Hello everyone,
I have some thoughts about a new build Ess
2 options for this 3fs system.
3 x multiples 2 48/5000
30 kWh battery bank
1 smart solar mppt 450/200
Or
3 x multi rs solar 48/6000/100
30 kWh battery bank
Any thoughts about the difference on Ess and grid feed back.
Battery banks and mppt are designed to expand the system in the future.
17 pv modules of 440 w peak possibility to enlarge to 28 panels and 60 kWh battery bank.
Consumption is 20 kWh a day average.
With 3 Multi RS’es you’ll have 6 HV MPPTs, instead of just 4 on the MPPT RS 450/200.
Also it seems that good things will come for the Multi RS users in the near future, as well as firmware is concerned.
Thanks for the answer, but what is coming?
Feed-in ability and hopefully parallelization. 
Feed in is not an option right now?
Not with Multi RS.
Rumors say that in a couple of weeks will be.
But you know what they say: Promettre c’est noble, tenir c’est bourgeois…
That is strange because in de demo function on the Victron connect app it is feeding power on the ac input side
So in my case the second option is not the right one for now
If you aren’t adventurous fellow, I would stick to the proven and endlessly trialed MP2 system. Mostly you get the same end result but you don’t have to hope for future firmware upgrades and also have a lot of ready made systems to aspire ideas from. Proven platforms are popular for a reason.
Thanks for your opinion.
I know the MP2 is a proven system, but I was looking for a new way with a slightly higher output (6000VA instead of 5000 VA) that how I got the idea. But maybe that is a big adventure. Many I will ask Victron when the new software release is expected. The are right around the corner for me.
Also I planned to have 2x 450/200 when I started to plan my system(11,2kWp AC Fronius + 26,4kWp MPPT and 80kWh LiFePO4), but ended up choosing 3x 250/100 because of the much better flexibility to overpanel my PV array with 60 panels(30m vertical solar fence with 2 layers since Chinese 440W bifacial panels from the factory are cheap as soap). This scale of overpaneling was not possible with the 450/XXX MPPTs. This does need the extra combiner boxes and extra wiring, but IMHO worth it. Also, not a fan of residential 450V solutions at home.
That is why I chose the multi, because they have galvanised seperation in the HV system etc.
But your right, 250 v dc brings less damage than 450 dc when things go wrong.
I have system you are describing: 3xMulti Rs Solar and 30kW battery bank.
Pluses:
pay attention there is RS version with 2 inputs but one tracker insideMinuses:
I found it as amazing system for home. I have 3 pv arrays connected, each on own inverter. Works amazingly well.
Multi RS is not approved in all markets yet.
Specifically: not yet in Belgium. Others, no idea.
I have contacted Victron, they are working on the approval but they don’t know yet when it is done, the good news is, it is coming!
Yeah, but Belgium (Synergrid) can take years to validate 
I’m waiting & hoping for a fast approval of the Multi HS19
Multi HS19 was announced 2 years ago…
Still not available to buy… 
They told me it will be available in Q2 2025
We’ll see in 9 months… If it’s a boy or a girl… 
If no short term plan for the feed-in - MultiRS is a way to go.
Architecture of it is a High Voltage PV is DC directly converted to AC, which gives highest efficiency possible.
Achievable on MP2, only as AC coupled with grid inverter, like Fronius.
But if experimenting or waiting is not for you - MP2 is a way to go
For me the multi RS efficiency over the mp2 wins every day hands down.rock solid in three phase.
