I have a boat with a battery pack of two 100Ah lead -acid batteries, connected by the negative terminals, and each of the positive terminals is connected to the ON/OFF battery selector.
Originally, the boat came with an IP65-protection battery charger installed in the engine compartment, next to the battery pack. The charger has three 6A outputs, so due to it doesn’t charge them properly.
I want to install a V ICTRON Blue Smart IP67 Charger 12/25, but it doesn’t exist with three outputs. So, I’d like to ask if it’s possible to install two of these chargers that can charge both batteries in the battery pack.
The wiring diagram would be approximately as follows:
25 amps is pretty high for charging a 100Ah lead-acid battery. You generally want to charge at about 0.1C, which is around 10 amps, to avoid overheating or boiling the battery.
Take a look at the NOCO Genius GENPRO10X2. It has two 10 amp outputs and is IP68 rated, so it’s well protected against water and dust.
If your batteries are connected in parallel and you don’t have a multi-switch, you could just use one charger for the whole bank.
With Victron chargers, you can set the charging current to whatever suits your battery.
No matter how you set it up, what you have will work, but sticking to recommended charge rates is best for battery health and safety.
Sorry Owen, only one question more,
About, If your batteries are connected in parallel and you don’t have a multi-switch, you could just use one charger for the whole bank.
Please, could you send me a conection diagram in order to clarify my poor electric knowledge?
I could use only one Victron as I said with one outlet connection for to charge my battery blocks?. How can I do connect it?
This is something I could find quickly. These batteries are essentially isolated and not parallel unless the switch position is both. If they are like this, you will need 2 charging sources. In this diagram, they have a VSR that will connect the batteries when one reaches a certain voltage that is high enough.
