Goal Zero Guardian 12V Charger & Nomad 13 Combo -
Pair the GOAL ZERO Guardian 12V Charger with GOAL ZERO's Nomad 13 Solar Panel for a self-sustaining charging cycle. Overcharging a 12V battery dramatically decreases its lifespan. But you can avoid this costly mistake by inserting the Guardian 12V Charger between your battery and the Nomad 13 Solar Panel. This small, easy-to-use device will keep 12V batteries healthy and fully charged.
Manufacturer model #: 44003.