https://straightwatt.com/solar/ US solar economics, computed from published data. Every figure carries the source it came from and the date it was read. en-us Sat, 05 Sep 2026 00:00:00 GMT https://straightwatt.com/solar/what-old-calculators-get-wrong/ https://straightwatt.com/solar/what-old-calculators-get-wrong/ Sun, 06 Sep 2026 00:00:00 GMT A dated survey of public tools, the four error classes with the size of each, and a checklist for auditing any calculator - including ours. https://straightwatt.com/solar/battery-2026/ https://straightwatt.com/solar/battery-2026/ Sat, 05 Sep 2026 00:00:00 GMT Where storage changes the maths and where it does not, with the assumptions in the open. https://straightwatt.com/solar/cost-2026/ https://straightwatt.com/solar/cost-2026/ Sat, 05 Sep 2026 00:00:00 GMT Two price bases, by state and by bill, and why they are 60% apart. https://straightwatt.com/solar/is-it-worth-it-2026/ https://straightwatt.com/solar/is-it-worth-it-2026/ Sat, 05 Sep 2026 00:00:00 GMT With no federal credit for buyers, the answer turns on your rate, your export rule and your state - not on how sunny it is. https://straightwatt.com/solar/lease-vs-buy-2026/ https://straightwatt.com/solar/lease-vs-buy-2026/ Sat, 05 Sep 2026 00:00:00 GMT The three ways to pay, run on the same house, year by year, in every state we publish. https://straightwatt.com/solar/payback-2026/ https://straightwatt.com/solar/payback-2026/ Sat, 05 Sep 2026 00:00:00 GMT How it is computed, what moves it, and the state ranking - rate beats sunshine. https://straightwatt.com/solar/state-incentives-2026/ https://straightwatt.com/solar/state-incentives-2026/ Sat, 05 Sep 2026 00:00:00 GMT Which states still pay a buyer, what they pay, and where there is nothing - each from its own source. https://straightwatt.com/solar/tax-credit-2026/ https://straightwatt.com/solar/tax-credit-2026/ Sat, 05 Sep 2026 00:00:00 GMT Gone for buyers, still 30% for leases. What ended, what survives, computed and cited.