I have a three fase system with 3 multiplus Ii 5000/70 omvormer laders verbonden aan gerbo gx 30Kw batterie pack and to a 10 Kwp solarsystem . All of the house is connected to ac1 out and the contact on the gerbo is used to stop the heatpump when there is a powercut. So far so good all works fine specially in summer. Now in wintertime I have problems to make the whole system a bit usefull. My problem to regulate it is as follow. I have ESS my minimum charge on 75%, because i do want room for power cuts. If I put my grid power low, like in summer 50 W when I use less power, the charge of the batteries will be 75% all the time, unless we have a nice sunny day. If I put it high, now 5000W, it will not take much from the batteries when the heat pump runs, but during the night it will charge the batteries to 100% and then in the early morning when the heat pump ask more energy, it will go down back to 75%. I have a energie meter ET340 on the heat pump, designated as heat pump and I assumed this would regulate the higher loads, from the posts here I understand that this is only a display of the name heat pump. How can I keep the system from charging and discharging the batteries with grid power, as this is useless. I preferable do not want to separate the heat pump by connecting it before the system, as with a power cut it will not keep its memory for more then an hour. Now I disconnect he heating, but keep the memory.
I’ll reply in Dutch, then..
Here I have a heat pump that can easily use 20 kWh on a cold day, as well as a 32 kWh battery and 7 kWp of solar panels. The batteries are charged exclusively with solar energy.
Only on a very sunny day in the winter months is it possible to run the heat pump on the Victron/home battery. Over the past two months, this has only been possible on two days. Without DESS or Node-Red programming, I can’t set my expectations any higher here.
It may be that the Victron DCVV function offers possibilities for you (and me).
I understand that you have the same problem. But I’m not familiar with dcvv. I did see dvcc, but I can’t really find anything there that helps me. I’m trying to steer clear of Node-RED because once everything is working, I don’t really want to make any more changes. But when updates are necessary, I expect I’ll have to get to grips with Node-RED again. I’m curious about your system and your experiences, and where you bought it.
I have a Multi RS 6000 single-phase, with 2x9 panels connected to it; also a Cerbo and a SmartShunt to accurately determine the SOC of both batteries. It’s been running ESS for 3 months now, with no Node-RED, DVCC or anything else.
I still need to look into DVCC in more detail… but I’m thinking KISS: keep it simple.
Yixiang DIY battery cabinets with Nkon MB31 cells. Unfortunately, 2 cells in one battery have a significant discrepancy; even after balancing, the difference keeps coming back.
Victron is complex, confusing and the software isn’t smart, but the hardware components are excellent.
Hi, have you configured your system as an ESS?
I have a similar system: 3-phase MP2 5k and my whole house on AC out, 20 kW Pylontech batteries, DVCC enabled (required by the Pylontech BMS), 10 kW PV (DC).
In my opinion, DVCC won’t solve your problem either.
My system runs with the same settings all year round. I never change the settings; it’s been running like this for several years. The system is set to BatteryLife with a -50 W grid setpoint. Minimum SOC is 40%; consumption from the grid is always minimal, and between March and November it’s 0.
I have an EM540 meter on the grid, and in a few weeks I’ll also have a heat pump. I’ve also installed an ET340 and an ET112 for this; the heat pump will also be connected to AC out, so I’m curious to see how that will work.
I also run Home Assistant, so I can fall back on that if the Victron system itself doesn’t control the heat pump.
I do know that Victron is working on integrating heat pump monitoring into the VRM overview.
Yes, both ESS and DVCC settings: one for charging, the other for controlling the PV, batteries and grid. Without the heat pump, I have enough power, but the heat pump draws about 7,800 watts, and when the electric auxiliary heating is switched on (I’ve turned it off for now), 14 kW. The result is that either the battery quickly drops to its minimum, or the batteries are constantly charged from the grid and then discharged again by the heat pump.
That’s a hefty heat pump; don’t you mean that the output is 7800 watts?
My heat pump has a 3000-watt heating element, and the compressor has a peak draw of 2500 watts. Combined, however, the peak power is about 4200 watts while the heat exchanger is defrosting, which takes a minute or so.
I want to run the heat pump either from the grid or from the home battery via a Hager changeover switch. In the winter months, that almost never works because my battery is charged exclusively by solar panels. On a cold winter’s day, my heat pump draws up to 20 kWh of electricity, and then the battery does indeed run out very quickly.
I’m still waiting for the changeover switches to be delivered, so operation is manual. I can ONLY switch over when the heat pump is on standby, and then I CANNOT switch over in one go; there has to be some time between the supply from the grid and the supply from the Multi RS 6000. The changeover switch also has a centre position.
No, it’s electrical power; you can see that clearly in VRM. What I’m actually looking for is a setting that makes everything the heat pump does come from the grid. The rest can then keep running as usual, even when there’s less sun.
Because the heat pump has its own meter and it’s configured as a heat pump, I thought I could solve it this way. Unfortunately! Maybe I’ll just have to go with red note after all.
I have connected a VM3p75CT meter via VE.Can that measures my heat pump, but I can’t find a tile for it on my dashboard. It is visible under Advanced, though. A tile on the main dashboard would give a better overview. I hope it can also be included in energy trading, so it runs at the cheapest rate per kWh—charging when electricity is cheap and then using it when needed. (The system is 3× MultiPlus 8000 and a 57 kWh DIY battery set.)
If we’re the only ones, probably nothing will happen. I don’t actually know whether you can submit some kind of change request to Victron…
As far as I know, and from what I’ve read before, this feature is on its way.
Since the latest GX update, EEBUS is also available. If your heat pump supports it, you can use this to read its consumption without an energy meter.
I’ve activated this too, and it works well. Unfortunately, there’s still no tile for it in VRM either.
In later updates, it should also become possible to control your heat pump intelligently using this, for example with opportunity loads.