Pylontech US2000B US2000C FAQ Follow-on
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- Опубліковано 23 лип 2024
- Pete responds to some comments and questions about his original Pylontech US2000C / US2000C Installation video. Including Link cables, DIP switches, Run light meanings, CAN Cable and BMS Problems, and Battery Balancing.
🔸 To purchase the adapter - www.ebay.co.uk/itm/334657045876 - This is version 2 of the adapter using PCB and custom enclosure - it can be used in reverse too.
🔸 The Original Video • Installing Pylontech U...
00:00:00 - Intro
00:01:02 - Link Cables
00:02:00 - Run Light Flashing
00:02:31 - Dip Switch changes
00:04:07 - Balancing
00:05:03 - Balancing Lab experiment
00:17:00 - CAN Cable changes = BMS problems
00:18:20 - Making a US2000Bcable to US2000C Battery Adapter
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Watched Pete's video on UA-cam as I was having 'CAN not OK' issues when I was connecting my existing 3 x US2000 batteries fitted to my Solis 4G inverter and I had now purchased a US2000C and need a cable to make this the master and bought Pete's adaptor which works perfectly and the instructions supplied were excellent. Took me 2 minutes to have it up and running. I might add that neither SOLIS UK not PYLONTECH were very helpful so thank you again Pete.
glad it worked out, and thanks for the feedback
Being the proud recipient of one of these adapters, they work perfectly. My 2 new US2000C batteries are now talking to my inverter, with my original US2000B or Plus at the end of the daisy chain. Many thanks again Pete for all your help!
Great to hear!
New stock on ebay www.ebay.co.uk/itm/234982424825 It seems demand is falling so I've only made another 10.
This is version 2 of the adapter. It is PCB based and reversible. As I said in the video, if I made many more I would use a PBC, a custom case and also create an automated test-jig, you can see the video of the automated test jig on this channel if you like
Great tips for adding a battery. I originally had 3 US2000 batteries and have now added a US5000 battery. Following your advice on this video and your previous Pylontech video, I successfully balanced the batteries and increased my capacity without a problem. One problem I might have had if I'd not watched this video (which you thankfully posted a week before I received the US5000) was the CAN cable communications issue you mentioned. I therefore bought your adapter and am pleased to say that it works fine with the US5000, saving me BMS issues that would have baffled me if I'd not seen your video.
Thanks, glad it helped.
Thanks very much for this explanation!
No problem
Excellent informative video and answered a few questions I had. I have 3 x US2000 batteries fitted to my Solis 4G inverter and I have now purchased a US2000C and need a cable to make this the master before I can install this to my stack, so I will buy your adaptor as it should work to solve my issue (have requested a cable from my installer and Pylontech and Solis with no results from them).
Glad it helped
For those asking about adding a 3000C to a 2000B/C group - yes you can, it goes in as master and is balanced etc exactly the same - it just has more capacity not more voltage!
I have a sofar ME3000SP Storage converter with 2 x Pylontech US2000 Plus batteries. I want to add 2 x US5000 to get my storage close to 15Kwh but suppliers are telling me I can’t mix generations. I’m assuming a US2000 Plus is an older generation to the B and C? Can I add 2 x US5000 to my existing set up with one of the US5000 as the master battery using your canbus adapter? Thanks Ger
Quite a few people have added US5000 with other types, however be aware the discharge depth will be limited to the worst of the batteries and the Sofar inverter almost certainly does not know about even a US2000C let alone a US5000 so it will just look like a US2000 with a lot of capacity. My stack comprises a US3000C, 2x US2000C and 1xUS2000B with the US3000C as master and it works just fine with 80% depth of discharge. Not sure if Pylontech cover it in any of their support pages but if you want to be more confident I would look around at some of the other people on youtube who have put them in. My sofar inverter cable works without an adapter on both the old and new batteries so I would try it before buying the adapter. I cant quite remember but the plus was around at the time when there was rebadging of the 2000 and 2000B, I found it all quite confusing until I realised it made no effective difference to the inverter except the comms pinout that changed at US2000C. The other thing to be aware of is the charge limitations of the inverter, I suspect the ME3000 can charge at a maximum of 3kWh irrespective of generation so are you going to be able to get them to maximum charge?
@@MakeOrRepair although I have a 3.96kwh Solar setup, realistically it’ll give me 3kw at best so in the summer months I might get full capacity occasionally, my main reason for investment is to go for an economy 7 tariff in the winter and charge the battery stack up through the night and run off the stack during peak times so 3kw charge over 5-7 hours should be ok. Given the limitations of the existing set up will hinder the performance of the 5000 would 2 or 3 x US3000C be a better option?
@@gowithgerdrivingschool8552 Hard to tell. I would say it depends on the mix of daytime and overnight tariff. I use octopus go which gives me 4 hours of low cost overnight without too bad a daytime price and also there is nothing special in terms of installation, the price simply changes at 00:30 to the lower level (you need 1/2 hourly smart meter readings). In the winter out usage is very high as we have 2 outside buildings to keep about 15C, so as well as charging batteries we do washing, dishwashing etc overnight in the winter, we also have a modern storage heater in the lab and studio (outbuildings) that we charge overnight - essentially we use every bit of sunlight we can store. on my tariff 4hours at 3kwh = 12kWh charge maximum, but at 80% depth of discharge that is just enough to charge 15kW from 20% to 100%. In summer with about 11kWh of batteries and 3.8kw panels I find we never really run out unless we have a really bad day so I dont do overnight charging. In winter and OCtober/MArch times I keep an eye on the weather because I don't want to charge so much at night that I end up exporting the solar that I generate the next day (I am not on a FIT scheme, I get paid for export but it is a very small amount).
