The panel inverter shuts down especially on Sundays and public holidays

Question

The inverter turns off the installation, the inverter has the COD 15 inscription. It happens on Sunday and holidays, apparently there is too high voltage in the network, which is up to 253v, but it is still acceptable, is it possible to do something about it, is it possible to regulate the...

Slawek K. · Accepted Answer

Since the fall, I had the same problem with exceeding 253V on one of the phases, a week ago on Saturday, I had more than 10 inverter restarts during the day, it was overwhelmed by bitterness. One phone call to the PGE emergency service was enough, that the induction hob burned out and that the voltage of the network exceeds the standard 230V +/- 10%, when asked if the neighbors are also complaining, I answered yes, less than 2 hours have passed, and the gentlemen from PGE came and examined the which power station I have power, they turned off the network for half an hour, then they called that they lowered the voltage on the transformer taps by 6V and now it is from 235 to 245 max, and everything is running beautifully. I recommend such a phone, other methods will not help.

There was clear blue sky all day, and when I saw the graph, I boiled it:

And in the following days in the same weather:

Greetings

theo33 · Answer

To help, advise, you need more info, inverter power, distance from the connection point, cable cross-section, measuring system where, cable or overhead power supply, distance to the building, cross-section of the wires

janekk77 · Answer

Theoretically, you can raise the voltage on the inverter, but there are regulations to follow them. You can report to the power industry, maybe they will improve something, but in theory up to 253V everything is OK. If they propose to set up the analyzer, and after the analysis it turns out that everything is OK on their part, you will pay for the service provided.
It is simply because of the virus that the network load has dropped significantly, so in many places the voltage is in the upper acceptable ranges, and some inverters have a problem with that.

Tech132 · Answer

Write what kind of inverter it is, in some inverters you can change to another country or bear the voltage up to 260V.

sq9fmc · Answer

The parameters of the inverter settings have been confirmed by someone with his signature on the application. He is therefore responsible for it. The inverter with settings other than declared is inconsistent with the standards and requirements set by the OSD.
The only safe option is an official letter to the OSD informing you about the problem. The maximum voltage set in the inverter must not exceed the mentioned 253V.
Proposals to change attitudes to other than those reported are harmful advice and should not take place.
It does not change the fact that many networks are in a terrible condition, as evidenced by more and more frequent topics of this type.
Determine if the problem is not on your side of the installation by measuring the IPZ at the connection point of the inverter and at the point of power connection close to the measurement system.
If there are large differences, it is worth considering changing the connections between the inverter and the network.

marekj31 · Answer

You can, for example, at this time be used to heat water with a heater or for heating, for example, a bathroom, floor tiles, towel ladders, etc., it is enough to load your internal network and the voltage will drop below the permissible 253 V

MichałS · Answer

The power of your inverter is very important and whether it is 1F or 3F. Often the voltage in the network is normal and the inverter connection is to blame, e.g. 6kW with a 2.5mm ^ 2 cable

lichtar · Answer

I see a lot of users have the same problem and so far not fully resolved effectively. There are no voltage limiters that could be connected between the inverter and the connection?

Slawek K. · Answer

Report to the distribution operator in your area and the problem will be effectively solved by reducing the voltage in the network, no other prostheses will solve it. Greetings

fazik · Answer

If I could, I would bite ...
Today, between 2:40 PM and 4:00 PM, 4 inverter shutdowns (I was at home, saw the error and reacted right away).
Previously, it was March 15, then March 22, and now April 14. After March 22, I filed a complaint with ZE tauron (intentionally lowercase) and they sent an application to be filled in for a measuring device, which I did not use.
Today I called the hotline, nice gentleman, I have a rule of thumb about the standards and the possibility of installing a measuring device for 7 days. After all, on the device of shit * it will come out, and they make me pay for unjustified measurements.
Drama, drama and drama again.

Slawek K. · Answer

Tauron is a weak company, I have them in my apartment in Krakow, a failure, no start to PGE, so they are for sale for PLN 1. Greetings

fazik · Answer

I spoke to Growatt. The dear gentleman instructed me to change the cable from the fuse box to the inverter to 5x6mm (currently 5x2.5mm and 15m long). Claims it will help.

