Affiliate Disclosure

Last updated June 5, 2026

SolarControllerFinder is free to use. It stays free because some of the buy links on the site are affiliate links. This page explains exactly how that works, consistent with the U.S. Federal Trade Commission's endorsement guidelines (16 CFR Part 255).

What an affiliate link is

When you click certain buy buttons — to merchants like Amazon, Renogy, or Signature Solar — and then purchase, we may earn a referral commission. It costs you nothing extra; the price is the same whether you use our link or go direct.

Programs we participate in

These include the Amazon Associates program (as an Amazon Associate we earn from qualifying purchases) and affiliate programs run through networks such as Impact, plus direct merchant programs. The specific partners change over time.

The non-negotiable line

Advertisers can pay for placement, but never for compatibility. This is the rule the entire site is built around. Our rules engine decides whether a charge controller is compatible with your panels and battery using physics and NEC code — it has no idea which vendors pay us. What an affiliate relationship can influence is which vendor's link appears as the primary buy button for a product that's already compatible. It can never flip an incompatibility flag to "compatible."

A controller with no affiliate program at all (Victron, for example, doesn't pay anyone) shows up and ranks exactly the same as brands that do pay. Recommendations would be identical with zero affiliate revenue.

Why we tell you

The FTC requires clear disclosure of material connections, and we agree with it. More importantly, the whole value of a compatibility tool collapses the moment you suspect it's steering you for a commission. So we over-disclose, and we disclose on the individual product listings too. More on our independence is on the About page.