Shared build
Cabin Solar Build
System12VDaily1.6 kWhPeak55WSun5h/dayAutonomy3d
☀️
Solar Panels
My part solar panel × 4
100W each400W totalmonoVoc 12V
Unknown
Custom
Battery Bank
Renogy 12V 200Ah Bluetooth Self-Heating Lithium LiFePO4 Deep Cycle Battery, 5000+Deep Cycles, dust-Proo
LiFePO412V200Ah2.3 kWh usable
Inverter
Renogy Inverter P2 700 watt Pure Sine Wave Inverter, Solar Car Power Inverter 12V to 120V AC Converter
700W continuous1400W peak12V input
Parts total$1,488.13*
Prices are estimates — check the retailer for current pricing before purchasing.
System calculations
Solar array
400W
4 × 100W
Usable battery
2.3 kWh
200Ah @ 12V
Est. daily harvest
1.5 kWh
5h sun · 75% eff
Controller
MPPT 30A
Max charge current
Inverter output
700W
Continuous AC
Days of autonomy
1.5 days
2.3 kWh / 1.6 kWh/day
Runtime at peak load
1.6 days
55W peak draw · 90% inverter eff
Solar recharge time
7.6 hours
Full usable battery from panels
Controller-limited charge
7.6 hours
~25.0A effective charge
Inverter headroom
645W
Above selected peak load
Estimates assume 5h peak sun and 75% real-world harvest efficiency.
⚠️ Compatibility warnings
⚠️
Controller Output
400W of panels can need about 33.3A of controller output on a 12V bank. The 30A controller may throttle in strong sun. At 24V this array only needs 16.7A — switching system voltage would resolve this.
🔵 Wire & fuse guide
Wire sizes follow NEC 310.15 ampacity. Always size for your run length and ambient temperature.
Want to build your own?
SolarBuddy sizes your system and checks compatibility as you pick parts.
Open SolarBuddy →Free · No signup required