Voltacon / Pytes E-BOX-48100R low temp issue

[GonzoTheGreat]

Myself and a few friends recently brought some of the Pytes E-BOX-48100R rack batteries. These were badged up as Voltacon in the UK.

We have noticed that when the packs drop down to about 12deg C, the packs switch down to 2.5A charging.
This is very noticeable on the graphing. Plenty of charge available and the reduction is a definite step change and it drops to a level 2.5A.
One of the guys has added a heater pad to his to keep the packs at about 16deg C and they charge as expected.

The assumption is this is a BMS parameter issue.
Anyone seen this? Any known issues ??

(I've not tried going in via console to see if there are any settings available, so the packs are all at factory settings.)

 

[GonzoTheGreat]

Slight update, in case it helps anyone.
It turns out the issue was that the charge controlers (hybrid) that the other guys were using, was the source of the throttling back. The hybrids were were being commanded by the battery BMS to reducing the charge current, based on cell temp. There is apparently a charge/temp curve, which I will post here when I get a copy.
My system is totally analogue, so I did't see it.

But we have all added pack heating to keep the cells at a happy temp.