Inverter charging current

[Seeyou]

Hi guys

I have an inverter connected to two Enertec 23BAT674S-VAL 105Ah batteries. (specs here: https://www.enertec.co.za/specs/commercial_truck_mining/energizer/674S.pdf)

The inverter has two charging modes - 10A and 20A. It came set to 10A and I've never switched it, but with load shedding happening so often the long charging times are occasionally becoming an issue.

Switching to 20A would halve the charging time, but my question is - are there any downsides to doing so? A formula I found online suggests anything up to 20% of the Ah rating is safe, which would imply charging at 20A would be fine - but I wanted to double check first so I don't damage / shorten the life of the batteries.

Thanks in advance.

 

[sajunky]

Before even checking specs, I would say, yes. Even more, something between 10% and 20% is always recommended because it helps breaking sulfation. Slow charge do not break sulfation. If slow charging regularly, the battery will not last long. A fast charge (faster than 20%) can cause gassing which has some positive effect, but it should not be done frequently.