Hey Product Hunt community! 👋 Most residential solar calculators on the web today share two major flaws: 1. They force you through an aggressive phone/email lead-capture wall before showing any numbers. 2. They rely on outdated 1:1 net metering math that completely ignores modern grid regulations like California NEM 3.0. We built **SolarSavingsHQ** to provide a fast, 100% free, and transparent clean energy financial engine: ⚡ **Instant Client-Side Physics**: Sizing calculations adhere to NREL PVWatts v8 standards (0.80 system derate factor). 🔋 **NEM 3.0 & Battery Arbitrage**: Models how home lithium battery storage captures peak evening time-of-use rates. 💰 **25-Year Compound Financial Trajectory**: Factors in 3.0% annual utility electricity inflation against 0.5% annual photovoltaic panel degradation. ☀️ **11-State Solar Heatmap**: Visualizes 12-month solar irradiance variance and regional tariffs. Would love to hear your feedback on the calculation models and UI!

SolarSavingsHQ

Free, client-side solar ROI & NEM 3.0 battery estimator

Free, client-side solar ROI & NEM 3.0 battery estimator