I have a MPII 48/5000 that feeds my property from 4 Pylontech US5000. Most of my consumer unit is hooked up to Essential loads which works perfectly for us.
To charge my EV I have a MyEnergi Zappi (7kW). This is clearly not on the essential load circuit.
To avoid the car charging draining the house battery I always schedule a charge of the house batteries during car charging.
I have an odd behaviour in the last 6 months where despite the house scheduled charge starting 15mins ahead of the car charge, after a minute or so of the car charging the MPII trips from ‘On’ mode to ‘Off’ unexpectedly. No circuits are tripped?
What would cause this?
To note if I don’t have my changeover switch set to primary feed from the grid (rather than the MOII) then the house goes down as most of it is on essential loads.
Looking for some guidance as to what could cause this and also what charts people may like to see from VRM Advanced to help analysis / diagnosis of the issue.
@7hvn Hi show us a Topology of your system, the systems doesn’t sound like it has the charger design in mind, ie you don’t need to force charge the system if the multiplus is after the charger, so I would say either the multi is setup to cover input and critical loads or the CT for the multi is at the main service head before or with the Zappy CT.
Make sure the Zap has load curtailment in order to save the service head fuse as the DNO would not be happy are you able to show us some pictures of this area?
The ET112 is your issue as far as im aware no Victron devices can monitor a circuit without the multiplus wanting to factor it in, Only caveat is the VM-3P75CT can show EV on the VRM but I think this is a limitation rather than a feature but my system is automated so as soon as the car starts charging the system will automatically charge until the EV stops octopus turn it off or I stop it.
I would need till disable my automation to see if this is fixed in which case I’ll just remove it as I monitor everything display wise through Home Assistant so I can see everything that’s happening at the same time The Victron stuff is for fault finding for me so doesn’t matter that I can’t see that in Victron.
Your naming of the CU’s needs changing the Zappi one should be 1 and the Multiplus one be called 2 it is here in the Multi CU that should live also depends what other loads you have in Zappi CU must have load curtailment to even think about that as full power on both your on the door step of that 80amp fuse.
@7hvn Thanks it’s taken a while, Yes it’s as I thought your multi is also covering everything in in the Zappi CU, do you know if it’s ACout1 or ACout2 that the multi has been wired? Changing that setting to the way I have it will not monitor anything in the Zappi CU so that ET 112 at the location should be fine just a change of setting But be aware all loads in that CU will not be covered by the multi
So keep to the naming you have there otherwise it’s going to be hard work for me to keep track just label the CU’s after it’s all sorted, so CU3 is just the ET112 Zappi and the multis input MCB/RCBO if so change that setting and test it should not deplete your batteries now
Hey @Daza Switched the setting over yesterday with no ill effect. Charged the car today on 3 hours free from octopus energy and so far so good. No tripping oif the MPII. Fingers crossed it continues Thanks Again!
Thanks Again!
but once I get my second charger things will change lol