Solar system size calculator
Estimate the inverter, LiFePO₄ battery and solar array you need for a home or business. Adjust your appliances, autonomy and sun hours — the tool sizes the system instantly. Use it for planning, then ask Deepoint to confirm the final DEYE design and pricing.
1. Your loads
Set quantity, watts and hours/day. Defaults are typical values — edit any cell.
| Appliance | Qty | Watts | Hrs/day |
|---|
2. Recommended system
Estimates use standard engineering rules of thumb (peak × 1.25 inverter headroom, 90% usable battery depth of discharge, daily energy ÷ sun hours for PV). Final design is confirmed by Deepoint.
From appliances to a sized system
The calculator totals your appliances into daily energy (kWh) and peak power (kW). The inverter is sized to handle peak power with 20–30% headroom; the LiFePO₄ battery is sized to cover your chosen autonomy at safe depth of discharge; and the solar array is sized to replace the day’s energy within local sun hours. For the full method, read our inverter sizing guide, or compare hybrid inverters and complete residential, commercial and off-grid systems.