What do you want to size?
Choose the path that best matches the information you already have.
This tool gives an early estimate. Final design depends on a verified load schedule, site conditions, equipment specifications and the selected inverter and battery brands.
What should your home system power?
Add only the appliances you want the solar system to support. Edit any wattage when you know the exact rating.
Tell us about your business power needs
Start with your business type and power supply, then choose whether to enter a known total load or estimate it by equipment category.
Do you know your total running load?
Enter your load information
Enter only loads that must remain powered during an outage.
Motors, pumps, compressors or other high-startup loads
Add your business loads
For each category, enter quantity, wattage, day and night runtime, and whether it is critical or has high startup current.
What do you want the system to do?
Your goal determines how much energy should come from solar and how much battery storage is needed.
Choose your display preferences
These options change how the estimate is presented. Final battery voltage and panel model should be confirmed during technical design.
Preferred battery system voltage
Panel wattage
Calculation assumptions
- Kenya solar resource assumption: 5 peak sun hours per day.
- General sizing and loss factor: 1.3.
- Battery estimate is based on critical connected load × requested backup hours × 1.3.
- Motor and compressor startup estimates use the selected multiplier, but final sizing must use equipment nameplate and starting data.
- Results are rounded up to practical inverter sizes and whole solar panels.
Inverter estimate
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Solar PV estimate
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Battery estimate
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Daily energy
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Load and energy summary
Running / connected load—
Critical backup load—
Daytime energy—
Night-time energy—
Design interpretation
System purpose—
Power supply—
Panel arrangement—
Technical review—
Important: This calculator provides a preliminary estimate only. It is not a final engineering design or quotation. Final sizing requires verification of appliance or equipment ratings, startup current, phase arrangement, operating profile, battery and inverter specifications, roof or ground space, cable routes, protection requirements and site conditions by a qualified EPRA-licensed solar professional.
Get a proper quote from our team
Share your contact details. Your calculator result will be included automatically in the WhatsApp enquiry.
I want a solar quotation
I want a site assessment
By submitting, you agree that SheSpeaksSolar or its solar solutions team may contact you about this enquiry.
info@shespeakssolar.com · +254 743 475 752