Solar & Inverter Sizing Calculator for a Nigerian Home
Build a preliminary energy and capacity scenario from a measured load schedule. Example appliance values, sunshine, efficiency and discharge fractions are editable assumptions—not observations about Nigerian homes or a certified equipment design. Have an installer verify surge ratings, battery limits, protection, wiring and site conditions before purchase.
Your load schedule
| Appliance | Watts | Qty | Hours/day | Wh/day |
|---|---|---|---|---|
| LED bulbs | 9 | 6 | 6 | 324 |
| Ceiling fans | 70 | 2 | 8 | 1120 |
| Television | 80 | 1 | 4 | 320 |
| Decoder / router | 20 | 1 | 10 | 200 |
| Refrigerator (inverter type) | 150 | 1 | 8 | 1200 |
| Total | 444 W | 3164 |
7.03 kWh
of solar panels: 937 W
| Appliance | Watts | Qty | Hours/day | Wh/day |
|---|---|---|---|---|
| LED bulbs | 9 | 6 | 6.0 | 324 |
| Ceiling fans | 70 | 2 | 8.0 | 1120 |
| Television | 80 | 1 | 4.0 | 320 |
| Decoder / router | 20 | 1 | 10.0 | 200 |
| Refrigerator (inverter type) | 150 | 1 | 8.0 | 1200 |
Works without JavaScript — the figures above are a worked example using the default values.
Before you rely on this
- Use measured appliance energy or a justified duty cycle. Eight hours for an example refrigerator is not a universal compressor runtime.
- The running-power multiplier does not test motor starting surge. Watts and VA are not interchangeable; confirm power factor and the inverter’s continuous/overload ratings.
- The panel formula models daily-energy replacement, not recovery of a depleted battery in a specified time. Season, shading, charging limits and compatibility can change the design.
- Quotes and product specifications must be compared like for like. This tool does not establish battery lifespan, price superiority or a guaranteed number of overnight hours.
How this is calculated: Energy-balance arithmetic from entered appliance loads and explicit scenario assumptions. This is not a manufacturer-certified design or a measured solar-resource dataset. · Data as of 2026-09-28
The example guide matches the calculator’s formulas. Panel derate and inverter power margin are exposed inputs. Battery charging recovery, seasonal generation, surge duration, power factor, BMS current limits and wiring/protection are not fully modelled.
Worked examples, sources and correction log