although I already did some countermeasures to reduce the hum noise of my MPII 5000, the wish of a more quiet inverter still exists. As a consequence, I think about replacing the MPII and the external 250/60 MPPTs with one Multi RS Solar 6000 - inspired by Multiplus II 48/[5000|8000] Transformer Noise from Grid - #51 by Vladyslav_Kh
I read the specs multiple times and it seemed, that some early Multi RS limitiations do no longer exist, at least for a grid connect in Germany (ESS/DESS support). The Cerbo GX and the VRM DESS functionality should remain.
Why do i think about doing that change?
Get rid of the inverter hum noise
Reduce external DC cabling to a minimum
My Setup
Two PylonTech US5000
2 PV strings, each 5 modules 450W
DESS with Tibber
Cerbo GX and VRM
MPII 5000
2 MPPT 250/60
Any recommendations or own experience?
Am I missing something?
Will the Multi RS Solar be quiet?
@B51-technician
I have an almost identical PV configuration, only that there are two strings with 5 x 460W each.
Each string is connected to a different MPPT input on the Multi RS.
Only that I donāt feed to grid.
Works like a charmā¦
And much quieter than a MP2-3000 that Iāve also tested.
@lxonline
It has a transformer alright, only that itās a HF (high frequency) transformer.
HF transformer with primary and secondary windingsā¦
Why people say about HF inverters that are transformerless?.. Maybe because they are so small?
And they also make noise, but itās so high in frequency, that one doesnāt hear themā¦
Correct was too sweeping with the statement. There will usually be some kind of transformer device.
More correct statement is there is no really big (and very noticeable) transformer in the MultiRS as there is in the MP2 range.
Hi all,
Iām planning to get a multi RS Solar 6000 too, but Iām a little concerned about the input amps of the 2 MPPTs, datasheet says:
Maximum operational PV input current limit 13 A
Maximum PV conversion power 6 kW total ā 3 kW per tracker
Maximum PV short circuit current 16 A
Iām planning to upgrade my solar panels too, but a modern bifacial panel( jinko, JAsolar,aiko,ā¦) has a pretty low voltage and high current, for example the JAsolar jam54d41 440w has a Isc of 15.55A at 10% irradiation on the back side, it can in theory go over 16A.
My question is, will the MPPT clip at 13A or 16A (anything above is āoversizingā)? Or will it go in an error and shut down? Is this high current safe for the MPPTs?
If low voltages on panels, then go on putting them in series.
A āconsumerā as the MPPT is for the panels, will draw only what it wants.
Those limits for MPPT are especially for reverse connection.
There are a few topics on here about oversizingā¦
The 450/100 has better specs as far as current and power. I donāt know what the voltage of your string will be but if you could put 15 amps at 360V MPP would be over 5000W per string. I have an east and west array on one of these and get 100A of charging most of the day. In the morning the east is doing 11A and the west is only doing 1A. In the middle of the day they sit around 7A and the west takes over in the afternoon.
ok, convinced, @alexpescaru Multi RS Solar 48/6000/100-450/100 is ordered. Will deliver feedback after setup and test.
Just realized, some parameters are slightly different from a MultiPlus II setup. Some settings match, Sometimes different parameter designations are used and some parameters exist for a MultiPlus but not for Multi RS and vice versa.
I have a Cerbo in the system and then it will take control through the DVCC.
So those values you mentioned will be there only for safety, being disregarded when the DVCC is acting.
But, they are as follows.
You may be surprised that all are the same voltage, but with the LiFePO4 batteries, thatās it.
There is only one voltage, the one requested by the BMS, which knows what to do with it.
Consistent information about the RS 6000 is somehow hard to get. I replaced my MPII 5000 setup including two 250/60 MPPTs with one RS 6000 unit.
Hereās my experience, pros and cons
It does not have the 50 Hz hum like a MPII
The MPPTs, however, need active (fan!) cooling beyond 1400W
My 250/60 MPPTs have been 100% passive and quiet
The two inverter fans are not as loud as the single MPII fan
DC cabling is reduced to a minimum
The display shows a lot of useful information
Victron Connect is used instead of VE.Configure for configuration
Confusing universal European grid code, missing specific grid code for DE. Talked to my Victron dealer and he asked Victron for clarification. The answer was āwill be available in upcoming VictronConnect versions soonā.
The device is significantly lighter, about half the weight of the MPII (without MMPTs).
More space for large DC cable lugs
The biggest disadvantage from my point of view
ESS and DESS is supported, but very basic
Multiphase Regulation is not supported
Multiphase Regulation might be available sooner or later but there is no specific date published yet. The RS seems to be a separate project with own timelines on Victron side. The missing Multiphase Regulation together with the active MPPT fan cooling were the decisive factor for me to build back my system tp MPII with two external MPPTs.
A somewhat irrational thing to end on ā¦ I indeed missed my two heavy but quiet MPPT steam-gauges
Multi RS Solar 48/6000/100-450/100 is ordered. Will deliver feedback after setup and test.
