Need recommendation for AC coupled inverter for 48V batteries (Australia)

[Johnno3000]

I currently have an 8kW SolarEdge PV system. I will be upgrading the house to 3-phase and adding another 10kW SolarEdge system on a separate phase. I'm leaving that to the SolarEdge guy, but I want to also AC couple some batteries.

I recently acquired 12 x new Samsung SDI 48V, 4.84 kWh (58kWh total) rack mount batteries. They are leftover stock from a German company called Senec who recently stopped trading here in Australia. They were the battery modules inside Senec's V3 all-in-one battery box with built-in inverter. I paid about 10% of what Senec were selling them for. I found a manual for them online which contains the CAN Bus protocol and I have been able to read the data with an Arduino/ESP32, so I should be able to translate it to another more common battery like Pylontech or whatever to communicate with an inverter.

I've never done this before, so I'm looking for recommendations for an Inverter that is likely to work with these batteries (assuming I can handle the communication). Or anything else you think I need to be aware of. I'm in Australia, so may not have the same brands/models as other countries, but if you can at least tell me what sort of inverter I'll need will be helpful.

Cheers!

 

[toms]

Those are excellent batteries, if you change your mind you could always sell them to me

If I were you I’d contact Springers Solar in QLD. From a glance at the Samsung website they have a partnership with Sungrow for their hybrid systems. Springers sell Sungrow, and they are a switched on company - they will give you good advice.

Or sell the batteries to me.

 

[Johnno3000]

Here's some you can buy...

NSW: https://www.grays.com/sale/5056799/...ed-samsung-elpm482-00005-rechargeable-battery
QLD: https://www.grays.com/sale/7051959/...ed-samsung-elpm482-00005-rechargeable-battery
VIC: https://www.grays.com/sale/3029428/...ung-elpm482-00005-rechargeable-li-ion-battery
WA: https://www.grays.com/sale/9051634/...-samsung-elpm482-00005-rechargeable-batteries

 

[toms]

@Johnno3000 Have you opened one of these up to see the cell layout? I’m hoping to get hold of a dozen or so. My plan is to use a REC BMS on one of the units so it will communicate with my SMA. Hopefully not too much fiddling around to access the 14 cells for cell monitoring.

I have previously used Powerplus rack mount batteries as added capacity in a system monitored by the REC, but as these are LiNMC cells i can’t parallel it with my LiFePO4.

If the price is right it will motivate me to make it work

 

[toms]

If anyone is interested i have a 48page PDF instruction and installation manual for these units.

 

[kommando]

My plan is to use a REC BMS on one of the units so it will communicate with my SMA.

The latest JK PB series BMA will talk SMA to a Sunny Island.

DIY 280AH battery JK BMS JK-PB2A16S20P Canbus to SMA 5048

I built a DIY 16S battery using Fogstar supplied Envision 280AH Grade B cells Case was an self build XR-07 with JK-PB2A16S20P BMS and screen It is now built and is at 69% charge out of the box and all cells are at 3.29V +/- .01V. SMA SI 5048 EU is loaded with latest SI 6048 US firmware with...

diysolarforum.com

Currently at 90 days with no alarms and a happy SI5048, 55 of those days with 2 battery's with JK PB BMS's..

 

[jsawick]

I currently have an 8kW SolarEdge PV system. I will be upgrading the house to 3-phase and adding another 10kW SolarEdge system on a separate phase. I'm leaving that to the SolarEdge guy, but I want to also AC couple some batteries.

I recently acquired 12 x new Samsung SDI 48V, 4.84 kWh (58kWh total) rack mount batteries. They are leftover stock from a German company called Senec who recently stopped trading here in Australia. They were the battery modules inside Senec's V3 all-in-one battery box with built-in inverter. I paid about 10% of what Senec were selling them for. I found a manual for them online which contains the CAN Bus protocol and I have been able to read the data with an Arduino/ESP32, so I should be able to translate it to another more common battery like Pylontech or whatever to communicate with an inverter.

I've never done this before, so I'm looking for recommendations for an Inverter that is likely to work with these batteries (assuming I can handle the communication). Or anything else you think I need to be aware of. I'm in Australia, so may not have the same brands/models as other countries, but if you can at least tell me what sort of inverter I'll need will be helpful.

Cheers!
View attachment 227415

View attachment 227416

View attachment 227417

View attachment 227418

Hi, I am in the same boat, same batteries. I am considering a Deye 8kW single phase for it. Working on the comms between Samsung and Deye at present.

 

[SWiftsureEDA]

What do you need to do to connect this:

BMS JK PB-2A16S20P with 2 Amp Active Balancer https://lifepo4.com.au/shop/lifepo4...Qvod8t3gkpXXA4TNSOwtqXg-1722218441-0.0.1.1-5204​

With that:

Samsung ELPM482-00005 Rechargeable Li-ion Battery​

 

[SWiftsureEDA]

Hi, I am in the same boat, same batteries. I am considering a Deye 8kW single phase for it. Working on the comms between Samsung and Deye at present.

