Pylontech / Victron inverter questions - relative newbie

[Tinbum]

Another consideration is that the BMS (Pylontech Battery Management System) will often limit the charge current - especially if the batteries are outside of a certain temp range.

This is not specifically for the C battery, but could be but gives a good idea how Pylontech do it.

[nowty]

Another consideration is that the BMS (Pylontech Battery Management System) will often limit the charge current - especially if the batteries are outside of a certain temp range.

This is not specifically for the C battery, but could be but gives a good idea how Pylontech do it.

That is something to think about if placing your batteries outside, especially if your building up a DIY battery.

[Justme]

The "Victron MultiPlus-II 5000VA" has a battery charging facility of only 70A circa 3.5kW

The "Quattro 48/8000" has a battery charging facility of 110A circa 5.5kW

Therefore both won't charge at a rate of 7kW as you want but in any case you wont be able to exceed about 100A 5kW with the standard cables unless you parallel up two stacks.

This link gives you some info about using the Pylontechs with the Victron kit including how to parallel up two battery stacks.
https://www.victronenergy.com/live/batt ... export_pdf

This is incredibly informative, thank you.

Do you know if there is a Victron product that will be able to pump in my 7KW. Maybe this is folly, but the way I saw it was if I can pull in a max of 7KW on a 32amp connection, I may as well do this. However if it increases complexity perhaps I should rethink it.

When you say 'with the standard cables' can I just upgrade the cables, or does this create a new host of issues (e.g. connectors are custom or something- sorry, I do not know which cables you are referring to)

But it certainly feels that the Victron MultiPlus-II 5000VA does not fit the bill, I had a look at the 10000VA version of the MultiPlus-II, and think i've worked out that would give me 140a which should be about 6.7KW of power, thats close enough for me I think - am I right in that assumption?

I would parralell 2 multiplus II 5000.

Infact I have done so.

Very recently had one fail after about two years.

Both replace under warranty as they need to be identical.

However the benifit of using two is while the two replacements were delivered I could change to a single unit system & keep the off grid house running.

[SafetyThird]

Another option might be a pair of luxpower squirrel pod inverters. They charge at 3.6kw and can be paralleled to give 7kw charge/discharge with two units and 10.3kw with three etc. I’m in the process of installing a single squirrel pod with 4 us3000c batteries and one reason for this setup was the ability to add more batteries and a second inverter easily if I need it in future.