Off-grid power planner
Balance appliance daily energy with a user-supplied solar resource, then estimate PV power, nominal battery kWh/Ah and continuous/startup inverter allowances.
Up to 100 uniquely named appliance rows and 100,000 characters. Quantity 1 to 10,000; running power 0 to 1 million W per unit; hours 0 to 24/day; starting power 0 to 10 million W and at least running power for active units. Positive sun hours up to 24/day; total losses 0 to 99%; positive autonomy up to 365 days; depth of discharge and one-way efficiency above 0 to 100%; bank voltage above 0 to 1,000 V; checked PV power 0 to 1 billion W. JSON report, results CSV and appliance CSV. One appliance per line: name, quantity, running W, hours per day and total starting W per unit. Up to 100,000 characters. Review the settings before running.
Your result
How to use Off-grid power planner
- Enter one appliance per line: name, quantity, running W, hours per day and total starting W per unit.
- Enter worst-month peak sun hours per day, total PV-to-load losses and storage autonomy.
- Enter depth of discharge, one-way discharge efficiency, nominal bank voltage and the startup coincidence assumption.
- Size a balancing array or check an entered array, then review any deficit and export JSON and CSV.
Useful next steps
A daily energy budget
Daily Wh sums quantity × running watts × duty-cycle hours. Worst-month peak sun hours is your sourced daily average, not a bundled climate value. Required PV meets the average daily load after the entered total loss budget. It includes no extra recovery margin after an autonomy event or probability of prolonged bad weather.
Storage and voltage
Nominal battery kWh divides autonomy load by depth of discharge and the one-way battery-to-load efficiency. Ah is nominal Wh divided by bank voltage. The separate PV loss budget should include all relevant generation-to-load losses once; discharge efficiency changes battery capacity and is not multiplied into that PV budget a second time.
Power and startup assumptions
All active appliances are assumed to run together for the continuous allowance. Starting W is the entire per-unit starting load, including running W. Startup can assume every unit starts together or one unit starts while all others run. Zero-hour appliances are inactive. This is an energy/power planning estimate; wiring, fusing, charge-controller sizing, power factor, surge duration and compliance are outside the result.