DIY battery to Growatt high voltage (MOD 8000TL3-XH) #30
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Morning. I found this great project yesterday and started to wonder a bit about how the integration between a battery and an inverter actually works. A bit of background. I have MOD 8000TL3-XH inverter but am reluctant to buy growatts battery as i recon 3000EUR (including swedish 50% grant) for 10kWh battery is quite expensive. Hence, I have been thinking about getting a victron system as I would be able to install 3 multiplus 3000 and 10kWh diy lifepo4 battery for the same amount (roughly). However, in the meantime, getting a diy battery integrated into the growatt inverter would be awesome. I get that you can get the comminication between a bms and the inverter, but how would you make sure that the voltage input is in the accepted range? As I understand, the ARK XH BMS block includes a dc-dc step up converter from ~48v to 400v. I would assume that this is still needed even if you managed to use your own 48v battery? Can we hack the ark xh bms block to accept e.g. a daly bms? That would be quite nice indeed. |
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Replies: 8 comments 2 replies
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Hi, it should be possible but you would need something hooked up after the BMSes which usually handle the 48V to step up the DC voltage to 400V. You'll need to research that :) |
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Hello everyone, |
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Hi guys, "new to the pool" .. So I have growatt SPH10000 . I am running 3 LV batteries in serial- each 10kWh .. Its enough to wake up SPH and DC circuit and discharge/charge almost at 4kW ((52Vx3)*25A). I am currently running Lead Battery settings for SPH but it would be nice to have BMS communication , problem here is that growatt has Low Voltage Cut for lead acid at 12V max .. that means If battery goes down to this level underprotection of battery pops up and BMS (on each battery) will shut the battery down. Each battery supports mulitple protocols including growatt LV CAN, but SPH 10000 is HV CAN. Can I be the test pilot for this one ? I use Pi4 with 64b os Goal here is (if its possible) sum all battery voltage + SOC and comm with SPH to be able to set SOC discharge and charge limits.
I mean it survive like 90% of all time, but when consumption is high durring night - battery goes to 0 - UVP(under voltage protection) you need to manualy power it up. mail me for more info - bee2twoo at gmail.com |
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Ok, let me grasp this:
I hope I got this right? |
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Hi Torsten, I have 3x lifepo powland these batteries has each LV BMS
I connect them in serie to achieve starting voltage of Growatt SPH10000
And yes I want to manupulate charging voltage (current is safe SPH is doing
max 25A) read soc and all necessary data for inverter to work with Lithium
preset.
At this point SPH is configured to lead batt, so no communication is going
on at the moment.
Batteries are connected to each other (i must check the protocol)
I can connect to(Master via DIP switch) battery via rs232 and I can see
each pack stats
Dňa pi 4. 10. 2024, 8:56 Torsten Oltmanns ***@***.***>
napísal(a):
… Ok, let me grasp this:
1. Do you have 12x12V lead acid batteries (144V) or 3 x 10Kwh LiFePo
batteries?
2. Those batteries (Lead acid or LiFePo?) are hooked up via BMSes from
POWLAND
3. You want to manipulate the BMS data; especially the maximum
charging/discharging voltage and SOC
4. And your Growatt SPH10000 is configured to lead acid battery
setting instead of Lithium setting?
I hope I got this right?
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Thanks for the quick reply. Do you have the CAN communication specification for the POWLAND BMSes? Or can you configure them which specification to use (e.g. Pylon, SMA, Growatt, etc.)? |
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So Powland has multiple protocols pylon, growatt lv, selpos rest i need to
check
I did check the growatt lv and values it seems correct
Dňa pi 4. 10. 2024, 9:23 Torsten Oltmanns ***@***.***>
napísal(a):
… Thanks for the quick reply. Do you have the CAN communication
specification for the POWLAND BMSes? Or can you configure them which
specification to use (e.g. Pylon, SMA, Growatt, etc.)?
To realize your project it is possible to use this application. Just need
to find out which dialect your BMS speaks 😄 or if I need to implement a
new POWLAND BMS binding.
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okay let me extend this little bit. Battery - POWLAND 10kWh I am able to test this program on all kind of products, FOX, SOFAR, Growatt, Huawei, Goodwe, Deye. I work in company that supervise all kind of photovoltic equipment, and I know a lot of people. |
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@romanbetwo FYI I just implemented the GOWATT_MODBUS inverter binding. |
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Sure, as soon as I get one of them in my hands I'll be able to test and let you know. |
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Hi, it should be possible but you would need something hooked up after the BMSes which usually handle the 48V to step up the DC voltage to 400V. You'll need to research that :)