MichałS · Answer

2.5mm ^ 2 at that power? This is a serious runtime error. Instead of unjustifiably bluffing on the OSD, replace the cable.
Assuming that the wire is copper, now there is ~ 2V voltage drop on each phase, and the transformer station is still a long way away. After all, "on the way" there are fuses and RCD as well as the cable to the ZK.

kosmos99 · Answer

But with long lines, the voltage may be too low at night. For me it ranges from 220-250V. Depending on whether the installation is working and what is the current load on the section.

zbyszekkr · Answer

I wonder what a specialist connected it to 2.5mm2 ...

kosmos99 · Answer

What is this power because I can't see it being given?

zbyszekkr · Answer

In my opinion, it would be necessary to measure the voltage that is present in the network when the inverter turns off.

kosmos99 · Answer

Most inverters have Logs with parameters available, so there is no need to measure. Or graphs, you can see the asymmetry in the following:

fazik · Answer

435.9v Panels power: 3720 kWh I have a 5x2.5mm cable in my garage - strength. This is my installation in a 10-year-old building. Now I can see that this force is a bit weak. The electrician at the construction stage asked me about the power, and I said I don't know, I don't know myself. He asked if I would use the spike - I say no, and so the 5x2.5mm cable was given. I do not want to criticize anyone, because 10 years ago neither me nor the electrician thought about photovoltaics. In turn, the gentlemen from photovoltaics connected to what they had. Damn, I can see that everyone would have to be controlled and labs in every area ... I ordered a 5x6mm YKY cable and I will stick in the box on the facade, where there is a transition from PEN to PE + N, and I will run the cable under the paving stone by the wall. I plan to connect the earthing to the hoop so as not to cut the earthing wire running to the house. Everything will be in front of the differential, which is in the fuse box at home. May be?

emigrant · Answer

At what the lowest mains voltage, for example, Fronius begins its sychronization? How does Fronius deal with unstable tension throughout the day? One time it is 240, half an hour later 230 V and in 4 hours 217 V. It does it some sort of damage, does it matter?

3301 · Answer

With a 3-phase inverter and a power of 3720W, the current will be only about 6A and the decrease at 15m is only 0.4%, so it was definitely not a problem, of course that any correction of this decrease is also advisable

kosmos99 · Answer

The distance to the transformer is of greater importance.

fazik · Answer

A small ... 200 meters.

kosmos99 · Answer

So these 15 meters won't matter much. It is best to include a load with such a large production.

AT PRO · Answer

And that was where you had to start. You live close to a transformer, most likely there are few consumers on the line you are connected to and there is a problem with the high voltage. You have to try to pick up the production at such moments, because the EC does not want it either if there is no one to use it.

kosmos99 · Answer

It is not exactly like that, the transformer works both ways, the problem is related to the impedance of the wires. The higher the inverter, the inverter must raise higher, unfortunately 253V is the maximum due to the safety of the receivers.

AT PRO · Answer

Are you sure? I don't think so. But let someone who knows it from practice speak.

Slawek K. · Answer

This is exactly how @ cosmos99 writes. Greetings

Wojte1199 · Answer

[movie: a2ff5a19a6] [/ movie: a2ff5a19a6] Sorry for the little offtop. Enea I fought with them for a month. When the team arrived it was ok. The measuring car found nothing. They looked at me like an idiot. Finally, on the plans, they found a joint in the ground several meters away from me. After digging up and cutting the joint, the culprit was found. The neighbors were glaring at me that my PV installation was to blame that I was welding something, KF radios were breaking the electricity (literal words from my neighbor). Three houses powered from this wires had a disco. The boilers did not want to turn on, the inverter did not start at all. They put the cord in full and calm.

The panel inverter shuts down especially on Sundays and public holidays

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Post #12

Post #13

Post #14

Post #15

Post #16

Post #17

Post #18

Post #19

Post #20

Post #21

Post #22

Post #23

Post #24

Post #25

Post #26

Post #27

Post #28

Post #29

Post #30

Topic summary