Battery charger convert 12vdc to 24vdc

[Rkootknir]

I currently have a CTEK 12v lead acid battery charger that I would like to use to charge / condition the 2x12v batteries used for my Mecer inverter setup. I have gotten the impression that the charger in the Mecer inverter is not optimal for batteries while I know the CTEK is pretty good.

Is there an easy / cheapish way to convert the 12v charging current to 24v so that I can leave the charger connected without having to disconnect the "bridging" cable between the two batteries? I know that the current will be split (so 7A will become 3.5A) but is there anything else that might cause issues like e.g. uneven charging?

 

[Sinbad]

I think I'd rather get 2 cteks and connect one to each battery.
However overall a bad idea as the cteks charge batteries pretty slowly compared to how your ups charges them so you would probably battle to get them charged up between load shedding slots.

Not to mention the cteks fighting against the ups charger...

 

[Rkootknir]

I think I'd rather get 2 cteks and connect one to each battery.
However overall a bad idea as the cteks charge batteries pretty slowly compared to how your ups charges them so you would probably battle to get them charged up between load shedding slots.

Not to mention the cteks fighting against the ups charger...

Will definitely disconnect the inverter's power when doing this and not too fussed about long charging times - this is more of a once a quarter "proper" charging / maintenance of the batteries (don't know if this is even necessary).

The only thing I would be saving is having to open the battery box, disconnecting the bridge lead and then swapping the charger once one battery is done which is why I'm looking for cheap & easy. I'm really just being lazy...

 

[wingnut771]

Think you're just being overly paranoid about the mecer charger. It's a 3 stage charger designed for flooded lead acid batteries. There are some charge profile pics in the mecer thread using a sonoff switch.