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1. Add Your Electrical Loads
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| Device | Watts | Hrs/Day | Wh/Day |
|---|
No loads added yet — pick a preset above or add your own.
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2. Battery & System Settings
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3. Results
0
Wh / Day Consumption
0
Ah / Day at System Voltage
0
Recommended Bank Size (Ah)
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Batteries Needed
0
Solar Panel Watts Suggested
Bank size = (Daily Wh ÷ System Voltage) × Autonomy Days ÷ Depth of Discharge, rounded up. Batteries needed = Bank size ÷ single battery Ah, rounded up. Solar watts = Daily Wh ÷ Peak Sun Hours ÷ (1 − efficiency loss), rounded up. Actual results vary with wiring, temperature, panel angle, and battery age — use this as a starting estimate, not a substitute for a marine electrician's sign-off.