How this site is funded

As of 6 October 2026, Solar Power Auditor:

• bought every unit it has tested at retail, with no free, loaned or discounted hardware from any manufacturer;
• is not a member of the Amazon Associates programme or any other affiliate programme;
• earns no commission from any link on this site;
• carries no display advertising of any kind;
• has no sponsored posts, paid placements, paid reviews or brand relationships.

There is no revenue attached to this site at all right now. That's an unusual thing to publish, so I'd rather publish it than have you assume the opposite.

A unit sent free by a manufacturer is often a unit the manufacturer chose to send. Buying at retail means I test what you'd get. It also means I can be as blunt as the measurements require: when a unit came in 10 dB louder than its published noise figure, or delivered the smallest share of its rating on my bench, the review says so.

Because a reader who has decided which unit they want shouldn't have to go and find it themselves.

Each product button goes to Amazon. Where I've confirmed the exact product listing, the button goes straight to it. Where I couldn't confirm the right listing with confidence, the button goes to an Amazon search for that product name instead. Several products in this category share near-identical names (EcoFlow sells three different 1,024 Wh units called Delta 3), and a search box is safer than a link to the wrong one.

These links carry rel="nofollow" and open in a new tab. They carry no tracking tag, because I don't have one.

If that changes, all of the following happen at the same time, before any commission is earned:

1. This page is rewritten to say so, with the date.
2. The notice at the top of every page changes to disclose the commercial relationship.
3. Every affected link gains rel="sponsored nofollow", and the programme's required disclosure appears site-wide.
4. Existing scores are not revisited. The rubric, the bench results and the hands-on ratings don't change because the funding did.

The site is built so this is a single configuration switch, and the build refuses to publish if the disclosure language and the actual link behaviour disagree.

• Accept payment to review, feature, rank or score a product.
• Accept free or loaned hardware without disclosing it on every page where that unit appears.
• Let a commercial relationship change a score, a ranking or a verdict.
• Run display advertising, pop-ups, or newsletter list rental.
• Publish a "best of" list ranked by anything other than the published scoring method.

Every price used in a score, a table or a cost-per-watt-hour figure is the manufacturer's own list price on the date I checked it. I don't track street prices, and prices in this category move constantly, so a sale price published last month could be wrong today without you knowing. Where a unit is routinely sold below list, I mention it in the text, but I don't build scores or comparisons on it. For what you'll actually pay, check the retailer.

If anything here is unclear, or you think I have a conflict of interest I haven't declared, tell me and I'll publish the answer.