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Jmarc@aeandmengineering.com avatar image

Parrallel Quattro spurious Overload alarm v465

We have a new set-up (<3 weeks) with two Quattro 8000/200/100/100 24v 230 set-up to run in parallel linked to CCGX and Lynx BMS Control for MG Energy LFP batteries. Both units have been upgraded with v465. CCGX is upgraded to latest release.

Since day one we have spurious L1 Overload on Master Unit and usually concurrent to the event a load buzzing and the Slave unit is appears to be OFF with no fault when fault appear. No overload warning. All the incidents happened in light or no load conditions.

We have witnessed one incident with no load connected to the output of the quattros. The two outputs were cross connected at the time of the incident. We measured current spike between the two unit when this happened. It would seem that either the units are getting out of sync or one of the two unit is short circuiting causing the other unit to overload.

We have replaced the cross connecting Ethernet cable with brand new patch cable with no appreciable improvement.

Any Ideas, suggestions ?

MultiPlus Quattro Inverter Chargerparallel
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Can you provide a line diagram of the current connections?

2 Answers
Jwfrary avatar image
Jwfrary answered ·

Apart from ensuring the wiring is as spec requires and wiring unlimited is great for understanding why, can you confirm that the Quattro have been programmed to be in parallel and all have the same settings in ve.configure

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PetaJoule avatar image
PetaJoule answered ·

Please make sure you read the fairly good "Wiring Unlimited" book from Victron

https://www.victronenergy.com/upload/documents/Wiring-Unlimited-EN.pdf

especially the part about AC cabling, page 54

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