MPPT Solar Charge Controller for 24V to 85V Battery Systems Key benefits Wide PV compatibility: Accepts photovoltaic panels with open circuit voltage from 21V to 55V and maximum power voltage from 17V to 55V, allowing use with a broad range of panel configurations. Efficient energy harvest: Builtin maximum power point tracking (tracking range 15V to 55V) optimizes panel output across changing light conditions to capture more energy than a fixedvoltage charger. Adjustable battery charging: Output battery voltage adjustable from 24V to 85V to suit different battery bank voltages and system requirements. Low standby loss: Noload power consumption is only 0.5W, reducing wasted energy when the system is idle. Simple performance monitoring: LED display shows input and output voltage and current in real time, making it easier to tune and monitor system performance. Specifications PV open circuit voltage: 21V to 55V PV maximum power voltage: 17V to 55V PV input starting voltage: 17V to 55V PV input tracking voltage: 15V to 55V PV output power: 400W Battery output voltage: 24V to 85V (adjustable) Charge current to battery: 15A Noload loss: 0.5W LED display: input and output voltage and current readouts What it does Regulates charging from photovoltaic panels to battery banks while maximizing usable panel power with MPPT tracking. Maintains the selected battery voltage and limits charge current to 15A to protect the battery from overcurrent. Provides clear LED feedback on PV and battery status to support system setup and troubleshooting. Compatibility and installation notes Designed for PV arrays whose Voc, Vmp, and operating voltages fall within the stated ranges. Intended for battery systems with nominal voltages between 24V and 85V. Suitable for installations where up to 400W of PV power is available and a 15A charge limit is acceptable. Compact enclosure for mounting in sheltered or indoor locations; follow standard electrical installation practices for wiring and ventilation. Practical applications Offgrid cabin or workshop charging a 48V battery bank from a singlestring PV array up to 400W. Remote monitoring or telecom equipment where a stable 24V to 85V battery supply is required and low idle loss extends available energy. Mobile or smallscale renewable setups such as RV, marine, or service vehicles using 24V to 48V battery systems and modest PV arrays. Why choose this unit Matches a wide range of panel and battery voltages without complex reconfiguration. Keeps idle energy loss very low while providing realtime monitoring to support efficient operation. Adjustable battery output and MPPT tracking help integrate the controller into diverse offgrid and auxiliary power systems.