x Panasonic 400W panels and 18x 96V/200Ah LiFePo4 batteries. We are in the Deep South, so solar can be a pretty effective option. The 30kW diesel generator is intended to just recharge batteries during low-sun periods when the batteries drop to ~25%.

Much more efficient use of diesel fuel and generator output to use 100% of the power to recharge the battery farm.

We want to double our battery capacity this year, but those damn things are >$2K each.
You are similar to me. As well as dude before you:

16Kw Generac here.
Auto transfer switch when the power goes out.
It "exercises" itself once a week to keep battery charged and I've been told it's not good to let them sit for too long anyway
Oil dipstick and battery pad heaters.
Propane with its own 500 gallon tank.

It runs the whole ranch, water well included.

Never know the power went out unless you step outside and hear it running.

The only disagreement I have with OP's statements is mine seems very efficient.

Eastern TN checking in. Not always sunny here-very wet.

36 (completely offgrid) bi-facial Canadian panels (I over provisioned based upon need). 6 Batteries, excellent quality and a 15kW inverter (SolArk). South facing on ground. (Yes, not cheap but got almost $20k in Fed taxes returned-cheaper than local monopoly electric assholes who cannot keep power on).

15kW Generac generator (propane that monitors batts and fully charges them when ~25%.) The battery array can run whole house when fully charged, for ~3 days on normal usage. Generator fires once a week for 15mins to confirm and lube shit.

Battery array charges from 0-100% in ~5hrs of sunlight , or Generator run (~20-25gals) on a 1000 gal tank that never is below 50%.

I wouldn't know if if volcanic eruption, nuclear ash or Zombies (or a very drunk bear took out my panels) for many days. Unless generator is running. I will not be without power. As designed.

Shit is doable-if you find the right dirty-hippy-solar guy. And I have a friend here similarly situated, who has done this shit for decades. He is now saying he needs to upgrade to "my place" once he saw results of ambient light and so on. This is not "latest and greatest"-it was what he liked best doing this for decades.

Just sayin'. And adding an opinion for those looking.
 
Last edited:
I was a dedicated generator guy for decades, hurricanes here were a challenge to be overcome.

Started w/ a 15kw LP Generac w/ 300 gallons of LP.
Eventually parts became scarce for the Generac, switched to a 21kw Perkins Diesel.
Most of our vehicles are Diesel, so storing a few drums of treated fuel worked for the gen and vehicles.
After 10 years w/ the Perkins, it started to need parts.
No problems finding the parts, but I did not want to need a part when in the middle of an extended "grid down".

So I learned about solar power, and over the last 3 years (a little at a time, as budget allows) have put in enough PV panels and batteries to run the heat pump, some lights & refrigerator on PV if the Sun is out, or on battery if not.

Funny thing is that now the only thing I use the generator for is charging the solar batteries, if they get low before any Sun is available.

The generator is no longer a critical power source.

Solar has no moving parts - except that bright thing in the sky........
 
  • Like
Reactions: TheHorta
My bitch about solar is the space required for all the panels.
Once they figure out how to make that part more efficient - life will be better.
Out here in the desert southwest, a lot of the roofs are flat. I have 40 panels on mine and could get another 30 up there if I needed it. I'm grid tied so the utility didn't want to let me have more because they would have had to swap out the transformer feeding my part of the grid.

The part I don't like is if the grid goes down, then my micro-inverters shut down for safety on the grid. In a pinch, I could shut off the main and feed 240v from a small inverter back into the panel and it would trick the system to start generating power. My plans put the power at 10KW, but I don't think it puts out more than 8.5KW.

I wanted to go off-grid but my wifey said no, she wanted it to be drop-dead simple because she is confident I'm going to drop dead and she wouldn't be able to maintain it. (should I be concerned about sleeping at night - or any time for that matter?)
 
Our house has a 12kw NG generator and I have the propane nipples for it as well with a 500 gallon tank. The tank ran our entire house for 7 days last year and only used about 1/4 tank. However we recently had 65 solar panels mounted on our barn and they are generating slightly more than $1000 worth a power a month. They are direct grid tied right now as I was not willing to drop another $5G in battery storage. I figure later this year I will set it up and have a line run to the house