Now I’ve been told this can be done.
There’s no reason you can’t charge batteries in series,
As the diagram suggests, you need a 24V charger to make an adequate PD or potential difference across the two batteries in order that they accept charge.
I don’t have a 24V charger, I have a 12V charger, or 17.2V charger when on quick-charge.
This won’t be enough that the batteries actually charge, and I’m finding this when I disconnect the charger.
Starting the engine and running it is the only way to charge the batteries.
However, I’m not seeking to charge the batteries. Continue reading “Job of the day: Charging narrowboat batteries in series”