The pylontech batteries are supplied with 25mm2 cables.

How many pylontech US5000 can be connected in parallel with the supplied cables as the more batteries you connect will increase the amperage and there is no way in increasing the cables due the the way pylontech batteries connect.

@Coulomb could you please assist me with this question?

 

The Pylontech cables are rated for peak current capacity 120A, constant 100A.  You can connect pairs of cable based on the calculation of system current required. So if you need more than 100A constant just connect another set to the remaining 2 open terminals on the batteries to distribute the load between the 2 pairs of cables.

Edited May 29, 20224 yr by Nexuss

1 hour ago, Nexuss said:

The Pylontech cables are rated for peak current capacity 120A, constant 100A.  You can connect pairs of cable based on the calculation of system current required. So if you need more than 100A constant just connect another set to the remaining 2 open terminals on the batteries to distribute the load between the 2 pairs of cables.

@Nexuss Appreciate your response

 

11 hours ago, Pieter Maritz said:

The pylontech batteries are supplied with 25mm² cables.

I've always thought that the cables supplied were a bit on the thin side. Now that the batteries can supply 100 A continuous, it's even worse.

11 hours ago, Pieter Maritz said:

How many pylontech US5000 can be connected in parallel with the supplied cables

25 mm² is good for about 100 A, so that suits a single battery nicely. A 5 kW inverter can draw about 117 A according to a typical sticker, so at maximum power, one set of leads is too small. Of course, one battery won't supply more than 100 A for long, so the supplied cables are adequate for one battery. With two batteries and a 5 kW inverter, I'd use two sets of leads, as @Nexuss suggests. The two cables will be good for 200 A, which is enough for about an 8.5 kW AC load. Three or more batteries would be capable of supplying 300 A or more, but unless you're running with a combined rated inverter power of more than 8.5 kW, the inverter won't draw more than 200 A anyway. So doubling up the cables, which is possible with the supplied connectors, should be fine unless you have a really large inverter setup.

Even two 5 kW inverters in parallel would be OK, if you really could not envisage loads exceeding 8.5 kW for more than a minute or so. Of course, it's never a good idea to make such assumptions; circumstances may change in future, and you will probably forget the constraints built into the system. Even then, you could limit the output current with a suitably rated AC breaker (e.g. 40 A), which will limit the battery continuous current. AC breakers are a lot cheaper, smaller, and more convenient than DC breakers on the battery side.