TecMate Duo Solar Charge Controller The TecMate Duo Solar Charge Controller masterfully maintains 12V batteries with solar power precision. It smartly places its pulse charger close to the battery for instant health checks, rapidly converting solar inputs to robust charging pulses to ensure optimal battery upkeep. Features: Converts the low power from the solar panel (sold separately) to high current pulses for more effective charging and maintenance of a 12V battery 124'' of cable separates the charger from the panel, with SAE to SAE interconnection providing the option of extending further Standard battery clip set, weatherproof charge controller case and battery lead included Ideal for Efb, Std, AGM and gel 12V batteries from 2-240Ah Can withstand temperatures down to -4F For lead-acid and lithium batteries Low-volt start of 4V