Hi recently just finished shoe horning-in a Multiplus 2 10,000kVA where my Original Multiplus 2 5000kVA was.
Everything has been house wise is wired on the critical load side of the Multiplus 2 10,000kVA with 25mm tails with two 100amp isolation switches on the input and output of the inverter, there is a transfer switch in the CU for maintenance.
So I’m using the Multiplus 2 as a gateway like all the new kids on the block are calling it. I find this way the stability to deal with the AC solar is a lot better as it reacts faster to drops or increases in power. Wired to a GX device all hard wired via Ethernet and temperature sensors wired to the Garage for ambient temperature battery positive bus bar temp as this is the only one that go’s the highest in temperature range, the Multiplus 2 Exhaust temperature and my Computer as I like to see how that’s doing.
All the AC solar is connected to the critical output and both arrays have a ET112 monitoring them. 3kW array on the house and a 1.5kW array on the garage.
The inverter is connected via 2x 1meter 70mm tinned coppers battery cable to a Lynx distributor fused with the best Mega fuse I could source in the voltage range of the system which was 2x 70volt 225amp fuse’s which all connects to another distributor that fuses the four battery connections with 4x 70volt 125amp fuse’s connected to 4x pylontech US5000 in a server rack cabinet with Shelly device monitoring the humidity and temperature so that it enables the ceramic heater in the winter so it can keep the batteries in there optimum range.
EV charger is an Indra smart lux wired direct to the grid monitored by a Shelly device and the VM-3P75CT waiting for Victron to release the update so we can see this in the VRM @guystewart any nugges in the right direction would be appreciated I monitor the whole system from Grid, Solar, EV charger, House load, Battery Heater, Humidity and Temperature of the batteries using home assistant.
Thanks Via Home Assistant HACS integration (Victron GX Modbus TCP) Intergration To expose the Victron Elements and the (Powerflow Card Plus) Lovelace to put them together with some of the Shelly data
For the Grid Im Using the shelly EM i have at that point combined entity on the power card and display two-way ie neg and pos using one sensor, For the solar I’m using the ET112 that is exposed by the Mod which comes under pvinverter L1 power If you have more than one array with another ET112 its the same victron just lists the ET112 as pvinverter L1 power so you just have to look for the other one to list as the other array.
For all the Battery Heater that’s all done using the individual card data points that you can add via the card the extra solar that i have was added that way as the card only starts with one.
The battery heater, Humidity,temperature and EV charger is all from shelly data points which home assistance exposes very well.
The Batteries are pylontech exposed through the victron mod under System battery power, State of charge is called battery soc and i used a display two way state to get charge and discharge and i used invert state toggle in the card to get it to correctly display charge/discharge.
For the House that is exposed via the victron mob under system consumption L1 and the secondary point on the card is frequency under vebus out L1 frequency
Yes its been a lot of playing around to get this complete probably not explained it well but if you just play with it, it gets easier to understand.
On another note @guystewart can you feed it back for grid set points to be locked in after shut down or firmware update as my -50 grid set point changed to -10 anyhow its updated or shut down.
we had a power cut for the first time in ages Sunday I think they said it was a frequency thing but 2000 odd homes went dark the first ting I know about it was all the alarms from the system saying the grid was down
I would have never known otherwise lol, no I couldn’t go parallel my space was too small and the height I just about got that 10kVA in lol if I had the room
yeah I could have gone for two but it’s all KISS Keep It Stupid Simple,
for earthing I just went straight earth rod firing 4.5 meters worth of it into the ground so very low earth reading for a TT system with a 25mm earth cable I’m not coupled to the DNO’s earth at all and I have not metal pipes ie water and gas so I’m a true TT system DNO has noted it when they changed the fuse.
Yeah the 10kVA is working a dream able to run the house normally with everything going through it apart for EV charger.
Hi mate no that’s cool, no I didn’t do anything to manage the charger, I’ve connected it before the multiplus so it doesn’t even know and EV charger is connected so doesn’t drain the battery I bought an EV charger that has solar control local built in at the moment I have turned it off.
But when the battery energy suppler starts to hold me to charging times in the day then I’ll switch it on. Would say get the charger for you, integration is good but you lose some features on some parts I would say look at home assistant as that can integrate almost anything.
I monitor the whole system from Grid, Solar, EV charger, House load, Battery Heater, Humidity and Temperature of the batteries using home assistant.
