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Size
Browse 8 in-depth Size guides from Solar Planner Guide. Our editorial team researches and writes each one to give you clear, practical answers, current as of August 2026. The newest are shown first.
How to Size Your Solar System When the ROI Math Has Changed
If you’ve been sitting on a solar quote for the last year or two, waiting to see what happened with …
Size Your Solar Battery Bank The Right Way
The first time I sat down to size a battery bank for my own home, I stared at my utility bill for about twenty …
Calculate Your Solar System Size Perfectly
Most solar calculators are built by installers who want to sell you a system. That’s not a conspiracy …
How to Size a Solar System When Exporting Power Pays Almost Nothing
If you’ve been getting quotes for solar lately, you might be wondering why the numbers don’t seem …
Solar ROI Without the Tax Credit: How to Size Your System Now
A homeowner in Orlando told me last month she was about to sign a contract for a 10-kilowatt system, then her …
Solar Leases and PPAs Are Back: How to Size for a Third-Party System
The 30% federal tax credit that defined residential solar for thirty years is gone. The One Big Beautiful Bill …
How to Size a Solar System When the Tax Credit Is Gone
If you’re staring at a solar quote right now, the math probably feels off. The 30% federal residential …
How Much Solar Power Your 2000 Sq Ft Home Actually Needs
Square footage is almost irrelevant when sizing a solar system. I know that’s not what you were hoping …