Sold out. !!!!!!New🔥$199 Kohler 24 volt catl batteries. Using for 48v system. 2.56 kWh 100 ah

[FETguy]

That's good question to begin with. The answer is no, the balance boards are powered by a HV to 24 VDC DC/DC converter in the BMS box, and without that they are unpowered. The balance IC is a Panasonic (now Nuvotron) AN49503A and study of the data sheet for that shows that it is entirely controlled by a host uC via SPI. Without SPI activity, it times out and goes to a low power state, which is why these batteries are in such good SOC after 3 years in storage. If we connect our own 24 VDC to the balance board it may come to life and start balancing; I have not tried that yet so don't know.

There is also an interesting daisy chain scheme by which the balance board in each module powers up the next lower board through a relay; I suspect this is orchestrated by the master board in the BMS box and is how the modules are assigned CAN IDs.

Will start posting my sketches shortly.

 

[FETguy]

Here are 3 of my sketches. Enjoy!

 

[FETguy]

The 4 pin Molex mini-Fit just picks up 24 VDC from the harness to power the "powerhub" (actually a Sierra Wireless FX30 gateway). I think the inverter must connect with the green Phoenix Contact plug. That has CAN on the green and blue wires. No RS485 which is a little surprising to me.
I don't have the inverter, so don't know - take a look at yours. I am not keen on running a GoodWe, so one of my goals is to find out whether this stuff would work with an SMA hybrid inverter.

 

[FETguy]

The 4 pin Molex mini-Fit just picks up 24 VDC from the harness to power the "powerhub" (actually a Sierra Wireless FX30 gateway). I think the inverter must connect with the green Phoenix Contact plug. That has CAN on the green and blue wires. No RS485 which is a little surprising to me.
I don't have the inverter, so don't know - take a look at yours. I am not keen on running a GoodWe, so one of my goals is to find out whether this stuff would work with an SMA hybrid inverter.

Now I see that the other two wires, red and black, are serial com (either RS232 or RS485) from the FX30S gateway - that must be how this system connects to the cloud, etc. It seems that the gateway connects only to the inverter via this green plug. And the inverter communicates with the Kohler battery by CAN.

Please confirm if your GoodWe has a place for the green plug.

 

[Supervstech]

How many more of these do you have left?

 

[codius]

Now I see that the other two wires, red and black, are serial com (either RS232 or RS485) from the FX30S gateway - that must be how this system connects to the cloud, etc. It seems that the gateway connects only to the inverter via this green plug. And the inverter communicates with the Kohler battery by CAN.

Please confirm if your GoodWe has a place for the green plug.

Yes the Goodwe has green plug its the RJ45 plug that goes into the main BMS. I can't find where the white plug goes its still a mystery.

 

[FETguy]

Yes the Goodwe has green plug its the RJ45 plug that goes into the main BMS. I can't find where the white plug goes its still a mystery.

The white plug goes to a mating connector on the wiring harness that connects the battery boxes and BMS box. It picks up 24 VDC to power the gateway and the light on the front of the cabinet.

 

[codius]

That's the black 6 pin connector not the white unless I have a wrong setup

 

[FETguy]

That's the black 6 pin connector not the white unless I have a wrong setup

Yes, the small black 6 pin connector plugs into the gateway. But the larger white 4 pin connector you asked about plugs into a mating connector coming out of the harness between the boxes and labeled "backup 24V". This is shown on page 68 of the Kohler installation manual. I got the manual with the big cabinet. I don't expect to use the cabinet, but it was the only way to get a cable set. I see now that the manual also shows the green plug at the inverter, just like your picture.

 

[codius]

Yes, the small black 6 pin connector plugs into the gateway. But the larger white 4 pin connector you asked about plugs into a mating connector coming out of the harness between the boxes and labeled "backup 24V". This is shown on page 68 of the Kohler installation manual. I got the manual with the big cabinet. I don't expect to use the cabinet, but it was the only way to get a cable set. I see now that the manual also shows the green plug at the inverter, just like your picture.

If you can show me on a picture I would be so grateful I'm so lost. And none of my cables are labeled.

 

[FETguy]

If you can show me on a picture I would be so grateful I'm so lost. And none of my cables are labeled.

Here is a picture. There is only one 4 pin white connector in the harness about halfway down the stack of boxes I think. There a couple of 6 pin Molex which are for expansion to the 15 and 20 kWh versions, but only one 4 pin. Its gotta be there.

This illustrates the frustration when these companies quit the business.

 

[codius]

Omg thank you I feel so much better I dont have the manual. much appreciated!

 

[devsoftech]

What's beyond me is the Kohler batteries do not charge beyond 26.62v in a 4 series configuration using this bricked Electriq Energy setup. If 26.62v is the max rather than 27.7V - 28V as per spec, then we cannot use 100% of the stored energy and the 4 batteries won't add upto 10kwh as promised. The charging (via GoodWe A-ES 7600 inverter) works for me with PV setup only (typically 2A-7A with 12 panels), and could never get on-grid charging. Since these inverters do not come with wifi dongles, I have bought two dongles by buying two MS inverters at 300-400 price points. The solargo app does not allow firmware updates and these inverters are horrible, they can't remember their last setting and always resets to General mode (I typically reconfigure as off-grid mode). GoodWe US tech support denies support for these whitelabelled inverters. The BMS firmware on GoodWe is stuck at version 2.0.2 and I had set it to OLOID - LBS battery that's a 48v X 2 series configuration. Is it worth reverse engineering the FX30 ? Also, on-grid battery charging is not working, should I try another inverter that's not Kohler/Electriq Power whitelabelled inverter, or should I hack my way converting grid to PV input (With efficiency loss though, besides I need to be off-grid most of the time), and can't beat the $650 price point of these whitelabelled inverters

