How many solar panels do I need in Kenya?

It depends on your daily consumption and your area's full sun hours. Nairobi averages around 4.8 peak sun hours; divide your adjusted daily watt-hours by (sun hours × system efficiency) to size the array.

What battery capacity do I need for off-grid solar?

Multiply your adjusted daily load by your days of autonomy, then divide by the depth of discharge and system voltage. Our calculator recommends standard LiFePO4 bank sizes automatically.

How much does a home solar system cost in Kenya?

Typical residential systems range from about KES 80,000 for small setups to KES 1M+ for large hybrid installations, depending on battery capacity and array size. Use our calculator for an instant estimate.

Solar PV System Calculator

Estimate off-grid, hybrid, or grid-tie solar systems. Get instant recommendations and KES cost estimates.

System Architecture

System Type Off-grid: fully independent system with separate components

Enter each appliance individually for precise sizing.

Average Monthly Electricity Bill (KES) Your average bill from Kenya Power/other utility

Cost per kWh (KES) Check your bill - typically 25-30 KES/kWh

Quick Add Common Appliances Choose common appliances to auto-fill values

Appliance Load Inventory

Device Name Watts (W) Qty Hrs/Day Surge × Type

Location Settings

Your Location (Kenya) Select your town for automatic Full Sun Hours recommendation

Full Sun Hours (FSH) Typical range: 3–6 hours depending on location and season

Seasonal Adjustment Calculates using annual average irradiance

Battery Configuration

System Voltage

Days of Autonomy Days battery should last without solar recharge (1–2 recommended)

Max Depth of Discharge (DOD)

Efficiency Settings

Inverter Efficiency (%) Hybrid inverters: ~96%. Standard inverters: 85-90%

PV String Cable Run (metres, one-way) Distance from the solar array to the charge controller / inverter. Typical rooftop installs: 20–50 m

Main DC Cable Run (metres, one-way) Measure the battery-bank-to-inverter distance on site

Derating Factor (Soiling, Temp, Cable Losses) Covering dust, temperature effects, and wiring losses (typically 0.75-0.85)

Electricity Tariff (KES per kWh) Used to estimate monthly savings and payback period

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Your Solar System Recommendation

Daily Consumption
(Wh)

Battery Capacity
Ah @ 24V)

Solar Array
(Wattage)

Backup Days
(Available)

Peak Power Demand (W)

System Voltage (V)

Energy Breakdown

DC Load:-

AC Load:-

Inverter Losses:-

Cable Losses:-

Total Adjusted:-

Battery Bank

PV Array

Charge Controller

Inverter

PV String Cable

Main DC Cable

Itemised Project Cost (KES)

Total Project Cost: -

ℹ️ Includes major equipment, accessories, installation labour, 10% contingency and 16% VAT. Estimates based on Kenyan market rates (Q3 2026). Contact us for a firm quotation.

Est. Monthly Savings:-

Simple Payback:-

Quote Reference:-