4W Monocrystalline Ring Charger

This 4W solar charger utilises monocrystalline silicon technology with 21.8% module efficiency and PET lamination for longevity and consistent output. It supplies regulated 5V power compatible with Ring Video Doorbell 4, 3, 3 Plus and 2 (battery range: 3V–5V), delivering up to 700mA working current and operating across 0°C–50°C. Equipped with a 3m cable and 3.2mm fork connector, it connects seamlessly to the Ring doorbell’s solar port. The included mounting bracket allows secure, adjustable installation on common UK building substrates—including rendered walls, timber cladding and brickwork. Unlike generic ‘universal’ solar panels, this unit incorporates Ring-specific current-limiting circuitry that mimics the behaviour of the official Ring Solar Charger—ensuring accurate battery level reporting in the Ring app and eliminating phantom ‘low battery’ warnings triggered by unstable voltage sources. Field-tested across 12 UK postcodes over 18 months: maintains ≥92% of original output after 12 months of continuous exposure—outperforming 7 of 10 comparable EU-sourced panels that showed >15% degradation due to yellowing PET or solder joint fatigue.