Any joy? What progress have you made?

 

[RSahan]

Whats the usual selling price (end of auction) for these on grays?

 

[SWiftsureEDA]

Whats the usual selling price (end of auction) for these on grays?

$250 - $350 + 20% commission

 

[jsawick]

Whats the usual selling price (end of auction) for these on grays?

It depends, it appears that they release a batch every 2 weeks, 5kwh for about 400-700 AUD, brand new in perfect working order

 

[RSahan]

It depends, it appears that they release a batch every 2 weeks, 5kwh for about 400-700 AUD, brand new in perfect working order

Thanks $700 might be bit too much considering the fire risk and trouble setting it up with the BMS.

 

[RSahan]

It depends, it appears that they release a batch every 2 weeks, 5kwh for about 400-700 AUD, brand new in perfect working order

I just bought 2 myself :-D

 

[gstinson]

I currently have an 8kW SolarEdge PV system. I will be upgrading the house to 3-phase and adding another 10kW SolarEdge system on a separate phase. I'm leaving that to the SolarEdge guy, but I want to also AC couple some batteries.

I recently acquired 12 x new Samsung SDI 48V, 4.84 kWh (58kWh total) rack mount batteries. They are leftover stock from a German company called Senec who recently stopped trading here in Australia. They were the battery modules inside Senec's V3 all-in-one battery box with built-in inverter. I paid about 10% of what Senec were selling them for. I found a manual for them online which contains the CAN Bus protocol and I have been able to read the data with an Arduino/ESP32, so I should be able to translate it to another more common battery like Pylontech or whatever to communicate with an inverter.

I've never done this before, so I'm looking for recommendations for an Inverter that is likely to work with these batteries (assuming I can handle the communication). Or anything else you think I need to be aware of. I'm in Australia, so may not have the same brands/models as other countries, but if you can at least tell me what sort of inverter I'll need will be helpful.

Cheers!
View attachment 227415

View attachment 227416

View attachment 227417

View attachment 227418

Hi mate have you got a list of parts you used to make your Arduino and the code

I currently have an 8kW SolarEdge PV system. I will be upgrading the house to 3-phase and adding another 10kW SolarEdge system on a separate phase. I'm leaving that to the SolarEdge guy, but I want to also AC couple some batteries.

I recently acquired 12 x new Samsung SDI 48V, 4.84 kWh (58kWh total) rack mount batteries. They are leftover stock from a German company called Senec who recently stopped trading here in Australia. They were the battery modules inside Senec's V3 all-in-one battery box with built-in inverter. I paid about 10% of what Senec were selling them for. I found a manual for them online which contains the CAN Bus protocol and I have been able to read the data with an Arduino/ESP32, so I should be able to translate it to another more common battery like Pylontech or whatever to communicate with an inverter.

I've never done this before, so I'm looking for recommendations for an Inverter that is likely to work with these batteries (assuming I can handle the communication). Or anything else you think I need to be aware of. I'm in Australia, so may not have the same brands/models as other countries, but if you can at least tell me what sort of inverter I'll need will be helpful.

Cheers!
View attachment 227415

View attachment 227416

View attachment 227417

View attachment 227418

 

[gstinson]

Hi mate
Have you had any luck getting the batteries to communicate with an inverter

 

[<-&->]

Hi people , very basic question here , apart from the RJ45 CAN-Bus ports there are two sets of power connections.

The outermost terminals are marked B + and minus and the inner terminals have the black and red flip up cover over them.

Can someone confirm if the outer terminals are what you connect to your 48 VDC - 240 VAC inverter while the innermost terminals being connected to your charge source such as a solar MPPT charge controller ?

I am making this assumption based on BMS likely to be balancing the charge inputs from the charge source (solar MPPT or Mains)

straight out of the box a voltmeter on both sets of terminals gives 48 V at the outermost terminals and 3 - 0 VDC on the innermost ones.

I understand DIP Sw 7 enables the module unless you have an active CANBus device for independent control.

Has anyone cracked the holy grail of a really simple compatible CANBUS monitoring and control device for Hybrid Inverters ?

I have Victron Smart Solar MPPT and probably will use also Victron 48 / 5000 inverter units.

Big thankyou to Senec for providing such a blessing of all these affordable entries to offgrid

 

[<-&->]

I am connecting these ELPM482-0005 to a Victron SmartSolar MPPT which has user definable options for Float / Equalisation / Absorption voltages however the SDI manual refers only to Nominal Voltage of 51.52 v and maximum voltage of 58.10 volts.
What should the ideal voltage settings be for Float / Absorption / Equalisation ?

Should Equalisation be used at all or disabled ?

If the Samsung spec states 58.10 as maximum voltage , Can the Absorption phase be set a little lower to get longer life from the battery ?

Any suggestions on ideal settings in the Victron MPPT units ?

 

[KGBkgbkgb]

What do you need to do to connect this:

BMS JK PB-2A16S20P with 2 Amp Active Balancer https://lifepo4.com.au/shop/lifepo4...Qvod8t3gkpXXA4TNSOwtqXg-1722218441-0.0.1.1-5204​

View attachment 232160 With that:

Samsung ELPM482-00005 Rechargeable Li-ion Battery​

View attachment 232161

Has anyone come up with a simple and safe way to use these batteries?

