One thing I've been meaning to do this year is some updates on our off-grid electric system, just in case anyone's interested, or looking to do it themselves.
I grew up off-grid for a while, so none of it was shockingly new to me, but even so, when we wanted to do it a couple years ago getting numbers was difficult, and installers always wanted to WAY overdo our system. In the end, I'm glad we put our foot down, and ended up doing a much smaller system than anyone(outside of a family friend who installs systems about 4 or 5 hours away from us) was willing to do.
So, now that my wife, myself, and our two boys are living off-grid full time, and living a fairly normal life as far as anyone in suburbia would be concerned looking in from the outside, I thought I'd start a thread that I could update over time.
As a side note, I was going to(or even may have) start this last year, but some damage to our system, and Helene, made it a weird year with downtime. Hopefully an outlier, but maybe not!
I'm also happy to try to answer any questions that anyone might have about any of it.
That all said, we have 7.2 kW of mono-facial solar panels, ground mounted on a hill above our cabin. We have a fairly long electric run, all underground, into an old shed that had a much older system in place when we moved in. We replaced all of that equipment with a new Victron system and EG4-LL V2 LiFePO4 batteries. We have 60kWh of batteries on a 48V system.
That runs to two buildings, one of which is our main cabin and the second is a very small little two room(main room and bathroom) building that may have once been a mother-in-law suite or something like that. My wife uses it as her office space now.
In our main cabin space we added an EcoFlow smart home sub-panel a few years back which all of our circuits runt through. We keep two Delta Pro "solar generators" each with an extra battery on hand that we can run the cabin fully off of as an approximately 15kWh backup.
We also have a small gas powered generator(WEN DF875iX) that we try not to use, but particularly when the system was damaged, we do from time to time. Since we drive off of our property almost zero, the gas used for the generator, and our kei truck to drive around on our property is the vast majority of our gasoline usage. So far this year we've purchased 15 gallons and used about half of that.
That all said, and I'll try to remember to do this quarterly, from January 1st to March 31st this year we had:
-610 kWh of solar generated in January
-579 kWh of solar generated in February
-679 kWh of solar generated in March
-1868 kWh of solar generated in total YTD
-In February we did have a couple of days where we ran the generator. We ran ~5 gallons of gasoline for a total of 35 kWh of power.