The Victron SmartSolar 100/30 MPPT Solar Charge Controller 12V/24V Battery is suitable for solar panels with a total power of up to 440 W (at 12V) or 880 W (at 24V). The charge controller can be easily configured and monitored via Bluetooth using an app. The ultra-fast Maximum Power Point Tracking (MPPT) significantly improves the yield from the solar cells, especially in overcast conditions. The built-in BatteryLife algorithm ensures optimal battery charging, even when the battery cannot be fully charged during a charging cycle, for example, due to shading or darkness preventing the solar panel from delivering charging power.