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REC and WS500 User Forum

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Alternator Amps

If the shunt is on the battery, that is good for tracking charge state as current tapers with constant voltage, and perhaps terminating charge based on profile.
Also good for keeping battery current near zero, and picking up all house loads.

It doesn't allow capping alternator current. So depending on the config, it could drive the stator very hard. Temperature control will limit this for the medium term, but the short term currents could be high. (APS 56V 160A alternator)

Is there a way to run dual shunts, one to monitor battery current, one to limit alternator current?
Or is this simply set by trial and error through maximum rotor duty cycle?

L J Jensen has reacted to this post.
L J Jensen

Paul, you raise a good point.  We have recently been doing some REC / Victron /WS500 integration testing and found that when we had the REC BMS monitoring our battery current the system seemed much more stable when we added an alternator current shunt and set the WS500 to alternator centric.

Our rationale was that in this configuration the Alternator can look after itself and optimize its operation for the alternator only.  Then the REC BMS can act as a high limit controller to the WS500 should the battery conditions need to override the alternator and put the WS500 into CVCC mode.

During our testing this seemed to work quite well and we noted significant improvements in the stability of the overall system.

We passed this back to WS and are hoping to get their thoughts on the matter, as there may be factors which we have not considered.



Paul Young has reacted to this post.
Paul Young

Will you update here when you see results?
I'm looking at similar WS500 / REC Q / Victron GX integration

I will likely start a new post for this one.  We are also continuing some pretty detailed testing over the next couple of weeks and will want to keep it all in the same thread.

If I can remember I will post a link on this thread to the new post 🙂

Paul Young has reacted to this post.
Paul Young