Any assistance and easy fixes for a Low Battery Voltage error message, which has appeared out of the blue and not been posible to resolve by someone (me) with little detailed knowledge!
Hard to know really but perhaps a few questions might help, and if I can't help maybe someone else can.
What is the voltage - should be available somewhere in monitoring software.
Is this all the time, or just when there was a large load like an oven?
How old are the btteries?
How far are you discharging them, for example if they are discharged as low as 5% then the voltage will be pretty low at that point - perhaps lower than the inverter likes.
And any details of the inverter / batteries would help.
Glad I came across your channel before I installed a new 3500c this coming weekend to a stack of 3 2000Bs. I just had it in the back of my mind there would be an issue. Pylontech are not the best in communication it seems.
I’ve ordered the adaptor so waiting for that to arrive and then do the upgrade.
Glad it helped. There is a very small chance the existing cable might work if it does not have a ground connection but it is pretty rare. Anyway, adapter is on the way tomorrow.
@@MakeOrRepair that’s fab and many thanks for making this adaptor, I think we all would be in trouble without. Also thanks for posting so quickly!
After adding a US5000 to my two US2000s my SOC lights don't flash at exactly the same time when charging, is this normal?
The lights on mine don't either. Each unit displays status independently.
Hi Peter, very interesting and informative. Could you share a link so I can purchase the Adapter?
www.ebay.co.uk/itm/234757113109 I thought I sent this before but you are still showing in my list of unanswered comments. Sorry if I replied twice!
Thanks, just ordered the adapter
Great video and hopefully will solve my problem. Before I purchase, where can I find the details to identify the series of my 4 PT 2000's please. I have no idea which they are an understand that they could literally be anything except PLUS models that are marked as such. I have had 2 2000c's for months and have had no success with either of my inverters. The 5kw Axpert VMIII is running RS485 to 4 x 2000's. I would like the ability to add the new 2000c's to this stack but they refuse to work, now I know it is due to different comms cables. I would also like to be able to connect them using CANbus to my backup inverter which is Goodwe 4048- EM which used to run the 4 2000's but became a backup due to its 2.7kw max output in off-grid mode. Ideally I should be able to connect all 6 batteries to either inverter. What would you advise please? Thans in advance, Paul
Well if the Goodwe works using CANbus on the older 2000/2000Bs then the CAN adapter I list on ebay already should sort that particular problem. Regarding the RS485 I'm just about to order some boards to make an adapter for that as well, but it will take a few weeks for the factory to deliver them. I found a few diagrams for the voltronic range for Axpert VMIII so far as I can see the older custom cable connects pins 1, 3 and 5 to to 3,2,1 which is unfortunate becuase the 2000C uses 6,7 and 8. I can wire up an adapter to shift pins 1,2,3 to 6,7 and 8 appropriately if you want to try it (which is what the new adapter will do). Let me know and I will list one on ebay for you in a few days - if it does not work you can return it but you would need to cover postage (can't be losing money). If you want to try that then email me on make.or.repair@gmail.com.
See other reply re comms cables. In 2019 pylontech removed the "B" marking so B's are marked as 2000. These changes really make things tiresome. Mine had a little label on the top cover at the back giving model and serial numbers etc, but perhaps that was added by my supplier instead of pylontech.
And what happens to MPPT if it is at full power 60 AMPS / 53 V and BMS in battery disconnects this battery ? 60 * 53 ==> 3180 W of power. This is stored in toroid or toroids, if we have MPPT with 1, 2 or 3-phase design. WHere this energy goes, if battery will be disconnectred ? PWM frequency is from 16 to 64 kHz in PWM CCM. At low power and PCM is freq. even smaller.
Good question - normally I would say "give it a go" but in this case I think the wise words "If it can go wrong, it will be worse than you imagined" might apply
All the typos are mine! I always spot them when I've finished uploading!
Can l add a 4.8 kw pylon batteries to 2.4 kw
Assuming you are talking about the US5000 and adding it as the master on a group of US2000, 2000B or 2000C then the answer would be yes. The batteries will be fine, but the inverter might not have new enough firmware to specifically recognise it is a US5000 and might just treat it like a 2000 - but that would not limit the capacity. In many ways it is just a us2000C with a lot of extra capacity. If in doubt see if either pylontech or your inverter manufacturer can confirm the battery will work with your inverter.
Thank you got your reply most helpful
Adapters available on ebay. www.ebay.co.uk/itm/234982424825 . If there are other adapters like this needed (anyone need to go connect a 2000B to a "C" cable?) then let me know and I'll see if I can do anything if there is sufficient demand.
Odysee Follower 45 @Super-Grand-Ad:f - Hi - You are measuring Volts across the resisters not Amps - 81650 batteries are 4v2 when fully charged and 1200 Ah to 4000 Ah so to balance 18650s they also need to be matching Ah as well as matched charge ether in series or parallel configuration.
@@uksuperrascal since they are 1 ohm resistors the voltage across them is the same as the current through them. I am using resistors to ensure equal impact on both sides
@@uksuperrascal they don't really need to be balanced ah if the bms treats them independently but if just joined in parallel then they will keep self balancing in an uncontrolled manner as they drift out of sync, but for example with proper management you can put the us2000 and us3000 in parallel despite them having different ah
@@MakeOrRepair It was just that you did not explain that, you just jumped to calling it amps which may have confused people because your DMM was set to Volts.
Odysee Follower 45 @Super-Grand-Ad:f - Hi - You are measuring Volts across the resisters not Amps - 81650 batteries are 4v2 when fully charged and 1200 Ah to 4000 Ah so to balance 18650s they also need to be matching Ah as well as matched charge ether in series or parallel configuration.
Pretty sure I answered this one, but seems to have appeared again because it is edited
@@MakeOrRepair Yes you did reply Not sure whats happening with YT