 

[codius]

What's beyond me is the Kohler batteries do not charge beyond 26.62v in a 4 series configuration using this bricked Electriq Energy setup. If 26.62v is the max rather than 27.7V - 28V as per spec, then we cannot use 100% of the stored energy and the 4 batteries won't add upto 10kwh as promised. The charging (via GoodWe A-ES 7600 inverter) works for me with PV setup only (typically 2A-7A with 12 panels), and could never get on-grid charging. Since these inverters do not come with wifi dongles, I have bought two dongles by buying two MS inverters at 300-400 price points. The solargo app does not allow firmware updates and these inverters are horrible, they can't remember their last setting and always resets to General mode (I typically reconfigure as off-grid mode). GoodWe US tech support denies support for these whitelabelled inverters. The BMS firmware on GoodWe is stuck at version 2.0.2 and I had set it to OLOID - LBS battery that's a 48v X 2 series configuration. Is it worth reverse engineering the FX30 ? Also, on-grid battery charging is not working, should I try another inverter that's not Kohler/Electriq Power whitelabelled inverter, or should I hack my way converting grid to PV input (With efficiency loss though, besides I need to be off-grid most of the time), and can't beat the $650 price point of these whitelabelled inverters

It's hard to find wifi kit for the GW7600A-BP AND GW7600A-ES. I have the GW7600A-BP. So charging it with the apps seems to be OK? Have you tried the Sems+ app?

 

[wpns]

It's hard to find wifi kit for the GW7600A-BP AND GW7600A-ES. I have the GW7600A-BP. So charging it with the apps seems to be OK? Have you tried the Sems+ app?

Does the WiFi kit for GoodWe have any value? I've got a couple of their grid-tie inverters sitting in the 'unused' pile that might need to be parted out...

 

[codius]

Does the WiFi kit for GoodWe have any value? I've got a couple of their grid-tie inverters sitting in the 'unused' pile that might need to be parted out...

Yes it has value. the apps aren't that good. better to have the app then not. Can you send a picture of your inverters?

 

[devsoftech]

Does the WiFi kit for GoodWe have any value? I've got a couple of their grid-tie inverters sitting in the 'unused' pile that might need to be parted out...

SEMS Portal app requires WiFi dongle and allows you to configure your power plant and add the inverters. Some of the working modes are labelled differently (Time of use is called Eco Mode). It won't do anything for your charging except showing statistics.

 

[codius]

Does anyone have lan box 5pin or wifi 5pin I will pay top dollar.

 

[wpns]

Does anyone have lan box 5pin or wifi 5pin I will pay top dollar.

Sorry, mine are the snap-in with a piece to unlock them, not the bolt-on.

 

[JerryK]

I have breezed through this long thread and it appears much of a discussion is about configuring 48V with communication. My question is simple my needs would be 24V using a single battery at the most paralleling a couple of them without communication. I would have controlled charging keeping well below cell peak voltage to avoid overcharge issues sacrificing a little capacity.
Would these be a reasonable alternative to mass produced 24V options?

 

[jdive01]

I have breezed through this long thread and it appears much of a discussion is about configuring 48V with communication. My question is simple my needs would be 24V using a single battery at the most paralleling a couple of them without communication. I would have controlled charging keeping well below cell peak voltage to avoid overcharge issues sacrificing a little capacity.
Would these be a reasonable alternative to mass produced 24V options?

Same here. I just need 1 battery for a 24v system. Will it work and what do i have to set the charger at? (Growatt 3k)

 

[Supervstech]

Same here. I just need 1 battery for a 24v system. Will it work and what do i have to set the charger at? (Growatt 3k)

I asked a while back how many they have left, but there has been no response...
Maybe this for sale thread shouldnt have tons of tech support posts, just the for sale stuff?

I might start a new thread, and move all the tech stuff to it, with a link back to this thread?
@AnthonyS

 

[jdive01]

There are a bunch for sale on fb in Phx and Mesa

 

[Hedges]

I have breezed through this long thread and it appears much of a discussion is about configuring 48V with communication. My question is simple my needs would be 24V using a single battery at the most paralleling a couple of them without communication. I would have controlled charging keeping well below cell peak voltage to avoid overcharge issues sacrificing a little capacity.
Would these be a reasonable alternative to mass produced 24V options?

There is a balancer or modular BMS built in. We understand it needs to be connected to 24V to operate. Not sure if it will balance with just power applied, or if it needs CAN bus communications.

Even with it balancing, if you charge open-loop, you run the risk that a cell runs to over-voltage and nothing knows to disconnect. You might operate for years and one night it suddenly vents and possibly starts a fire.

Safest thing to do is splice a complete BMS into the balancing harness and route the high current power wires through it.

 

[JerryK]

There is a balancer or modular BMS built in. We understand it needs to be connected to 24V to operate. Not sure if it will balance with just power applied, or if it needs CAN bus communications.

Even with it balancing, if you charge open-loop, you run the risk that a cell runs to over-voltage and nothing knows to disconnect. You might operate for years and one night it suddenly vents and possibly starts a fire.

Safest thing to do is splice a complete BMS into the balancing harness and route the high current power wires through it.

That's where I was suggesting I would have controlled charging keeping well below cell peak to avoid any cell over-charge possibilities by accepting reduced capacity. But yes placing in a BMS of choice would be a safer method. Thank you for you reply