Last updated: October 17, 2026

This page explains how Solar Water Solutions evaluates products and options related to solar water heating and other solar water solutions, and what our guides are, and are not, based on.

What our guides are

Our guides are research-based. We compare options and published specifications, explain the trade-offs that matter in real situations and say plainly who an option suits and who should look elsewhere. Unless an article explicitly describes our own use of a product, it is not a hands-on product review, and we never present research as personal experience.

Our evaluation criteria

  • Fit for the situation: whether an option matches the job, the place and the person using it.
  • Compatibility: ratings, sizes, standards and connections that must work together.
  • Safety information: published limits, certifications documented by the manufacturer and relevant official guidance.
  • Ease of use and upkeep: setup, storage and maintenance described in the manual.
  • Limitations: the drawbacks of each option and the situations where it is the wrong choice.

Our sources

We rely on the U.S. Department of Energy, certification listings such as those of the Solar Rating & Certification Corporation (SRCC), manufacturer specifications and installation manuals. When a guide states a figure or a safety point, we link to where it comes from. If we cannot verify a figure, we leave it out or describe the point qualitatively.

Ratings and scores

We do not publish star ratings or numeric scores for products. If we ever introduce a scoring system, we will publish its criteria and weighting on this page first and apply it the same way to every product.

Independence

We may earn a commission from some links, as explained in our Affiliate Disclosure. Commissions do not affect which products or options we cover or what we say about them, and we do not accept payment or free products in exchange for coverage.

Updates and corrections

We revisit guides when specifications, product lines or official guidance change and show the date each guide was last updated. If you spot an error, please contact us. Our wider standards are set out in our Editorial Policy.