Contrary to popular belief, solar panels do not actually power navigation lights. The purpose of the solar panels is to recharge a battery or bank of batteries during the day —which, in turn, powers the light during the night.
Fitting the correct size of solar panel and battery is very important. The batteries must be sized to allow the light to operate for several days, even when there is little or no solar input in the winter months. Normally a reserve capacity of 30 days is allowed, but this is usually reduced for fixed lights such as jetty lights.
Solar regulators are another important part of a solar-powered system, as they control the power output by the solar panel and safely charge the battery.
Hydrosphere offers a range of sealed deep-cycle batteries and regulators to suit the needs of a solar-powered or battery-backed mains system.