Disclaimer
Last updated: October 12, 2026
Estimates, not advice
Everything on Solar Calculator Hub — system sizes, costs, savings, payback periods and battery sizing — is an estimate for planning purposes only. It is not financial advice, tax advice, legal advice or engineering advice, and it is not a substitute for a professional site survey or a licensed installer's quote.
Incentives and tariffs change
Tax credits, subsidies, VAT relief, net metering and net billing rules, and electricity tariffs change over time and differ by state, utility and distribution company. Each calculator page stamps its figures with a "last checked" date and links its sources — but you should confirm the current rules with the relevant authority or a local professional before making decisions based on them.
No warranty
The calculators and articles are provided "as is", without warranties of any kind. While we work to keep figures accurate and sourced, we do not guarantee completeness or correctness, and we are not liable for any loss arising from reliance on this site's content.
External links
Links to official sources (IRS, government portals, utilities) are provided for verification. We don't control those sites and aren't responsible for their content.