Concept Drafts › Free tools › Solar panel and battery size calculator
Solar panel and battery size calculator
How many panels and how much battery you need for your daily energy use.
Results
Find your peak sun hours from a solar map for your area. Losses cover heat, dust, wiring and the inverter; 20 to 30% is typical. A licensed electrician or solar installer must design the real system.
Stop working out one number at a time
A calculator is a quick check. A concept draft works these numbers out together with specs, drawings, a priced parts list, build phases and the rules to check, and updates them all when you change something.
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Battery run time and range calculator
How long a battery runs a motor or load, and how far you'll go at a given speed.
Board feet and lumber cost calculator
Board feet and cost for hardwood or lumber, with a waste allowance.
Concrete for a slab or footing calculator
Cubic yards of concrete and the number of bags for a slab, pad or footing.
DC wire size (voltage drop) calculator
The smallest copper wire size that keeps voltage drop under your limit on a DC run.
Build budget with contingency calculator
A realistic total for any build: parts, labor, permits, a contingency and tax.
Estimates for planning only. Have a qualified professional confirm sizes before you build.