SolarSizer Pro

Design Solar Systems Right.
Quote Clients Professionally.

Professional solar sizing, engineering checks and branded quotations for technicians and installers.

Built for solar technicians, installers and electrical contractors.

Workflow

From Client Load to Professional Quotation

  1. 01
    Survey
    Client, roof, supply, shading
  2. 02
    Loads
    Appliances, hours, surge
  3. 03
    Solar Design
    PV, battery, inverter
  4. 04
    Engineering
    Strings, cable, roof
  5. 05
    Options
    Economy · Recommended · Premium
  6. 06
    Quotation
    Branded PDF proposal
Capabilities

Engineering a technician can stand behind

Load assessment

Watts × qty × hours × duty cycle, essential vs non-essential.

PV sizing

Panel count and kWp from peak sun hours and performance ratio.

Battery autonomy

Nominal and usable kWh and Ah from autonomy, DoD and efficiency.

Inverter & surge sizing

kVA with design margin, power factor and motor surge.

PV string / MPPT validation

Cold Voc, hot Vmp and current against inverter limits.

Cable voltage drop

PV and battery runs checked against your drop limit.

Roof fit

How many modules your roof can physically take.

Protection guidance

Breakers, fuses, isolators, SPDs and earthing — flagged VERIFY.

Why technicians use it

Less guesswork on site. More confidence in the quote.

Faster surveys

Quick-add appliances and saved defaults on your phone.

Fewer sizing mistakes

Impossible inputs are rejected before they reach a client.

Transparent calculations

Every formula and assumption is visible and editable.

Better client confidence

Three clear options with an engineering status on each.

Professional documentation

A clean A4 proposal with load schedule and BOM.

Get a company-branded quotation

Add your logo, details, terms and signature once — every quote then prints as your own PDF.

Pricing

Free to start. Upgrade when the jobs come in.

Four plans in KES, from Free to Business. Every plan keeps the same engineering, and your existing projects and quotations always stay viewable.

See plans & pricing

Frequently asked questions

Pages are lightweight and work well on mobile data. Work is saved to the cloud when you press Save, so keep a connection for saving; full offline mode is on the roadmap.

Start your first solar design free.

No card needed. Set up your company in under two minutes.

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