Affiliate disclosure
Solar Backup Lab is reader-supported. This page explains exactly how, in plain terms, in line with the US Federal Trade Commission's guidance on endorsements and the Amazon Associates Operating Agreement.
The short version
Which links
Any link labelled "Check today's price" or otherwise pointing to a retailer is an affiliate link. They carry rel="sponsored nofollow" so search engines can identify them as paid placements. Links to manufacturer specification sheets, cited as sources, are not affiliate links and earn us nothing.
What commission does not buy
- It does not decide which products we cover.
- It does not change a specification, a calculated runtime, or a stated drawback.
- No manufacturer has paid us, supplied us with hardware, or reviewed a page before publication. If that ever changes, it will be disclosed on the page in question, prominently, before the content.
What we cannot promise
We do not track prices or stock. Retail prices change daily and any price we printed would be wrong within a week, so we link you to the live listing instead. Availability, shipping and warranty terms are between you and the retailer.
Not professional advice
The runtime figures on this site are calculations intended to help you plan, not engineering guarantees. For anything life-critical — medical equipment above all — follow the device manufacturer's guidance and keep a backup that does not depend on our arithmetic. See our methodology for how the numbers are produced and where they are uncertain.