Hi just want to know I have 2 x Pylontech 2.4KWh batteries installed , working great, can I add 3.5KWh batteries to the same pack or should I make a new pack connected to the same charge bus on the same inverter 

3.5KWh batteries are more available now

Please let me know I need to bay ASAP

Regards

Johan

Hi Johan, 

What is your current charging rate and what is the max your inverter can do? 

Note that your current fuses etc probably covers only two. So if you combine it they will need upgrades. 

Yes I'll check that, but will they work together and charge and discharge the same just with more capacity, Will they equalize ?

@Kite Do a search for pylontech on the forum.

A few guys have asked this and was successful with their installations.

All your possible queries will be answered.

search for this and can't find anything about different models in the same pack

 

Follow @PaulinNorthcliff

He has just finished his.

7 hours ago, Kite said:

I have 2 x Pylontech 2.4KWh batteries installed , working great, can I add 3.5KWh batteries to the same pack

Here you go: https://powerforum.co.za/topic/3541-adding-the-second-bank-of-pylons/

3 hours ago, The Terrible Triplett said:

Here you go: https://powerforum.co.za/topic/3541-adding-the-second-bank-of-pylons/

Thanks, TTT.

In summary, it seems to be a Yes, you can parallel them. Make (one of) the  US3000(s) the master, and parallel and daisy chain as with US2000Bs.

https://powerforum.co.za/applications/core/interface/file/attachment.php?id=7777

Thanks to Nicholas.

 

Works great. The batteries are already balancing nicely.

Most evidence of this is that the fully charged (combined system) voltage is creeping upwards.

Morning still not sure, do I have to put the US3000 in its own bank with seperate cables to the inverter from fthe other US2000 bank? what do I do with the coms, the US2000 bank got comms cable connecting them together, (don't have comms to the inverter setup) where do the comms for the new US3000 goes?

Please assist I need to buy and want to know which one I can buy

@Kite

Treat the US3000 just like another US2000.

- Same bank.

- Turn off the batteries.

- Put the US3000 on the TOP.

- Connect the black and red power cables.

- Connect US3000 LinkPort1 to US2000 LinkPort0.

- Turn on the batteries.

 

 

 

On 2019/05/17 at 10:08 AM, Kite said:

Morning still not sure, do I have to put the US3000 in its own bank with seperate cables to the inverter from fthe other US2000 bank? what do I do with the coms, the US2000 bank got comms cable connecting them together, (don't have comms to the inverter setup) where do the comms for the new US3000 goes?

Please assist I need to buy and want to know which one I can buy

Yes. They have to be in separate banks (connected in parallel). You can bring the two banks (one bank containing the US2000s and the other bank the single US3000) together (in parallel) at the battery disconnect/a busbar/the connection into the inverter... fused battery disconnect preferred.

On 2019/05/18 at 7:00 AM, Youda said:

@Kite

Treat the US3000 just like another US2000.

- Same bank.

- Turn off the batteries.

- Put the US3000 on the TOP.

- Connect the black and red power cables.

- Connect US3000 LinkPort1 to US2000 LinkPort0.

- Turn on the batteries.

 

 

 

Nope! Read the technical bulletin released by Pylontech (above). Actually... I've just reread the technical bulletin referred to, and there is no mention of parallel banks at all. Maybe you're correct??? But it doesn't make sense to me, and mine (which is working happily away as we speak), is wired in parallel. Dunno? 

Edited May 20, 20197 yr by PaulinNorthcliff

@PaulinNorthcliff 

Just take a closer look - it's noted on the page four: 

"If system include US3000, always use US3000 as master battery.

If without US3000, always use latest manufactured module as master."

So the correct way to do it is to put US3000 on the top (master) connect the data cables and connect the power cables.

Speaking of power cables, it does not matter if you use short cables with SurLock and make a single stack or if you use two sets of long cables and parallel the two banks. If you have just a single US3000 and 2 or 3 US2000, then I would be okay with short SurLock cables. If you have a rack full of batteries, I would use two or more sets of dedicated long cables to support the higher currents.

 

For example, I'm using 7xUS3000 in my LAB,  so I used two sets of the longer cables.

Edited May 20, 20197 yr by Youda

Good day

The above is useful thanks however I have tried to connect the US3000 as the master battery (adding to an existent bank of 5 x US2000plus). The comms seems to not be working between the master US3000 and the CCGX (Victron). When I remove the US3000 and put the comms cable (TypeB) back into the CAN port of the US2000 the CCGX picks up the original bank of 5 batteries immediately. 

Is there something I am missing here? Or should I be putting the batteries in parallel with separate battery cables to the main fuse disconnect - I don't see how this helps except possibly the internal fusing? If i do it this way then should I just link the comms cables between batteries the same way? I would be grateful for some advice

Thanks

4 hours ago, JamesD said:

master US3000

Just to conform have you set the DIP switched on the batteries to indicate the master?

On 2019/05/20 at 6:15 AM, PaulinNorthcliff said:

Yes. They have to be in separate banks (connected in parallel). You can bring the two banks (one bank containing the US2000s and the other bank the single US3000) together (in parallel) at the battery disconnect/a busbar/the connection into the inverter... fused battery disconnect preferred.

Nope! Read the technical bulletin released by Pylontech (above). Actually... I've just reread the technical bulletin referred to, and there is no mention of parallel banks at all. Maybe you're correct??? But it doesn't make sense to me, and mine (which is working happily away as we speak), is wired in parallel. Dunno? 
 

I have 3x US3000 with 3x US2000 all in parallel. I’m new to this but seems to work with 1x US3000 set as Master. All others are slaves. Only issue I get is ME3000 Inverter set to charge batteries at night with virtually free electric however I get BatOV alarm every night when bank reaches 94.5% SOC. Don’t know how to resolve this. Am I damaging the batteries? It should I separate into 2x separate banks allow BMS to control each bank. Join banks on fused isolated bus bar then into my inverter. Help needed please from anyone???

 

My experience mixing modules hasn't been a great one. Hopefully it gets resolved soon. Check my post in this thread.