question

cargol66 avatar image
cargol66 asked

How to keep 4S 2P 12V 220Ah Gel Victron batterybank balanced?

Hello Everybody,

As mentionned in §6.3 of this article

https://www.victronenergy.com/media/pg/Manual_SmartSolar_MPPT_100-30__100-50/en/operation.html#UUID-8215391b-0004-2e53-2eb5-521a9c260cf1

Gel batteries are not suitable for equalization charge.

How to keep balanced a 4S2P with 8 Victron Gel 12V 220Ah batteries without performing equalization regularly ?

How should be wired the battery bank? parallel wiring then serie

victron-2p4s-wiring.png

or

victron-2p4s-wiring-bis.png

or Serie then parallel

victron-4s2p-wiring.png

In this second solution, wether batterie balancer should be used, each battery string will need battery balancer

What is your feedback about keeping balanced a serie string ?

Thanks for your replies.

battery chargingBattery Balancer
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2 Answers
nickdb avatar image
nickdb answered ·

You really should use battery balancers. You can get by with 3 balancers, it should be documented in the balancer’s install manual.

We have a few installs just like this, works well.

Like this, without the last bank.

912938ef-0d25-491a-8b30-f3b352de6dd9.jpeg


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cargol66 avatar image
cargol66 answered ·

Hi,

thanks for the wiring schematic. It confirms that batteries should be parallelized before to be serialized.

What about the equalization process for Gel Batteries ? Please could you confirm Gel Batteries should not be equalized and the only way to keep bank balanced is batterie balancer?

Thank for your help.

Regards.

1 comment
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kevgermany avatar image kevgermany ♦♦ commented ·
Equalisation is only for specific battery types. Not for Gel. Internal equalisation is automatic from the absorption/float stages of charging.
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