๐ฐ Solar Payback & Savings
Answer "is solar worth it for me?" in 30 seconds โ payback period, 25-year profit and the system size you actually need.
Self-consumption = the share of solar you use yourself (the rest is exported or cut). With a battery this goes to 80-90%. Sun hours: N-Europe ~2.5, S-Europe ~4.5, Australia ~5, US Southwest ~5.5.
Payback period
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Positive numbers? Get real quotes.
Submit one requirement on TUNA โ verified suppliers quote panels, inverters and storage.
Request Quotes on TUNA โModel: annual generation = kWp ร sun hours ร 365 ร 80% performance ratio, output degraded 0.5%/yr, 25-year horizon, electricity price held flat (conservative โ usually prices rise).