Free solar calculators

What does a watt-peak
really cost?

Multi-packs, "800W" sets and foldable panels make solar prices hard to compare. Three small tools put them on equal terms — arithmetic only, no installation advice.

Compare solar panel prices Free to use. No sign-up. The maths is always shown.
01

Price per watt

Solar panel cost per watt calculator

Turn the price on the box into the price of a watt-peak: enter what you pay, the watt-peak of one module and how many modules come in the offer.

02

Yield

Solar panel yield calculator

Enter the module power and the specific yield for your location: see the kWh a year, a month and a day it adds up to.

03

Payback

Balcony solar payback calculator

Enter the set's price, its yearly yield, the share of that power you use yourself and what electricity costs you: see the yearly saving and the payback time.

Put the numbers to work

Find the cheapest watt-peak.

Our catalog ranks Amazon solar panels and balcony kits by price per 100 Wp of module power.

Compare solar panel prices
Free solar calculators: cost per watt, yearly yield, balcony payback — Solar Panel Prices