Building a system for Off grid cabin mainly to power fridge and 110 volt composting toilet.

[Sgt Ski]

Thinking about 24 volt system for a Northern Wisconsin cabin.
For power to fridge, sun mar toilet, maybe small on demand pump for cistern.
800 to 1000 watts of panels. Maybe all in one inverter charge controller. Batteries to be determined.
Will have gas generator available for backup for stretches of sunless periods.
Thinking Mpp for all in one and Battle Born batteries.
Trying to keep costs below 10k for total system. Thoughts?

 

[x98myers7]

sounds similar to my setup. go with as many panels as budget allows for. production is typically FAR less than advertised in the upper midwest. suncalc.org+pvwatts are great tools to estimate production.

battle born are great batteries, but overpriced (in my opinion). knowing it gets super cold up there, how are you going to keep lifepo4 batteries warm?

 

[Sgt Ski]

Batteries will be in utility closest inside and cabin will have propane heat for maintenance of temperature. Refrigerator and other electronics don't like the cold then warming up process especially if they go below freezing.