PreppenWolf
Solar Wizard
- Joined
- Oct 10, 2022
- Messages
- 1,007
Would like advice on doing a stand alone 3kW cabin build.
I have a full house build already. Here link to it.
diysolarforum.com
I'm in NH so the batteries will be lead acid due to cold weather and no heat in cabin. I don't need help choosing batteries.
Planning on 48V.
Want 3kW 120V AC, single phase.
Panels I have covered and on hand already I can assign up to 5kW.
My big questions are:
Quiet inverter options? It's a small cabin 12ftx16ft.
Lowest idle consumption?
Ability to load shed excess to a heater for winter?
I'm currently thinking Growatt SPF 3000TL. Any reasons with my questions above I shouldn't go this route?
I have a full house build already. Here link to it.

EG18KPV (formerly 6500s) 120/240 Setup, 48V 105kWh Battery & Overkill 100A BMS Install
Edit 3/4/25 - EG4 18K has replaced the 6500EXs. No changes to battery or panel capacity. PV strings altered to 10s2p, 10s1p, and 10s1p for the (3) MPPTs on the 18k via a new 6 to 3 combiner box. EDITED: I've made this my build thread, so while there is an OP question below if you keep reading...

I'm in NH so the batteries will be lead acid due to cold weather and no heat in cabin. I don't need help choosing batteries.
Planning on 48V.
Want 3kW 120V AC, single phase.
Panels I have covered and on hand already I can assign up to 5kW.
My big questions are:
Quiet inverter options? It's a small cabin 12ftx16ft.
Lowest idle consumption?
Ability to load shed excess to a heater for winter?
I'm currently thinking Growatt SPF 3000TL. Any reasons with my questions above I shouldn't go this route?