Renogy 12V 20A AC to DC Lithium Iron Phosphate Battery Charger

Finding a charger that actually suits a lithium battery is more important than many people realise. The Renogy 12V 20A AC to DC Lithium Iron Phosphate Battery Charger is designed specifically for LiFePO4 batteries, which means it follows the charging profile these batteries require.

If your battery has entered low-temperature or low-voltage protection mode, the charger includes a battery activation function that can help bring it back into a chargeable state.

For everyday use, the charger is designed to be straightforward. It accepts a wide 100–240V AC input range at 50/60Hz, so it can be used in a variety of power environments. The included alligator clip cable makes it quick to connect the charger directly to the battery without complicated installation.

Charging performance is handled through a 3-stage charging process that includes constant current, constant voltage and trickle charging. The charger automatically detects battery voltage and adjusts the charging mode accordingly, helping to deliver efficient charging while reducing unnecessary stress on the battery. Renogy also rates the charger at up to 92% efficiency, which is useful when charging larger battery banks.

Built-in protection features

The charger includes multiple safety protections designed to help prevent common charging problems.

Short circuit protection

Helps protect the charger and battery if the output terminals are accidentally shorted.

Over-current protection

Limits excessive current that could otherwise damage components or wiring.

Over-voltage protection

Helps prevent the battery from being exposed to charging voltages above the intended range.

Under-voltage protection

Monitors for abnormal low-voltage conditions that could affect charging performance.

Reverse polarity protection

Adds protection if the battery leads are connected the wrong way around.

Status indicator lights provide a simple visual check of charging progress and fault conditions.