Beautiful structure …
… if only it weren’t for that damned water connection …
but fortunately there are large gray “metal cabinets” to put on top … Lucky us.
Have fun with the rest of the assembly and the system in use.
I wish I had that much space available at home. Unfortunately not. Still going to add a Victron 3-fase setup for MultiPlus II 48/5000. And I noticed that you’re not using the AC-OUT-2 I’ll plan on doing the same.
I was told that AC-IN is bi-directional and that this would be enough to charge/discharge the batteries from/to the grid.
Applologies if this is not the right place to ask, but it’s only my first day here
Which rack slides or mounting plates did you use but the battery.
I cannot find some with load capacity of 120kg that fit into my APC NetShelter SX 19” rack cabinet.
First wauw! What a clean setup. I might steal some of your design for my home.
I’m in the process of designing my own 3phase ESS system. However when I read the MP-II manual it states that i need to fuse off the inverter with a 200A fuse, and need a 70mm² cable. I notice you have placed the 200A fuse, but are using 50mm² cable. Following the Victron cable guidance a 50mm² should only be allowed for a max of 150A.
So you should lower the fuse to 150A or increase the cable to 70mm². (Or am I missing something?)
I intend to modify a 3 phase system that I have at the moment at home (a Huawei 3 phase system) and was thinking to take the Huawei down and install 3 Victron Multiplus II.
What is the role of the Fronius there and what it’s his advantage ( I read about AC coupling but it’s still hard to understand the real benefit)
AC-coupled PV inverters are most efficient to for direct usage, e.g. your air cpondition or PV surplus charged EVs. As Victron does not supply PV inverters, Fronius is the choice which is officially supported.
Victron supplies PV battery chargers, e.g. the Smart MPPTs and RS 450, which are most efficient to charge batteries via the DC bus (48V).
The MultiPlus 2 converts 240V AC to 48V DC and back:
AC→DC: charge battereis from grid or PV inverters
DC→AC: supply AC loads from battery or PV chargers or sell back energy from battery to grid
The Multi RS is a hybrid PV and battery inverter/charger.
Basic rules with Victron gear:
use PV inverter to cover your base load and managed loads e.g. EV or PV surplus water heating
use MPPTs/RS to charge batteries
for on-grid/ESS, use battery inverters (MP2, Multi RS) to cover your critical loads (grid failure) or peak grid feedback demands (DESS)
for off-grid, plan battery inverters to cover your full peak load (or plan PV inverters for managed loads)
I use several micro grid inverters (Hoymiles HMS-2000) on AC-out1 of my 3-phase MP2 5k due to heavy shadows and one MPPT 150/45 to have black start capability for my DESS. Works great.
The Fronius (PV inverter) will substitute the Huawei.
You can stick with the Huawei and put MP2s in parallel (AC-in). With a Cerbo/Ekrano and a grid meter, a 3 phase 3xMP2 setup will try to keep 0W at your grid line charging surplus PV to batteries and serving house loads from battery if load is higher than PV, e.g. during night.
