Today i noticed the grid limit specified in my 3 phase Multi RS solar setup is ignored when feeding back to grid, i have a 3x 25 amp grid connection, and thuss configured the limit on all 3 units at 25A, however today we had still good solar once the feedin started, and it seems all possible battery power + the direct attached solar + the solar from my AC-in connected inverter was sent into the grid, spiking at 29A per phase / multi rs unit.
I would asume the units would throttle and adhere to the configured grid limit, but this seems not to be the case.
Running firmware 3.70, upgraded to 3.80~2 did not fix it. MultiRS running 1.28, power meter used VM-3P75CT running 1.11 (as grid meter). Everything including the Solaredge inverter is connected at AC-OUT.
I have the same problem with 1 multi RS on 3 fase grid connection. The grid voltage is also in the screenshot 240.1v at that time. I’m still using that node-red script to limit the multi RS amps and keep it below 25A
I don’t know if the problem is fixt in new beta versions can’t test right now because there isn’t so much solar power at this time of the year.
But if victron is really working on this problem (system ignoring grid limit) I’m willing to help and test by lowering the grind limit and see if the system lowers output to the matching grid set point.
Yes it does look like a bit like this issue, but it is not quite the same. I had a look back to see if this ever happened before, and i noticed the same behaviour on the 25th of feb. (last month). It anyway leads me to think the issue is with the RS itself, not with venus os or the power meter..
Im now thinking about enabling the continue with missing phase feature, as im afraid this will eventually blow one the grid fuses and turns of the 3 units all at once, while im ok with lossing a phase as i have no critical 3 phase loads connected. However, looking at the start of the better solar wheater i am kind of worried, so hopefully someone at victron has an answer to this.
Grid voltage was around 234v, so nothing special and well within spec.
I’m not sure if i agree with setting the grid limit to a lower value, the grid connection here is terminated on 3x 25A D car. breakers, should be able to whitstand 24/7 25A without any issue?
To add to this, i remember in older firmware versions of the MultiRS we could never get higher that the 5000w per phase feed-in, as it was a limition in the firmware, not sure it was the meter or the RS firmware, but this problem seems to be the other way around now.
Same here. I noticed 21 kW export this morning (PV+ESS). Running Multi-RS firmware 1.28
I am having C25 grid breakers which can handle 27-28A for quite a long time. And even higher currents for an amount of time, I have learned this morning.
Will the grid feed in limiting be operational by updating to v1.29?
I’m running 1.29 as of yesterday, but today i had no problem as there was no excess solar during the sell cycle at the afternoon. I also did not read anything in release notes so time will tell i guess..
I run a 3-phase system with 3x MultiRS (v1.29) and a VM-3P75CT (v1.11) grid meter on VE.Can, Venus OS 3.71.
This morning DESS was feeding back from my battery while the sun was rising, and it seemed that the configured grid limit of 28A was not fully respected.
(I noticed > 32A on all 3 phases)
When I turned DESS off, and started manually setting the ESS setpoint through NodeRed, the multiRS actively throttled down my requested setpoint to stay within Grid bounds, even if I asked for way too high setpoints.
It almost seems as if user-set setpoints are more carefully checked against bounds than DESS originating setpoints.
I will look into the behaviour further as I do not want to blow my grid fuses and try to support my view with some graphs if I can…
This situation mostly arises when energy prices are high enough to warrant fully discharging my battery while solar energy is (already or still) high which is obviously not happening too often.
After some consideration my current view is that with DESS turned off, and my manual controlled (too high) setpoint, the MultiRS enforces the grid-feed-in limit of 6000W from (grid) settings in its configuration. With DESS enabled it clearly ignores this limit somehow.
and try to support my view with some graphs if I can…