First time forum "poster" here 🙂

Not sure if this question have been asked in the forum before, I currently have 6x 3000 and 2x 2000Plus Pylontec batteries (total 😎 hooked up to a Sunsynk 8kw inverter. I do believe this is the max total for a single battery bank configuration. I would like to expand the battery bank with either one or two additional 3000C Pylontec batteries. Would I require Pylontec HUB to achieve this or would it be the acceptable to add the one\two additional 3000C to the battery bank, seeing that the 3000C batteries can be configure with max bank size of 16 batteries? Obviously a 3000C to be master battery. 

Any advice or guidance will be much appreciated.

1 hour ago, Fred79 said:

First time forum "poster" here 🙂

Not sure if this question have been asked in the forum before, I currently have 6x 3000 and 2x 2000Plus Pylontec batteries (total 😎 hooked up to a Sunsynk 8kw inverter. I do believe this is the max total for a single battery bank configuration. I would like to expand the battery bank with either one or two additional 3000C Pylontec batteries. Would I require Pylontec HUB to achieve this or would it be the acceptable to add the one\two additional 3000C to the battery bank, seeing that the 3000C batteries can be configure with max bank size of 16 batteries? Obviously a 3000C to be master battery. 

Any advice or guidance will be much appreciated.

Yep, you will need the Hub but if I was in your position, I would sell the two US2000 Plus and one US3000, then replace them with three UP5000  

I don't know that you do. The US3000C can have 16 batteries in a bank and I think that applies even if the others are not a US3000C.

4 hours ago, Tinbum said:

I don't know that you do. The US3000C can have 16 batteries in a bank and I think that applies even if the others are not a US3000C.

I disagree with your statement, US3000C has DoD of 95% but when mixed with US2000,you lose that and your bank will now take the US2000 DoD of 80%. Using the same logic, 8pc for a stack of US2000 will be the safe bet if you mix with US3000C. I stand to be corrected, always plan for the worst case if not 100% sure. Alternatively, contact Pylontec, it would be interesting to know if you can still get to the 16pc even though you have two US2000plus in your bank. 

4 minutes ago, hoohloc said:

I disagree with your statement,

 

Alternatively, contact Pylontec, it would be interesting to know if you can still get to the 16pc even though you have two US2000plus in your bank. 

? ?

13 hours ago, Tinbum said:

? ?

I disagree with this statement ''I think that applies even if the others are not a US3000C''  . This is an assumption and mine differ based on the logic as explained. You might be right and I might me right, so the best way to tell who is correct, is for the OP to contact Pylontec support and find out. 

18 hours ago, Tinbum said:

I don't know that you do. The US3000C can have 16 batteries in a bank and I think that applies even if the others are not a US3000C.

Looks like you were correct, just got confirmation from Pylontec, max is 16 and your master battery should be the US3000C

If you mix use US2000+ and US3000C in one group, the max. number of the battery in this group is still 16. But as the master must be US3000C and the address of US2000 is only 8, so the max. number of US2000 in this group should be 7 and they must be put in address 2 to 8. The 16 batteries will be in the following order:

Address 1: US3000C(master).

Address 2-8: 7 x US2000(slave)
Address 9-16: 8 x US3000C(slave)

1 hour ago, hoohloc said:

Looks like you were correct,

It doesn't look like I was correct, I was correct.

 

I knew that I was right in what I was saying but as I couldn't find where I had seen it in the Pylontech documentation I didn't want to quote it as gospel. Unlike many on forums I like to make sure I am correct in what advise I give and I work on knowledge not perceived knowledge.

 

I've found where it said it and it couldn't have been any more obvious- it's on page 5 in the manual for the US3000C.

If you are mixing US2000 (50Ah) and US3000, and the recommended charge / discharge is 0.5C, then your us2000 should discharge at 25A and the 3000 @37A...

How is this going to affect your charge/discharge if they're in the same group?

Depending on your cabling, you might have to go through a BUS bar and group the batteries as in the attached pdf (as an example).

PylontechGroupOf6.pdf

As OP was asking about the hub I'm assuming he is using the communication between the inverter and the batteries. Your example would require a hub.

I'm not sure how pylontech control the mixing of different battery sizes, perhaps it's limited to the max the smallest battery can accept x number of batteries.

When I expanded my setup I was offered the brand new US5000 batteries but I opted to stick with the US3000C and keep all the batteries the same size. Saying that, my inverters wouldn't be able to output the required current to exceed the max recommended for even a US2000C because of the number of batteries I have.

In this case, his inverter is 8kw so this may well also apply with his 8 + 1 or 2 extra batteries.

Edited February 18, 20223 yr by Tinbum