Compare panels by $/W, batteries by $/Ah, and power stations by $/Wh. Free tools calculate your exact system. AI advisor answers every question.
Price drop alerts, new product launches, and our expert buying guides. No spam, ever.
PurelySolar earns affiliate commissions on qualifying purchases. Prices updated regularly — verify on retailer site before purchase. Products sorted by objective value metrics only.
Built on real engineering math, not simplified estimates. Get numbers you can actually build with.
Add appliances, pick location, get exact panel + battery + controller recommendations with live price picks from our database.
Enter electricity rate, system cost, location, and incentives. Get exact payback year, lifetime savings, and annual chart with degradation.
Ask anything. Sol knows the full product database, gives specific recommendations with links, and explains solar concepts clearly.
Calculate exact Ah needed. LiFePO4 vs AGM comparison with real DoD math, cycle life cost comparison, and specific product picks.
Pick any panel, auto-match compatible charge controller, battery, inverter, and wiring — all electrically verified and affiliate-linked.
Enter system voltage and amps. Get NEC-compliant wire gauge, breaker size, and fuse rating. Prevents fires from undersized wiring.
Set a target $/W for any panel. Get emailed the instant it drops below your threshold on Amazon or any tracked retailer.
Enter any US zip code and get real NREL irradiance data — exact peak sun hours per day and month. Know before you size.
Enter dimensions, get maximum panel count, total wattage capacity, and estimated daily output for your specific location.
Tell us what you want to power. We calculate exactly how many panels, what size battery bank, and which charge controller — with live picks from our price database.
See your exact payback year, lifetime savings, and year-by-year performance — adjusted for panel degradation and electricity rate increases.
| Chemistry | Price (100Ah 12V) | Usable Cap. | Cycle Life | Batteries in 10yr | 10yr Total Cost |
|---|---|---|---|---|---|
| LiFePO4 (LiTime) | $159 | 960Wh (80%) | 4,000 cycles | 1× | $159 ✓ Best |
| AGM (Weize) | $89 | 600Wh (50%) | 300 cycles | 13× | $1,157 |
| LiFePO4 (Battle Born) | $949 | 960Wh (80%) | 3,000 cycles | 1× | $949 |
PurelySolar started from one frustration: every solar website is designed to get you to call an installer. We wanted the opposite — a tool that gives real, detailed information to people building their own systems.
Our comparison tables are sorted by objective metrics: $/W for panels, $/Ah for batteries, $/Wh for power stations. Never by commission rate. Our tools use real engineering formulas — 80% system derate, actual DoD limits, NREL sun hour data.
We're affiliate-supported. When you click through and buy, we earn a small commission at no extra cost to you. This funds the site and keeps everything free. It never changes how we rank products.
Questions, partnership inquiries, or found a price error? Reach us at hello@purelysolar.com