Charger for 2 x AGM 100Ah boat batteries?

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marcuslundh asked May 31, '21

Charger for 2 x AGM 100Ah boat batteries?

I have a camping boat with 2 x 100Ah AGM batteries and a switch panel for 1, 2 or 1&2. Starter battery (1) and battery (2) for the fridge, Ipads etc. I want to be able to charge fairly quick when there is access to shore power, use solar when in nature and to keep batteries full when at harbour (no power there).

What charger is best for my setup? Thinking of these...

Blue Smart IP67 12V 17A

Blue Smart Ip22 30a/3

Blue Smart Ip65 25a

For solar this is my thinking. Connect this to both battery 1&2?

Solar panel 100W with regulator Smartsolar Mppt 75/15

In the future I’m considering changing battery (2) for a lithium if needed.

Im new here so any recommendations is greatly appreciated.

battery charging MPPT SmartSolar charger Solar Panel

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Answer 1 · 2021-06-02T16:36:31Z

shreeyash answered · Jun 02, 2021 at 04:36 PM

Hello Marcus,

Considering the setup would on a boat, IP22 seems to be out of question as it does not provide any protection from water splashing. Considerable options would be chargers with IP65 or IP67 code. If charger is going to be immersed in water (max 1 meter depth) go for IP67.

Blue smart chargers are capable of charging AGM as well lithium batteries. So, same charger can be used in future for a setup of lithium batteries.

Charger output amps can chosen based on battery capacity, charging time, etc.

@marcuslundh: Hope this helps you.

Best,

Shreeyash

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