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Independent explainers on the tradeoffs that actually matter: panel technology, battery chemistry, and inverter choice. Each guide is written and maintained by Stephan Kulik and cites primary sources (NREL, DOE, BloombergNEF, manufacturer datasheets).
Sizing
Step-by-step sizing method with state-level sun-hour tables — from monthly bill to panel count in 4 steps.
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Panels
Efficiency, cost, temperature performance, and TOPCon/HJT explained for US homes.
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Batteries
Safety, cycle life, UL 9540A, and density. What most US homes should pick.
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Inverters
When to pick each inverter type. Shading, NEC rapid shutdown, and battery-readiness.
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Looking for product comparisons instead? See solar panels, batteries, inverters, or use the system configurator for an end-to-end recommendation.