Google doc of Calcs and Specs
See link above with Specs and Calcs. Here is the basic info:
Daily watt demand: ~4000Wh.
Battery size: 4.3 kWH
Pannels: 4x250W panels 2S2P
Inverter: Growatt inverter 24V 3000W
Open voltage @-30 degrees : 75.6 volts
Max voltage for inverter is 145Vdc.
Generator Back up at night for overcast days.
Months of operation: Oct-Nov. Worst case sun hour for Nov, 2.85
My questions, Need feedback:
See link above with Specs and Calcs. Here is the basic info:
Daily watt demand: ~4000Wh.
Battery size: 4.3 kWH
Pannels: 4x250W panels 2S2P
Inverter: Growatt inverter 24V 3000W
Open voltage @-30 degrees : 75.6 volts
Max voltage for inverter is 145Vdc.
Generator Back up at night for overcast days.
Months of operation: Oct-Nov. Worst case sun hour for Nov, 2.85
My questions, Need feedback:
- Is this feasible? with temps getting down to the low teens in Fahrenheit. (Battery will be indoors but could get down to 32degrees). Also with overcast days and our load of 4kW per day. Are these able to withstand the elements? We would use a generator to recharge the battery at night as well. And we would really only use on weekends/ 4 days at a time.
- Leaving for long periods at a time: Could we leave this out there for a month un monitored? or should we pack in and pack out the battery? and leave the growatt and pannels?
- If we were to upgrade: we would likely upgrade panels from 1kw to 1.5kw. and Battery size 4.3kw to 7.3kw by adding a 3kw battery.