Batteries and Backup
Home Battery Size Calculator: kWh and kW for Your House
Enter your loads and outage length to get the usable kWh you need, new and at the warranty floor, plus the kW…
Tools
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Sizing and OutputHow Many Solar Panels Do I Need? Calculator and the Math
About 14 to 23 panels of 430 W cover an average US home's 863 kWh a month, depending on location. A Texas-average…
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Worth It and CostsSolar Payback Calculator: With or Without a Battery
With no federal credit, our Phoenix-area example (7.7 kW at $3.00/W on APS's export rate) pays back in about 19.8 years; a…