Description
If you’re storing a vehicle between seasons or maintaining a battery during extended downtime, the TECMATE Duo Solar Charge Controller TM522-D delivers reliable, hands-free charging powered entirely by the sun. This intelligent system separates the solar panel from the smart charger, giving you real-time battery condition monitoring exactly where you need it—at the battery itself. By converting low-power solar output into high-current pulses, it charges and maintains lead-acid and lithium batteries far more effectively than passive solar trickle chargers.
Key Technical Features:
- 12V battery charging system
- Converts solar to pulse current
- 14 feet cable separation
- SAE-to-SAE connectors
- Weatherproof controller case
- Standard battery clip set
- Compatible: EFB, STD, AGM, gel
- Battery capacity: 2Ah–240Ah
- Operates down to -4°F
- Low-voltage start: 1V
- Supports lead-acid batteries
- Supports lithium batteries
- 24/7 autonomous operation
- MPN: TM522-D


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