Smart solar sizing

Solar systems,
sized in seconds.

Input your appliances. Get exact panels, batteries, inverter, and controller specs. Compare off-grid, hybrid, and budget designs without waiting for a salesperson.

Calculate yoursSee how it works

What is inside

Built for engineers.
Designed for first-timers.

Every calculation a working solar engineer would run, packaged for someone shopping for their first system or qualifying a lead.

Eight calculation steps, run for you.

Daily load, peak load, irradiation lookup, derating, panel sizing, battery sizing, inverter sizing, and controller sizing in one flow.

01 - Daily load26.86 kWh
02 - Peak load3.36 kW
03 - Irradiation4.5 h/day
04 - Panel array14 x 550 W
05 - Battery bank20 x 12 V
06 - Inverter5 kVA
07 - Controller161 A

Solar data for 55+ cities.

Location-specific peak sun hours replace broad continental assumptions.

Fast enough for first conversations.

No sign-up wall before sizing, comparing, or printing your first estimate.

Three designs side by side.

Compare full independence, grid-assisted backup, and essential starter systems.

Built for phone-first use.

Panels, inputs, summaries, and actions hold their shape across small screens.

Connect the finished spec to an installer quote.

Capture the selected system type, city, phone number, and project notes so the conversation starts with actual sizing data.

How it works

Three steps.
Under a minute.

01 - Inventory

Add your appliances.

Pick from presets or add a custom device, then set quantity and daily usage.

02 - Location

Set your city.

Auto-detect or type a city so the sizing engine can use local sun-hour data.

03 - Output

Compare designs.

Review panels, batteries, inverter, controller, load, and autonomy in one result set.

By the numbers

Sized for the way
power is actually used.

55+Cities with irradiation data
30+Appliance presets
3Comparable system designs

Ready to size yours?

Open the calculator, add your appliances, and get a complete first-pass design.

Open the calculator