Alternator to Battery Chargers up to 400A


The Alternator to Battery charger (A2B) connects very simply to an existing alternator(s) and provides extremely fast and effective charge to the domestic/house bank (5+ times faster than a stand alone alternator). The A2B achieves this performance by pulling down the voltage on the alternator by putting a ‘load’ on it. This low voltage (at high current) is amplified to a 4 stage charging profile at the domestic bank. Due to the A2B’s internal splitting system there is the option to charge the starter battery too. The starter does not get advanced charging, it simply gets a sufficient maintenance charge.


Quick and Easy Installation. This charger is effective, simple and fast to install. It transforms the output of the alternator into a sophisticated multistage charger resulting in faster and more complete charging of your house / domestic battery bank.

Starter bank and domestic bank charger. This charger has an intelligent integral splitting system. The output is split to the starter bank and to the domestic / house bank. Domestic receives advanced charging.

Multiple alternator inputs. Numerous alternators can be fed to the input of the charger provided the total current rating does not exceed the charger’s rating. E.g. 400A charger can handle 4 x 100A alternators.

No alternator modification required. The charger is fitted between the alternator and battery(s) and, unlike conventional regulators, requires no modification or interference with the alternator whatsoever. This saves on time and bypasses any engine management systems (ECU) or warranty issues.

Over 5 times faster charging available output of the alternator and converts it to mimic that of a mains driven 4 stage battery charger. Consequently your batteries will charge faster resulting in less engine hours and a reduction in fuel used. This charger can therefore, pay for itself within a matter of weeks.

Largest model up to 400A (at 12V), 200A (at 24V).

Not suitable for any modern European vehicle or any vehicle equipped with an advanced ECU. For suitable products – look to the range of Regenerative Braking Friendly devices – the Battery to Battery Charger.

Alternator to Battery chargers

DC (V) Max Alt size (A) Size L x W x D mm Weight kg Code
12V 80A 270 x 180 x 80 2.5 AB1280
12V 130A 270 x 180 x 80 2.5 AB12130
12V 300A 370 x 288 x 70 5.0 AB12300
12V 400A 370 x 288 x 70 5.1 AB12400
24V 80A 270 x 180 x 80 2.5 AB2480
24V 200A 370 x 288 x 70 5.2 AB24200
Remote control ABNRC
12V 160A 250 x 280 x 70 3.5 AB12160
12V 210A 250 x 280 x 70 3.5 AB12210
12V 100A 250 x 280 x 70 3.5 AB24100
Remote control ABRC
Power Variant

12V 160A AB12160, 12V 210A AB12210, 24V 100A AB24100, 12V 300A AB12300, 12V 400A AB12400, 24V 200A AB24200, Remote for AB12300 AB12400 AB24200 (ABNRC), Remote for AB12160 AB12210 AB24100 (ABRC)