OptiMate Solar DUO, the smart 5 Amp solar controller that safely charges all types of 12V batteries – fully automatic ‘connect & forget’ technology!
Works with 12V polycrystalline or mono-crystalline solar panels, with rated output from 10W to 60W.  
Solar Panel specifications  
Charges 12V lead-acid + 12.8V / 13.2V lithium batteries.
The smart charge controller automatically adjusts charge according to battery type and condition – Connect to the battery and the OptiMate Solar DUO controller does the rest, no supervision required!
The fully automatic multi-step program brings the battery safely to full charge and continues to maintain the battery daily – Charger by day!
 Battery’s state of charge is displayed on the LED panel 24-7 – Monitor by night!

The controller kit includes premium quality components 1) OptiMate Solar DUO controller 2) O-27 SAE polarity converter 3) O-01 battery lead 4) O-04 battery clips – for the complete solar charging experience!
How to connect the controller to your solar panel and battery
 

More features:

Converts low solar energy to efficient pulse charge.

DAY: Charge & maintain. NIGHT: monitor charge level.

Safe to leave connected. Full electronic protection.

Saves your ‘dead’ battery from as low as 4V.

√ Efficient dual conversion.
√ Low power use.

Weatherproof! Rated for use down to -20°C / -4°F.