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Stay across the benchmark.

One email when the data moves: a new scorecard, a score change, or a flag worth knowing before it reaches your warranty. No fixed schedule, no filler.

What lands in your inbox

New scorecards

Every solar panel, home battery and inverter as it's tested and scored out of 100 on the published methodology.

Score changes

When a rating moves or the rubric is revised, you get the new number and the sourced reason it changed.

Corporate-status flags

Financial distress, brand exits and recalls that put a warranty at risk, surfaced against the products they affect.

Findings

The occasional deep dive: the data behind a market shift, read in full, every figure sourced.

Recently published

Balance of system · August 2026Two Sigenergy battery controllers will share one model name. Only one of them takes the new accessory.5 min readCorporate · August 2026Tesla's solar panel really is 20.5 per cent efficient. What moved is the factory, not the datasheet.6 min readSustainability · Living benchmarkA panel outlives its warranty by design. Not every maker has published where it goes next.7 min read

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