System Design
Sizing a system for your home — how many panels you need, whether to add a battery, and if your roof is a good fit.
- GuideHow to Size a Solar System (Step-by-Step)Sizing solar comes down to your annual usage, local sun, and goals. Here's the step-by-step method to estimate the right system size — in kW and number of panels.
- GuideSolar Inverters Explained: String vs MicroinvertersThe inverter converts your panels' power for home use. String inverters are cheaper; microinverters handle shading better and last longer. Here's how to choose.
- GuideDo I Need a Solar Battery? (Storage Guide for 2026)A solar battery stores power for night and outages — but it's a big added cost. Here's when a battery is worth it in 2026, when it isn't, and how to decide.
- GuideWill Solar Work on My Roof? (Direction, Shade, and Roof Type)Not every roof is a good fit for solar. Here's how roof direction, shade, pitch, age, and material affect whether — and how well — solar will work on your home.
- GuideHow Many Solar Panels Do I Need for My Home?A simple way to estimate how many solar panels your home needs, based on your electricity use, your local sun, and panel wattage — with a worked example.