Use our interactive calculator to estimate the ideal solar PV system size for your home or small business. Pick your location on the map, enter your energy usage, and get an indicative system sizing report.

1. Your Location & Energy Needs

Click on the map to drop a pin at your site, or select your county from the list. Then tell us how much energy you use each month.

County / Region (Kenya)

Loading map…

Map could not be loaded. Please select your county from the dropdown above.

No location selected

Peak Sun Hours (PSH) kWh/m²/day. Auto-filled from map/county; you can override.

How do you want to enter your usage?

Monthly kWh Monthly bill (KES)

Monthly electricity use kWh per month (check your power bill).

Monthly electricity bill KES per month.

Electricity tariff KES per kWh (default is typical Kenyan rate).

Property type

Home Small Business

2. Site & System Details

Tell us about your roof and the kind of solar system you want.

Roof direction (azimuth)

Roof tilt / slope

System losses

System type

Backup hours needed

Battery depth of discharge

Panel wattage

3. Your Recommended Solar System

Based on the information you provided, here is an indicative system sizing estimate.

—

Solar array size

—

Solar panels

—

Inverter size

—

Battery storage

—

Est. annual production

—

Indicative cost

What this means

Complete the calculation to see your recommendation.

Estimated Monthly Production

Production Surplus (above usage) Deficit (below usage)

Assumptions & notes

Peak sun hours are an annual average for your selected location.
System losses include temperature, inverter efficiency, wiring, soiling and shading.
Costs are indicative only; actual quotes depend on equipment brands, installation complexity, and site survey.
This calculator is a planning tool, not a substitute for a professional engineering design.

MAJISOLAR

Solar System Sizing Report

—

Project Details

Property type	—
Location	—
Coordinates	—
Monthly energy use	—
Peak sun hours	—
System type	—
Roof direction	—
Roof tilt	—

Recommended System

Solar array size	—
Number of panels	—
Panel wattage	—
Inverter size	—
Battery storage	—
Estimated annual production	—
Indicative system cost	—

Summary

—

Solar System Sizing Calculator