SmartShunt SOC Automatic Synchronization not triggering

Hi All, I'm having trouble understanding why my SmartShunt 500a won't automatically sync SOC to 100% even when all parameters appear to be met. I'm seeing this across a few installations and it isn't just a one-time occurrence.

Tail current should be 24A - and the maximum recorded in VRM is ~6A.

Charged voltage is 13.2V and the lowest recorded is ~13.35V.

Detection time is 6m however the chart below shows a period of 6 hours where synchronization did not occur and my SOC was sitting at ~90%.

Batteries are LiFePO4.

All I can think of is that there are transients from my load or charger which are not being captured by VRM but are causing the shunt to re-start the synchronization period.

Any other ideas?

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

klim8skeptic ♦ commented · Oct 03, 2023 at 11:05 PM

@John Richardson I would not expect a 4 cell, 12v LiFePO4 battery to be charged until it reaches 14v (3.5v/cell).

What is your battery? What are the manufactures recommended charge voltages? What voltages have you set your chargers to?

0 ·

Show more comments

kevgermany ♦♦ commented · Oct 04, 2023 at 04:25 AM

There's a setting in VRM which controls how often data is sent to the server. If you reduce this to 1 minute you'll get more detail. Might not capture all transients, but you have a better chance.

These will be more visible if you look at graphs with a shorter time period, say for one or three hours, reduces the effects of averaging.

0 ·