Energy Calculator

Size your system in minutes.

Tell us what you run and how long you need backup, we'll estimate your inverter, battery, solar array and the diesel cost you'll leave behind. No guesswork, no obligation.

Total daily usage0.00 kWh/day
Lighting
LED bulb
10W
0
Security / flood light
30W
0
Cooling
Ceiling fan
70W
0
Standing fan
60W
0
Air conditioner (1HP)
750W
0
Air conditioner (1.5HP)
1100W
0
Air conditioner (2HP)
1500W
0
Kitchen
Refrigerator
150W
0
Deep / chest freezer
200W
0
Microwave
1000W
0
Electric kettle
1500W
0
Blender
400W
0
Water dispenser
100W
0
Entertainment
Television (LED)
60W
0
DSTV / decoder
15W
0
Sound system
80W
0
Office
Laptop
65W
0
Desktop PC
200W
0
Internet router
15W
0
Printer
50W
0
CCTV system
60W
0
Utility
Water pump
750W
0
Pressing iron
1200W
0
Washing machine
500W
0
Water heater
1500W
0
Healthcare
Vaccine fridge
100W
0
Oxygen concentrator
350W
0
Suction machine
200W
0

Desired solar coverage

100%

Share of your daily energy carried by solar + storage.

System goal

Your recommendation

Add appliances or pick a preset, we'll size your inverter, battery and solar array live, plus what you'd save.

Under the hood

How the calculator works.

A transparent, engineering-grade estimate, tuned for Nigerian conditions.

What we ask

  • Your energy use, build it appliance-by-appliance or enter your daily kWh directly.
  • Location, real peak-sun-hours for all 36 states + FCT (Lagos ~4.5 vs Sokoto ~6.2), which materially changes panel sizing.
  • Preferences, solar coverage, system goal, grid supply hours, battery type and panel wattage.

What we size

  • Solar array, coverage ÷ (peak sun hrs × performance ratio), with tier headroom (0/15/30%).
  • Battery, night load (~60% of daily) × autonomy days × margin, ÷ usable depth & efficiency, then expressed in kWh and Ah at your system voltage.
  • Inverter, peak load (or average draw when no peak is given) × safety factor, rounded up to whole kVA.
Estimates only. Figures are indicative (roughly 85–90% accurate under typical conditions) and blend grid and generator costs. A free Solfa site assessment, roof survey, shading and exact component selection, confirms the final design.