TECMATE Duo Solar Charge Controller TM522-D

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