First post here. Sorry for not being a contributor before asking for help. If there is an Amazon referral link for this forum or a donation page, I'll be more than happy to give back.
I'm designing/building my primary residence in E. Washington state. 16ac of very secluded land. No power available anywhere. I have some background back in the day as a 2 year residential journeyman electrician but that was 20+yrs ago and my math is bad.
I've done quite a bit of reading but want any advice from the vets if I'm on the right/wrong track.
Here is where we are:
1. We have done our power audit and we are a solid 8500/11,000(w/loss) daily watts on the worst day (Mini split, laundry, vacuuming). This includes everything except my shop which will have its own system but not for 12-18 months after the house is finished.
2. Just my wife and I and our 2 dogs. No kids and probably not many visitors.
3. Budget build. Every for the house build is cash unfortunately and will have to make every dollar go as far as we can.
4. House is 1 bedroom/1 bath total of 1232sq. Won't have a garage.
5. Well pump power has been figured out and is on its own system.
6. According to all the maps and charts I feel good about the number of 4hrs of sun light a day.
7. Solar panels will be free of any obstacles and on rotating platforms ran by an Arduino board to get the maximum sun.
8. I have decided on a 24v system.
9. Will have a dual fuel generator for those cloudy times and as a backup.
10. This will be 99% DIY. The extra 1% will be the help and advice everyone gives me!
Here are a couple questions I have.
If I'm at 11kw daily at 24v then I need 460ah of battery. Is this correct? (Wh)/(V) =(Ah)
Then I have to double that so I don't discharge more than 50%? So does that means I want 940ah of batteries?
And then I want 3 days of total battery capacity so I want 2820ah of batteries?
I've decided on 12v 100ah (C20) batteries. This is all I can afford unfortunately and I have 4 of these in our Sprinter van so I'm familiar with them. So does this mean I need 29 batteries? Wait, I'm 24v so now I need 58 batteries because I have to double my voltage but it doesn't double my amp hours. Is this all correct so far before I go any further?