Hi
Has somebody good experience with the Victron MPPT RS 450/200?
I am planning to expand my PV system (currently 2 strings with 10x300W panels each, AC coupled via Fronius IV) to be able to black start my system via DC-coupling. First I want to add 7 panels with 400W (25V). Later more. As the 450/200 has 4 Trackers I am in favor of it.
Some special thoughts?
I want to connect it to my 3p Quattro System (5000VA) via the 1000A busbars - 8 US2000C batteries.
Thanks
My DC system is 48V based. The 25V were in regards to the PV panels :D
But if you are really want to use the RS my advice is to use 2 No.'s 450 100 instead of one 450 200.
Otherwise, stick to the AC coupling just rewire the Fronius to Output-1 of the Quattro and connect the load to output-2 (since it is controlled) of the quattro and cut off the load at 15% SOC for Victron to form the grid for Fronius to start.
Hi @Sesshoumaru,
It's a powerful unit, and has a minimum start up voltage of 125V, so make sure that your panel array configuration is compatible by using;
https://mppt.victronenergy.com
You might find there is a more suitable model, or perhaps that is the one.
I agree that an automatic black start from PV is a good design decision, but there are many other MPPT models that also meet that criteria.
On my roof I haven't yet used all the possible string inputs of my 450/200 MPPT, perhaps another array next year.
So it might be better to go wth 2x MPPT RS 450/100. Also considerng fail-safe system. I also plan to grow in steps, so it sounds more pausible to go with the smaller unit.
That will require considerably more physical space though.
I am a master of penning up things. I hope I will get that done.. and also add another 20 kwh of battery.
Interesting setup. I like the RS 400 MPPT chargers.
Out of curiosity what brand of 400 solar panels produce 25-volts?
If you use DC circuit breakers and DC ground fault devices, do they work with more than 300 volts DC?
