A system I want to show that we are currently working on in Cluj, Romania. We are in fact building it at our home base and then it will be lifted ready to the customers site 100km away.
What you see in the pictures so far:
12 x 15KVA Quatrro units
2 x 5000A aluminium busbars (Schrack Technik)
12 x ETI Fuse switch disconnectors
This will be filled soon with 500KW LIFEPO4 storage and the AC/DC panel. Will post pictures as it develops. The use case if anyone wonders is that the grid is really unreliable at a rural milk factory. Reason they lose roughly 10K euros per month in maintanance and spare parts for all the machinery. Obviously Swiss manufacturer refuses to replace these under warranty due to surges. The container will act as a buffer between the grid and factory. (there is also solar PV inverters involved but that is another topic).
Hi Dan,
Why did you choose a low voltage (48V) system for such power? I mean 3000A is overkill…
Did you tried to see if a high voltage solution will not be much better?
For sure from efficiency point of view it is…
At least this is what they say all over the web, didn’t designed myself such thing.
There’ve been a few points considered. The most important being the use case. There are sudden dropps of grid, surges and sometimes demand spikes.
poor power factor
ups feature
power assist
We can correct all these using the Quattro’s. Not to mention the automations which are limitless here. The chinese out the box BESS solutions can’t handle these or only partially solve. Most being parallel solutions. Not a true UPS.
From an efficiency stand-point if you always cycle the bank, yes, it is more efficient. Here however the bank has a buffer role.
The financial aspect is also important. Compared to a ready-to-go 500kw container the budget is half, including the assembly man hours. With the advantage we are building it to local regulations (ANRE anti-islanding) and designing the panel to integrate everything the customer has there currently. Basically we are custom building it for the customers needs and particularities.
We are doing this pilot as we want to do a lot more of these in the future and it being an EU designed and assembled product has a lot of advantages.
Are you not concerned about heat? I see a mini split on the back wall but with the Quattros mounted basically at ceiling height I would think heat soak in the units could be an issue no?
DC grounding onto the Quattro chassis stud. The AC input and Output have their own Earth. Rated to ensure that if there is an Earth fault on the AC side the MCB will trip.
So in our case we have 25mm Live & Neutral Tails for AC - In & AC - Out. With a 16mm Earth In and Out. Protected by 100A MCB’s. So AC wise we are fine.
Good point from the unlimited part. However, from field experience of team with other industrial equipment in our opinion it is overkill. However, if this becomes a certified product, this being a pilot one. We will seek clearance on this topic from PM. Maybe they can clarify on this thread as well.
