Micro-omvormer en kleine zonnepanelen installatie

[TomNoordwijk]

Hi guys!

My Dutch is quite poor, I hope that you can forgive me if I ask my question in English.

Before I fix my roof to hold bigger solar panel installation, I have decided to place few solar panels in other places (front and back tool shed with flat roof). Those solar panels will be connected to groups with other devices connected.

- I do understood that I need to stay below 600W production per each group.
- my plan is to get APS DS3-l microinverter plus two panels 330W (solar panels will be placed on flat surface - not optimal angle). On top of that I would buy APS cable with L/N/GND to connect to the grid.
- do I need to put some kind of fuse etc. between microinverter and connection to the grid?
- do I need to inform my electricity provider?
- do I need to get electrician to confirm everything is OK, to avoid any discussion with insurance company in case of fire etc.?

Thanks in advance for help!
Tom

[jeroen3]

- I do understood that I need to stay below 600W production per each group.

The only applicable limit is 80% of your main fuse, and of course the cabling. Is the 600W a limit from APS?

- do I need to put some kind of fuse etc. between microinverter and connection to the grid?

Yes, you need to protect the wiring and differential protection. Typically an RCBO is used.

- do I need to inform my electricity provider?

Yes, this is mandatory after installation. https://www.energieleveren.nl/

- do I need to get electrician to confirm everything is OK, to avoid any discussion with insurance company in case of fire etc.?

DIY electrical installation is not prohibited, but for insurance, you might need certified* installers. (that doesn't mean they're any good, that just mean they're liable)

[TomNoordwijk]

Well, I was reading that only 600W can be produced on a group with other devices. APS could do more.

Do i really need differential between micro inverter and rest of grid? Clearly, my fuse box has few differentials.

[jeroen3]

You cannot put a pv system on shared group. It must have it’s own dedicated protection.
A direct line back to the main distribution with a separate rcbo, since you also can’t share the rcd.

There are options to share a feed to, for example, your washer. With a PV verdeler. But you can’t have any branches, it must go directly from main distribution to pv-verdeler, from there to pv and washer.

[ Voor 4% gewijzigd door jeroen3 op 07-11-2022 17:22 ]

[TomNoordwijk]

jeroen3 schreef op maandag 7 november 2022 @ 17:22:
You cannot put a pv system on shared group. It must have it’s own dedicated protection.
A direct line back to the main distribution with a separate rcbo, since you also can’t share the rcd.

There are options to share a feed to, for example, your washer. With a PV verdeler. But you can’t have any branches, it must go directly from main distribution to pv-verdeler, from there to pv and washer.

Hmmm, this is not what I have understood... I thought that below 600W it is ok. Then the problem might be solved by itself

[Fairy]

TomNoordwijk schreef op maandag 7 november 2022 @ 18:10:
[...]


Hmmm, this is not what I have understood... I thought that below 600W it is ok. Then the problem might be solved by itself

500 watt or less. Not 600. For example a Soladin 600 is capped at 500 watt...

[ Voor 8% gewijzigd door Fairy op 07-11-2022 18:23 ]

[Proton_]

De grens was 2.25A invoeding; bij nominale spanning komt dat iets boven 500W.

Maar intussen is voor een omvormer een eigen groep of onderverdeler nodig.

offtopic:
Ik ga ervan uit dat Google Translate voldoet.
GoT huisregels:
3. Engelse posts worden gedoogd, maar het is niet de bedoeling dat dit de boventoon gaat voeren. Voorbeeld: een vraag in het Engels stellen mag, mits Nederlandse antwoorden dan ook geaccepteerd zijn.

[TomNoordwijk]

Thanks guys for answers. It seems like the easiest way is to have separate group ( which I wanted to avoid for a moment, as it will be hard to put new set of cables to my tool shed).

500W seems a bit too low, but I might consider... Let's see.

Again , thanks!

[Proton_]

Als er al een ononderbroken kabel ligt, dan is een "PV verdeler" een praktische oplossing.

[Septillion]

Yep, PV verdeler is eigenlijk de enige correcte oplossing, De "max 500W" is ook komen te vervallen. En inderdaad even aanmelden op https://www.energieleveren.nl/

[TomNoordwijk]

Proton_ schreef op maandag 7 november 2022 @ 20:44:
Als er al een ononderbroken kabel ligt, dan is een "PV verdeler" een praktische oplossing.

Than I am a bit lost... I though that limit of 500W comes from the fact that in case of malfunction of one of the devices, in will not draw too much current (16A from fuse plus 2.25A max from solar panel). How the situation will chance with PV verdeler?

Cheers!

[Proton_]

Met een PV verdeler heeft alles een eigen 16A beveiliging: de kabel in de meterkast, de verbruikers in de ene helft van de PV verdeler en de opwekkers in de andere helft. Er kan dus geen overbelasting plaatsvinden zonder dat er een zekering triggert.

[TomNoordwijk]

Proton_ schreef op maandag 7 november 2022 @ 21:31:
Met een PV verdeler heeft alles een eigen 16A beveiliging: de kabel in de meterkast, de verbruikers in de ene helft van de PV verdeler en de opwekkers in de andere helft. Er kan dus geen overbelasting plaatsvinden zonder dat er een zekering triggert.

But to be clear, connection between meter kast and PV verdeler can not have any devices connected, right? This is not the case with my set-up.

[Wilke]

TomNoordwijk schreef op maandag 7 november 2022 @ 21:43:
But to be clear, connection between meter kast and PV verdeler can not have any devices connected, right? This is not the case with my set-up.

Correct!

[TomNoordwijk]

Wilke schreef op maandag 7 november 2022 @ 21:45:
[...]


Correct!

Ok then, clear :)!

Seems like separate group is the only feasible was forward.

Thanks!