RNG.
Just a few thoughts regarding power. Being completely off grid we have a bit of experience.
You mentioned batteries. Plain batteries not of much value unless you are talking just DC use. You would need an inverter to convert to AC. If you consider batteries, then you’d likely want a solar system. I’d be curious how you might protect the whole system from fire danger.
I’m facing the generator fuel challenge currently. My primary generator is diesel and also have Honda 7000, gas backup and 10kw military. Gas means humping 5 gallon cans. Up until Oct I was able to get diesel delivery, but Walt went out of business leaving choice between 2 entities One has a 300 gal min, the second 400 gal min. Technically i have to have a double walled storage container with appropriate fire department permits. I quit looking when I figured $5k minimum. First company insistent, 2nd not. So I’m in the process of setting up capability to store 550 gallons for second company and hope for a Jan delivery. But I can’t say this is a good long term solution as the delivery company could refuse at anytime saying i don’t have proper storage.
Not only am I no longer eager to keep humping 5 gallon containers, I’m also concerned about when I can’t, especially when I’m dead. So perhaps the solution is propane. Definitely no problem with delivery, we already have a 250 gal tank for the house, but about 200 feet from where generator would reside. So my diesel project has morphed into a diesel and propane project. Some interesting LP generator choices. in many ways, a nice 1800 rpm model would be my choice, but definitely out of budget. As you have found out, these guys don’t sip the propane at over 2g/hr. Just for laughs, my last propane delivery was $5.54/g.
Another thing I recently learned many generators specifically exclude off grid use. Generac and Kohler currently only have 1 warrantied model each in the more affordable, standby type. average life expectancy about 4000 hours. My current choice is leaning Generac Ecogen 7163. My current usage is about 400hr/yr. once installed, I’d sell my big diesel and split use among the Generac, my 10kw military diesel, and the Honda.
As for propane requirements find the installation manual for your model of interest. The Generacs have a table listing requirements. Most will require 10-12 inches WC which is normal secondary regulator pressure. Due to distance from tank I need 1” pipe from tank to the regulator, then 3/4.
Was glad to read about you tank’s fire survival. If you don’t bury a tank can you increase survival by surrounding with a concrete block wall?