What do you need to do to connect this:

BMS JK PB-2A16S20P with 2 Amp Active Balancer https://lifepo4.com.au/shop/lifepo4...Qvod8t3gkpXXA4TNSOwtqXg-1722218441-0.0.1.1-5204​

View attachment 232160 With that:

Samsung ELPM482-00005 Rechargeable Li-ion Battery​

View attachment 232161

I am connecting these ELPM482-0005 to a Victron SmartSolar MPPT which has user definable options for Float / Equalisation / Absorption voltages however the SDI manual refers only to Nominal Voltage of 51.52 v and maximum voltage of 58.10 volts. What should the ideal voltage settings be for Float / Absorption / Equalisation ? Should Equalisation be used at all or disabled ? If the Samsung spec states 58.10 as maximum voltage , Can the Absorption phase be set a little lower to get longer life from the battery ? Any suggestions on ideal settings in the Victron MPPT units ?

 

[<-&->]

Has anyone come up with a simple and safe way to use these batteries?

Hi KGB , Thanks for a reply , but why would i use that BMS in your reply when the battery has its own built in BMS ?
If i connect more than two of these in parrallel then the CAT 6 network cable connects each battery in CAN-out < > CAN-In between each module to get balance between each module.

The missing element is the CANBus device to connect to the inverter of choice so the inverter load / recharge functions are maintained within the OEM specs for these modules.

 

[kommando]

but why would i use that BMS in your reply when the battery has its own built in BMS ?

The JK PB BMS has various Inverter Canbus and RS485 comms protocols built into it which if your inverter is included means you do not need to come up with a solution for the fitted BMS to enable closed loop comms. The JK PB BMS also does parallel comms for up to 15 batteries.

 

[Boris_91]

I currently have an 8kW SolarEdge PV system. I will be upgrading the house to 3-phase and adding another 10kW SolarEdge system on a separate phase. I'm leaving that to the SolarEdge guy, but I want to also AC couple some batteries.

I recently acquired 12 x new Samsung SDI 48V, 4.84 kWh (58kWh total) rack mount batteries. They are leftover stock from a German company called Senec who recently stopped trading here in Australia. They were the battery modules inside Senec's V3 all-in-one battery box with built-in inverter. I paid about 10% of what Senec were selling them for. I found a manual for them online which contains the CAN Bus protocol and I have been able to read the data with an Arduino/ESP32, so I should be able to translate it to another more common battery like Pylontech or whatever to communicate with an inverter.

I've never done this before, so I'm looking for recommendations for an Inverter that is likely to work with these batteries (assuming I can handle the communication). Or anything else you think I need to be aware of. I'm in Australia, so may not have the same brands/models as other countries, but if you can at least tell me what sort of inverter I'll need will be helpful.

Cheers!
View attachment 227415

View attachment 227416

View attachment 227417

View attachment 227418

Hi. I'm also interested in the batteries and am wondering if you have tested to see if the internal BMS will protect the batteries stand-alone without a data connection to an inverter? Quite a few off grid inverters have programable top and bottom charge voltages so if the inverter can connect to the + - terminals and the BMS will protect the batteries as is, we wouldn't necessarily need to convert the CAN Bus protcol.

 

[<-&->]

What aspects of control would you program in to the CANBUS module ?

Is it as simple as turning off the inverter load if the battery bank approaches 44.8 volt minimum ?

If you have multiple battery modules in parallel you would presumably limit the drain rate to 31 A x number of modules less a safety margin.

What other data would the battery CANBUS need to be given ?

If the MPPT is a separate unit then the maximum charge rates need to controlled too unless your solar inputs and MPPT maximum are well below the C-rate ?

 

[RSahan]

Imo CANBUS for Low voltage batteries are just a gimmick. Even lfp batteries with pretty much flat voltage curve works perfectly fine without comms. You dont need comms at all for lithium ion batteries like these

 

[Boris_91]

I am connecting these ELPM482-0005 to a Victron SmartSolar MPPT which has user definable options for Float / Equalisation / Absorption voltages however the SDI manual refers only to Nominal Voltage of 51.52 v and maximum voltage of 58.10 volts.
What should the ideal voltage settings be for Float / Absorption / Equalisation ?

Should Equalisation be used at all or disabled ?

If the Samsung spec states 58.10 as maximum voltage , Can the Absorption phase be set a little lower to get longer life from the battery ?

Any suggestions on ideal settings in the Victron MPPT units ?

Hi. Absorb and equalize are really for lead acid batteries. You shouldn't apply equalize to lithium ion batteries like these. Most MPPT controllers will require you have some time on absorption but keep this as short as the controller allows.
These are labelled as 14S lithium ion. If charging to 4V per cell for longevity = Float of 56V. Play around with the absorption voltage unit they float at 56V. Something like 56.5V is a good place to start.