Modifying an Adverc Battery Management System

[Biscayan]

I replaced a pair of old lead/acid batteries (2x120 Ah), which were controlled by an Adverc Battery Management System (https://adverc.co.uk/collections/adverc-battery-systems/products/adverc-battery-systems); and I have purchased AGM type (2x140 Ah).

I know that charging voltage must be slightly higher now, and tried to contact Adverc technical staff, but they do not reply (went out of business?). Can anyone provide advice on how to increase the charging voltage?

Thanks.

 

[Poecheng]

Adverc have been taken over and the new peeps are not interested in the BMS side of that business as modern alternators have, for nearly all markets, made it somewhat redundant and sales had tanked.
Working from memory here: Inside the box you will find a circular thing which can be rotated with a screwdriver and that is what controls the top voltage. ISTR that there is low 'gearing' (ie it can be very accurate) and that you have to turn it quite a bit to get the voltage increase. You would have to have a good voltmeter and know which phase of charging you were on and then crank it up a bit. I would do it in many stages over many 'runs' and monitor what the upper voltage is so that you do not exceed the battery manufacturer's settings.

Hope this helps but let us know how you get on as I need to get an Adverc and a set of Victron AGMs in that have been lying round the house.

 

[Biscayan]

Thank you very much for the explanation. I will try it next time onboard.

Meanwhile, I have just found this picture on the forum. Can you remember if the mentioned circular thing is on the top right?

 

[mjcoon]

The circular item with a "v" written on it at top right is a standard housing of a power transistor mounted on a heat sink. Underneath I guess it has three connections through holes in the heat sink. It will not rotate.

 

[st599]

Presumably the circular thing meant is the potentiometer in the photo, not the power BJT on the heatsink.

 

[mjcoon]

Presumably the circular thing meant is the potentiometer in the photo, not the power BJT on the heatsink.

Oh, yes, blue and rectangular on bottom right; I should have looked for something to be rotated with a flat-blade screwdriver!