Discover the Right Solar System Size for Your Home.

Use our free solar calculator to see the ideal system size for your energy needs. No stress, no guesswork, just clear guidance to help you lower your bills, boost solar performance, and reduce reliance on the grid.

Ready to upgrade? Contact us today and start powering your home smarter with a solar system that’s built to save.

Use this formula to convert the energy you want from solar (kWh/day) into a system size (kW):

Required Solar System Size (kW) =
(Desired daily output in kWh) ÷ (Peak Sun Hours × System Efficiency Factor)

Example: If you want 20 kWh/day, you have 5 peak sun hours, and you assume 80% efficiency:

Size = 20 ÷ (5 × 0.8) = 20 ÷ 4 = 5 kW
System size (kW):
Estimated panels needed:
Tip: Round panel count up to the next whole panel.
Disclaimer: The information provided in this calculator is a general guide. Actual solar requirements depend on household usage, roof layout, and more. Speak with a Stag Electrical expert for an accurate system design tailored to your home.
testimonials

What our customers say

18

Years of experience

10,000+

Installations completed

100+

Five-star reviews on SolarQuotes

Platinum Warranty Package

We pride ourselves on delivering exceptional products and services, which is why we offer our comprehensive 25-year Platinum Warranty. This industry-leading warranty goes above and beyond standard workmanship warranties, covering various components not typically included in manufacturer warranties.

With our Platinum Warranty, you can rest assured that your solar investment is well protected, giving you complete peace of mind as you enjoy the benefits of clean, renewable energy.

Workmanship (lifetime)*
Broken Tiles Repaired/Replaced*
Property Damage*
Wiring & Conduits
AC & DC Isolators
Excessive Broken Tiles*
No Call Out Fees for Warranty Repairs
Express Warranty Claims
Any At-Fault Damage Not Under Warranty
Racking, Railing, Brackets, and Clamps
Electrical Safety Certificate Provided
Warranty Documents Provided
Pre and Post Installation Photos
A picture of Stag Electrical imagery with the mention of 25 Years Platinum Certified