How to Use

1. Enter your devices

   • Give each appliance a name (e.g. “Fridge”), how many you have, its watt rating (e.g. 120 W), and how many hours you run it in the day and at night.

   • We turn that into kWh (kilowatt-hours) automatically.

2. Set up your system

   • Panel wattage: size of the solar panel you plan to use (default is 600 W).

   • Sun hours: average full-sun hours per day where you live (default is 5 h).

   • Battery voltage: pick 12 V, 24 V or 48 V (default is 24 V).

3. See your results

   • ☀️ Day / 🌙 Night / Total kWh – how much energy you need in daytime, at night, and overall.

   • Panels needed – how many solar modules to buy (we add about 20% extra for real-world losses).

   • Battery size – how much storage you need, shown in both kWh and amp-hours (Ah) at your chosen voltage.

   • Inverter size – the minimum power (in kW) your inverter must handle.

 

What the numbers mean

• kWh: energy used, not just a momentary wattage.

• Panels: we round up so you’ll have enough even with wiring and inverter losses.

• Battery: gives you enough juice to cover night-time use plus a safety margin.

• Inverter: sized to run all your appliances when your panels are producing.

 

Just type in your data and watch the calculator update in real time—no formulas to worry about!