I’m getting ready to replace our aging 24V system with a new 48V setup based around the Multiplus II 48V 5K and 6-8 Pylontech US5000 batteries. I was planning on using the RS 450 MPPT charger (not sure yet if 100A or 200A) but was surprised to see a lot of people having issues (error 200). Is this still an ongoing problem or has it been fixed with a firmware or hardware revision?
I tried searching for an answer but didn’t find anything.
Most of the reports you find should be 1, 2 or more years old.
From our experience as installer/distributor I can say that most error 200 are caused by the user due to wrong installation.
We installed a few for customers and also have some running in our office/workshop, all running without issues.
But the HW and SW also has been improved.
I’m surprised at your answer. I mean, it’s just a charge controller – you connect the batteries & PV cables & set the charging voltages. How can so many users, especially professional installers, make the same error that would fry the most expensive PPT controllers generally available?
To high PV voltage, wrong configuration, wrong/no communication with the BMS (the BMS cuts-off charging during full power)…
That’s from our experience.
We had almost no issues with the systems we installed ourselves or that we had planned for the customer from start to finish.
Single phase Off-Grid system:
2x MPPT 48/200 RS, Mp2 8k, 8x UC5000, cerbo GX, 4k diesel genset
Is running for over a year without any problems.
Configured according to Victron´s specifications out of the box.
The only thing that causes problems is the brand-name diesel generator.
I assume your 4K generator is not an inverter type unit, correct?
super silent 1 phase diesel genset with AVR,
no inverter type!
Yeah my neighbour had a similar genset (Kubota 7kW) and had issues with his inverter. All issues went away when he switched to an inverter type genset. Non-inverter gensets do not produce the cleanest power.
I’ve always worked exclusively with 450/100, and occasionally with 450/200 (I prefer 2X100).
Never had a single warranty or non-warranty case, perfect every time!
Finding a single-phase quiet diesel generator was not that easy.
Although it is a well-known brand, there are problems with starting and running smoothly.
Inverter gensets usually regulate the speed, and these cannot respond very well/quickly to sudden load changes.
The diesel runs just below the COP point.
I’ve been using the Yamaha EF4500iSE (4kW COP) for many years. Actually, I have 2 of these Yamaha units. One has about 7000 hours (mostly battery charging hours) and the newer one has maybe 1000 hours, but I’ve put it away and am using the old one until it dies before continuing on with the new one.
The off-grid system has 33 hours of generator runtime in 1 1/4 years.
The 7000 hours will not be reached so quickly 
Yep, that’s what I’m striving for. My system dates back to the mid 1990’s. We have a Trace SW4024 that has been running strong for 30 years. It’s connected to 12 x 2V 960AH batteries. Solar was crazy expensive back then and we went almost 15 years being severly “under paneled”, hence the generator hours. Our system is better balanced today but our FLA batteries are coming up to 16-17 years old now and drinking a ton of water so I’m in the midst of planning the migration to 48V. I will need advice on that but that’s for another post.
A Trace 3024 was previously installed here in the system. I also asked several times how long the inverter had been in operation. Outback PV inverter, 2400Ah OpzV.
Considering its age, the device can do an incredible amount. Apparently, it was the model for the Multiplus. In the end, everything was replaced: PV, inverter, battery, etc.