Hello dear community, I have created simple (very simple) scheme of my planned victron 3 - phase home system. My questions are:
Can I use only distributors or I need something else? or this is good as it is.
every connection to busbar(distributor) is fused with fuse, is this ok? or should I also use fuse somewhere else? or somewhere not to use and is only optional?
cable length from batteries to distributor will be original pylontech 2m cables (each battery has its own cables), this is ok or something wrong? I know wiring like this has more cables but each cable is rated at aroung 100A and so if I use more cables I didnt see anything wrong with it but correct me If I am wrong.
Cables from distributor to all 3 inverters have to be same length or not? (for my opinion same length have to be from distributor to each inverter separately only) so first inverter has 2m (both + -) cables, second 1m both and third 2m both. This is ok?
I saw installations where cables from MPPTs were stacked together in busbar (one eye on top of another eye and bolt together) so this solution dont get much space in busbar, is this also ok or something not recommended?
I didnt use battery breaker on + side of cable because many ppl dont recommend them as they are can be source of heat and more connections, resistance, not reliable(many reasons)… Is this something mandatory or only option to use them (to have installation without them)?
There is no communication cables in diagram but of course they will be there
For this whole installation and wiring - it will be done with help of person with electrical skills but as there are many options how to install and how ppl do the wiring I want to be sure for right procedure (what to buy, what is only option and mandatory).
Thank you for answer
Hi! Late answer, but might help. Iam just building up a similar system.
Question 1: Yes, I do the same
Question 2: Fuses are needed to save cabling, if you don’t have some inside your Pylontech (I don’t know your “Pileo”(??translation?)
(Max load ..Amps.. are normally controlled also by BMS… but it’s good to have some at Lynx if sometrhings going wrong)
Question3 and 4: Different length are always no problem if dimensions are correct,
and yes using a pair for each battery pack or inverter cold be cheaper than using 1 very thick wire
(Battery pack!) with may be connetion problems (M10 or M8) at Lynx .
BUT I have to remind you, although I am sure you think about: Communication between your Pylons needs to work (1 Master and 3 slaves)!
Question 5: I would not do that. At these connections (stacking) you will have the most resistance (connection). If you have less Amps it might be OK.
But what about the fuses for each MPPT?
Question 6: Whenever your working at your busbar (Lynx) it should be without any power!
For some reasons only the MPPT to battery should have connection (save setup) OR only inverters should have (without loads from MPPT)
…yes, thinking about a setup for communication loss.
Too late today…
Have a nice weekend!
Amps, cables or so called “wiring”…a very good handbook is the Victron one, called “Wiring_Unlimited” I advice you!
At least: You wrote “communication cables not in diagram”… Every system needs to be secure if communication might be down.
And yes, BMS secures the packs (shut-off at min cell voltages).
I forget: You’re using 3 MPPT? I don’t know your Voc nor knowing your panel strings. Isn’t it cheaper to use a RS 450/100 or 200?? (instead of using 3 MPPT)??
A very good way to calculate is the very helpful Victron MPPT calculator (own panels possibel)
