The Sterling Pro Sport PFC charger is a waterproof charging device that is now extremely efficient thanks to its active power factor correction (PFC). Less power is required for the same charging power. The device also has the standard proven features of the Pro Sport series and is particularly suitable for small, open boats. With its modern 3-stage charging technology (IUoUo) it can charge up to 2 battery banks, depending on the model. With reverse polarity protection (fuse). The housing is made from impact-resistant aluminium. Suitable for battery types such as gel, AGM, sealed lead-acid-and open lead-acid. Since this is a fully functional power supply, the onboard electrical system can also be operated without batteries. 12 V and 24 V.