Solar Questions
I'm interested in adding solar power and lithium batteries to our trailer, but I'm getting lost in the weeds. For starters I calculated what I think would be our worst case power need (without u...
Forum Discussion
The OP said no winter camping (for now anyway) but here is an example with the 5er with six batts doing four nights with temp near freezing in January:
After two nights, next morning 12.1v (50%) and down 292 AH. (146/day)
Recharge with gen/charger (no solar) for two hours --constant 150 amps for 0.5 hr and 1.5 hrs tapering now down 78AH, restored 214AH. Figured that meant at 87% SOC of 584AH full. (Not new batts down in capacity near freezing)
So do third night, now down 227AH so 227-78 = 149 used. Now need another night, and 227 + 149 = 376 down, so would be at 208/584= 36% SOC. Oops, have to recharge again to top up to stay above 50% next day before going home.
The Trimetric monitor being very useful!
So can't continue with every second day recharge. Can restore 214 in the park gen time 9-11am and using 149/day, so can keep going if recharge every day.
You do get an extra 10% AH the first day from starting at full before going into 50-90s which can help on a weekend trip.
After two nights, next morning 12.1v (50%) and down 292 AH. (146/day)
Recharge with gen/charger (no solar) for two hours --constant 150 amps for 0.5 hr and 1.5 hrs tapering now down 78AH, restored 214AH. Figured that meant at 87% SOC of 584AH full. (Not new batts down in capacity near freezing)
So do third night, now down 227AH so 227-78 = 149 used. Now need another night, and 227 + 149 = 376 down, so would be at 208/584= 36% SOC. Oops, have to recharge again to top up to stay above 50% next day before going home.
The Trimetric monitor being very useful!
So can't continue with every second day recharge. Can restore 214 in the park gen time 9-11am and using 149/day, so can keep going if recharge every day.
You do get an extra 10% AH the first day from starting at full before going into 50-90s which can help on a weekend trip.
