Most of the Multiplus Victron Inverters listed here are also able to perform as Battery Chargers when connected to a generator or any other AC power source, this feature not only saves wall space on your system switchboard but it saves you from needing to buy a separate battery charger. The "A" or amp rating number beside the product name, say 70A, indicates the maximum DC amperage charge rate going into your batteries, this figure can be set lower as required.