Last updated: July 2026
Solargrin provides free, publicly accessible calculators for planning residential and small-scale solar, battery and off-grid systems. By using this site, you agree to these terms.
Every number Solargrin produces is a planning-stage estimate based on the formulas and default assumptions described on each tool's page. Nothing on this site is professional electrical engineering advice, a substitute for a licensed installer's site survey, financial or investment advice, or tax advice. Incentive, rebate and tax credit information reflects our understanding at the time of publication and can change — always verify current eligibility with a qualified professional (electrician, tax advisor, or your local utility) before making a purchase decision.
Solargrin is provided "as is" without warranties of any kind, express or implied, including accuracy, completeness, or fitness for a particular purpose. We work to keep formulas and default data current, but we don't guarantee that any result is error-free or that it will match your actual system's performance or cost.
To the fullest extent permitted by law, Solargrin and its operators are not liable for any direct, indirect, incidental, or consequential damages arising from your use of, or reliance on, this site or its calculators.
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The design, formulas' presentation, written content and branding on Solargrin are owned by Solargrin. You're welcome to link to any page on this site. Reproducing substantial portions of our written content elsewhere without permission isn't permitted.
Don't attempt to disrupt, scrape at scale, or reverse-engineer this site's infrastructure in a way that degrades service for other visitors.
We may update these terms as the site evolves. Continued use of the site after changes means you accept the revised terms.
Questions about these terms can be sent through our Contact page.