I’m planing a Off-Grid solution with 24 SolarPanels and 10kwh Batterie.
Is there anyone firm with German Law ? It is important to NOT register the System !
But would be nice to have the Grid as “backup”
I think the best option is to talk to your local distributor. You are unlikely to get good localized advice here on the forum.
Yes, i See….
i figured out, there is no legal way/system for my wish.
In case i would do an Off-Grid Setting….. would this work as shown on the attached picture ?
Do the HMT-2250 also load the Battery through ACOut1 ?
The Victron MPPT (each with 1-2 Modules) keeps the Battery up to support the HMT with AC to sync.
Hi @Slacki
you System with three Independent MP2 does make sense.
The 3p HMT need a synchronize 3p cluster of MP2.
Create a 3p cluster of MP2s.
Connect all batteries parallel and as one stack.
Connect the MP2 cluster via common DC bus bar with the batterie stack.
Connect MPPTs to the same DC bus bar.
I recommend using two couple Lynx Distributors.
If you haven’t bought the batteries, consider NKON ESS Pro or other 16 kWh. In any case go for 16s.
Check out my system with HMS.
If you are allowed to create an off-grid system depends on your VNB. Some insist you connect to the grid if there is a grid available.
If you can easily connect the grid, than it is decently not off-grid.
There are many very long exhausting discussions about this topic in the old forum.
If you are allowed to build an offgrid system on a grid connected yard, you could attach a generator or check out MeineEnergiewende on YouTube. Maybe he consult with his Company Rayotech
@BjoernK
Hallo Björn,
sieht so aus, als hast du genau die Anlage gebaut, die ich auch bauen will.
Nur habe ich dazu noch einiges an Fragen bzw bin mir bei einigen Punkten nicht sicher.
Können wir uns mal privat unterhalten ? Leider ist mein englisch auch nicht besonders gut 
I built an off-grid system in BW back during the lockdown. What I had to do according to the electrician was just make everything pluggable. That way he said it only was an “appliance” and not a fix installation. He said for insurance reasons as well, he said this way it’s also not subject to scrutiny if there’s any electrical problems.
only “plugable” will not work with 3P HMT-2250 and 3 MP2 ?!
i will do the most i can by myself and final installation from an electrican (for insurance reason)
Alright
A purely off-grid system does not make sense in an area supplied by the grid.
In summer, far too much electricity is lost, and in winter, far too little electricity is available.
In an area supplied by the grid, only an ESS system (with/without emergency power function) makes economic and ecological sense in order to drive forward the energy transition.
The picture shows the 24kW PV system these days.
A disappointing 1.1 kW daily yield, the diesel generator had to run.
In summer, the system cannot use around 60 kW per day because it is a purely off-grid system.
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i struggle with the registration of the system and a new PDB.
off-grid is the only makes sense for me. in according to price and realisation.
There are thousands of often very heated discussions here about how to get around the regulations and what you can cobble together.
From my personal experience of operating a large, purely off-grid system, I can only give you one piece of advice: it makes no sense, either economically or ecologically, if you have a grid connection.
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I honestly don’t understand why anyone would want to avoid registering a PV system, but the simplest solution is to build a true off-grid system and charge the battery in an emergency using a charger connected to the public power grid.
Registering a DIY PV system in Germany is straightforward. Certified installers who can inspect and register a DIY system are easy to find online. The cost is usually between €500 and €1,000 and pays for itself very quickly.
That is simply wrong. There is no legal obligation in Germany to connect to the public electricity grid. Such a connection is only conceivable through civil law contracts, for example, if the grid operator owns the land and leases it under certain conditions.
Why struggling to get an answer in the english section of the forum, we also have a german section 
Hallo Slacki,
schick mir gerne eine Mail an bk-ve@gmx.de
@BjoernK
danke Björn ! Hab dir gemailt
Es wäre schön solche Diskussionen/Fragen hier in der Community zu klären, da haben dann vielleicht auch andere etwas davon.
Deswegen ist auch die Möglichkeit für private Nachrichten deaktiviert.
Wir geschrieben, gibt es ja auch einen deutschsprachigen Bereich.
ich werde mein projekt gerne im deutschsprachigen bereich vorstellen.
einzelheiten können dann gerne da diskutiert werden.
im moment bin ich verloren in lauter technischen begriffen und totaler neuling.
EINEN kometenten ansprechpartner wäre mir da lieber.
Dafür gibt es ja auch noch die Distributoren, Händler und Installateure:
https://www.victronenergy.de/where-to-buy
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