Hi everyone. I recently came across this Multiplus-II 4k5. Could someone explain what’s special about this device? I can’t quite work it out. There’s also a bigger brother, the 6k5.
Thanks in advance for your help.
Cheers, Peter
It’s just a new model in the MultiPlus-II range, positioned between the 3000 and 5000 models.
The k models have higher continuous power ratings.
Just compare the data sheets.
Interesting bit — if I’d known it existed three weeks ago, I’d have bought two of them instead of the 3000 for a project.
The problem — at least for me — is that the 3000 has too little charging power.
But take a look here at the last line highlighted in yellow:
Wouldn’t have mattered in my case.
You didn’t need to advertise a retailer here for that. You could simply have said here that the MPII-4k5 isn’t certified yet. There are already other retailers offering the thing for almost €100 less. Even so, you can still find the MPII-5000 for less than the cheapest offer for the MPII-4k5.
So, the question is: does the MPII-4k5 have any other advantages over the MPII-5000 besides its more compact dimensions and lower weight?
I think that once the certificates are available and demand increases as a result, the price will come down a little further.
At the official list price, the 4k5 is only €16 more expensive than the 5000, so there should be hardly any difference on the open market.
https://www.victronenergy.com/media/pricelist/Pricelist_Victron_EUR_C_2025-Q4_Web.pdf
You didn’t need to advertise a retailer here. You could simply have said that the MPII-4k5 isn’t certified.
Dear Tom,
What exactly is this comment supposed to mean?
I’m not advertising anything here. After reading about it here, I was simply interested in the thing — so I found the shop that was linked.
If I’d simply said it wasn’t certified, someone would immediately have said, “Please prove it<”
What makes you think that? This is about Victron; no one needs to prove which certificates exist and which don’t.
So are those also better suited for backup power, by comparison, or am I barking up the wrong tree?
Hi Matthias,
I think you’ve got it mixed up 
the GX version costs €16 more.
MultiPlus-II 48/4k5/55-32 RRP €769.00
MultiPlus-II 48/4k5/55-32 GX RRP €905.00
MultiPlus-II 48/5000/70-50 RRP €889.00
So the 4k5 costs only 86.5% of the 5000. The lowest price I found for the 5000 is €551.77 net. If dealers pass on the prices in the same proportion, the 4k5 should therefore cost around €480 net.
That would make sense to me, since with the 4k5 I get less power and higher standby consumption, if I’m reading this right.
Here’s my comparison on photovoltaikforum.com. If I’ve missed something or interpreted anything incorrectly, I’d be glad to have it explained 
The certificates have been around for a few months.