Shared build
Cabin Solar Build
System12VDaily3.1 kWhPeak236WSun4.5h/dayAutonomy3d
Solar Panels
RICH SOLAR 250 Watt 12 Volt 16BB Monocrystalline Solar Panel N-Type Cells High Efficiency Solar Module for × 4
250W each1000W totalmonoVoc 12V
⚡
Charge Controller
Victron Energy SmartSolar MPPT 150/70-Tr
MPPT70AMax PV 150V12V/24V/36V/48V
Battery Bank
Renogy 12V 200Ah Bluetooth Self-Heating Lithium LiFePO4 Deep Cycle Battery, 5000+Deep Cycles, dust-Proo × 4
LiFePO412V800Ah9.1 kWh usable
Parts total$2,852.82
Prices are estimates — check the retailer for current pricing before purchasing.
System calculations
Solar array
1000W
4 × 250W
Usable battery
9.1 kWh
800Ah @ 12V
Est. daily harvest
3.4 kWh
4.5h sun · 75% eff
Controller
MPPT 70A
Max charge current
Inverter output
300W
Continuous AC
Days of autonomy
3.0 days
9.1 kWh / 3.1 kWh/day
Runtime at peak load
1.4 days
236W peak draw · 90% inverter eff
Solar recharge time
12 hours
Full usable battery from panels
Controller-limited charge
12 hours
~62.5A effective charge
Inverter headroom
64W
Above selected peak load
Estimates assume 4.5h peak sun and 75% real-world harvest efficiency.
⚠️ Compatibility warnings
⚠️
Controller Output
1000W of panels can need about 83.3A of controller output on a 12V bank. The 70A controller may throttle in strong sun. At 24V this array only needs 41.7A — 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.
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