GXMnow
Solar Wizard
- Joined
- Jul 17, 2020
- Messages
- 2,709
Here is the page from Ali Express
Several vendors carry the same boards. This one had fairly quick free delivery. They were also very responsive to messages.
The casing has changed and the caps are now enclosed in the cast housing. They did not have the 200 amp in stock and it had to be built, so it took over 2 weeks before it shipped. Once it did ship, I had it in 4 days.
The setup is quite easy, but there are two things that had me confused at first. Once I got it all connected, it would not turn on and just sat there. It turns out you need to supply a charging current that will push about 5 volts higher than the battery voltage. My test pack was near full charge and so the difference with a CC/CV charger was only 1 volt. I had to use a separate power supply to get it to wake up. The next thing I figured out was that once you make a setup change, like the number of cells, you have to do a full shut down and power it up again with the over 5 volt kick again. Once it is in my solar bank, this should not be a problem, but it was a bit confusing with the poor instructions. The 200 amp version has 2 amps of balance current. It is a true active energy balance system. On the app, you can watch it pull 2 amps from the cell with the highest voltage, and then push 2 amps into the cell with the lowest voltage. The two large caps are actually 35 farad super caps to hold the energy it is moving. My pack was already pretty close to balanced, so it only cycled for about an hour and now all 14 cell groups are within 0.003 volts so the balancing section is basically shut down. If any cell goes more than 0.005 out of balance it will start up again. You can also set the balance threshold as well as reduce the balance current if 2 amps is too much.
The one concern I do have is the cables are just two #7 AWG. That seems a bit light for a 200 amp rating. The charge current from the Schneider XW can hit 140 amps, and at full constant load, it could draw 140 amps, and surge to well over 200. I do not plan to run it that hard, but I don't want 4 inches of wire to be the limiter.
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www.aliexpress.com
Several vendors carry the same boards. This one had fairly quick free delivery. They were also very responsive to messages.
The casing has changed and the caps are now enclosed in the cast housing. They did not have the 200 amp in stock and it had to be built, so it took over 2 weeks before it shipped. Once it did ship, I had it in 4 days.
The setup is quite easy, but there are two things that had me confused at first. Once I got it all connected, it would not turn on and just sat there. It turns out you need to supply a charging current that will push about 5 volts higher than the battery voltage. My test pack was near full charge and so the difference with a CC/CV charger was only 1 volt. I had to use a separate power supply to get it to wake up. The next thing I figured out was that once you make a setup change, like the number of cells, you have to do a full shut down and power it up again with the over 5 volt kick again. Once it is in my solar bank, this should not be a problem, but it was a bit confusing with the poor instructions. The 200 amp version has 2 amps of balance current. It is a true active energy balance system. On the app, you can watch it pull 2 amps from the cell with the highest voltage, and then push 2 amps into the cell with the lowest voltage. The two large caps are actually 35 farad super caps to hold the energy it is moving. My pack was already pretty close to balanced, so it only cycled for about an hour and now all 14 cell groups are within 0.003 volts so the balancing section is basically shut down. If any cell goes more than 0.005 out of balance it will start up again. You can also set the balance threshold as well as reduce the balance current if 2 amps is too much.
The one concern I do have is the cables are just two #7 AWG. That seems a bit light for a 200 amp rating. The charge current from the Schneider XW can hit 140 amps, and at full constant load, it could draw 140 amps, and surge to well over 200. I do not plan to run it that hard, but I don't want 4 inches of wire to be the limiter.