Onboard Battery Charger: Multi-Bank Battery Charger Buying Guide

If you would like an onboard battery charger that features multiple banks, you have a really serious battery setup that probably includes a house solar battery, a starting battery, a trolling motor battery, and many more. A multiple bank onboard battery charger can save you a lot of time and also frustration over rotating a one or two bank battery charger among the batteries or bringing a battery charger onto your boat when your batteries need recharging.

You’re also being brilliant because choosing a multi-bank onboard 18650 Battery charger over-rotating, as well as attempting to charge multiple batteries simultaneously with a single charger, allows you to apply all the benefits of a modern charger maintainer with each battery according to its own needs. This is likely to prolong the relationship 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 also include desulfation and recover functions. They can deliver better battery performance and longer life. They are also likely to allow you to manage all of your batteries through the off-season unattended automatically so that your sail boat is ready when you are in the Spring.

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


How much power are you wanting? The output you need from a multi-bank system is closely related to using each battery. Here’s a quick guide to amperage output for those applications:

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

occasions Medium Output – (9 – 15 amps) Your medium output model would be applicable for medium apply or occasional use perhaps only on weekends for a trolling motor.

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

Be careful finding the amperage output based on its description. Vendors along with manufacturers usually publish amperage in two ways. A method is to publish the total amps by multiplying the output associated with bank times the number of banks. For example , they might publish the outcome as 40 Amps, but what they are really telling you is always that the charger produces 10 Amps output for each bank. Additional way and more useful is to publish the output per lender.

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

Battery Voltage

Most marine models are based on 12V or 24V batteries. Make sure the top-dash battery charging system you choose can handle your boat’s electric battery voltages.

Battery Types

Marine batteries serve various needs on-board your boat ranging from starting to providing electricity those primary systems. You are likely to encounter deep cycle, Gel Cel, or AGM batteries in a marine environment.

Gel Cel batteries require a special charging profile that can only be made available from models specifically designed to charge Gel cel batteries. Top-dash battery chargers that charge AGM or deep pattern batteries alone are not equipped to properly charge Foundation Cel batteries. Make sure you choose a marine model that can tackle all the battery types you have.