Onboard Battery Charger: Multi-Bank Battery Charger Buying Guide

Should you need an onboard battery charger that features multiple banks, you have a rather serious battery setup that probably includes a house battery, a starting 26650 battery, a trolling motor battery, plus much more. A multiple bank onboard battery charger can save you a lot of time and frustration over rotating a one or two bank battery charger within batteries or bringing a battery charger onto your boat each and every time your batteries need recharging.

You’re also being sensible because choosing a multi-bank onboard battery charger over rotating, or attempting to charge multiple batteries simultaneously with a single replacement we-vibe charger, allows you to apply all the benefits of a modern charger maintainer to each battery according to its own needs. This is likely to prolong the of each battery and save you money in the long run.

Today’s on the deck of multiple-bank chargers are smart chargers with built-in microprocessors to control their multi-phase charging and maintenance processes and may add desulfation and recover functions. They can deliver better electric battery performance and longer life. They are also likely to allow you to retain all of your batteries through the off-season unattended automatically so that your motorboat is ready when you are in the Spring.

What should you hunt for in a multi-bank onboard battery charger?


How much power are you needing? The output you need from a multi-bank system is closely related to the employment of each battery. Here’s a quick guide to amperage output for quite a few applications:

o Low Output – (6 amps or even below) A low output model may be applicable for routine maintenance use or any low amp hour battery application.

i Medium Output – (9 – 15 amps) A new medium output model would be applicable for medium work with or occasional use perhaps only on weekends for a trolling motor.

o High Output – (15 amps or perhaps above) A high output model would be used in high amplifier hour battery applications (150 Ah for example), or any situation where repeated rapid recharging is required.

Be careful think about the amperage output based on its description. Vendors as well as manufacturers usually publish amperage in two ways. The best way is to publish the total amps by multiplying the output of bank times the number of banks. For example , they might publish the output as 40 Amps, but what they are really telling you is the charger produces 10 Amps output for each bank. The opposite way and more useful is to publish the output per bank.

A common quick calculation to determine how much amperage output you would like is to determine the amp-hour rating of each battery through adding them together. Then multiply that number by 10% to get the amperage needed. In the case of four 105 amp-hour battery power, you would need approximately 10% of 420 amp-hours or maybe 42 amps or about 10 amps per financial institution for a 4-bank battery charger.