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I started at 55.11V 100mA and I would come back in and check on it and it was 0mA, charge MOSFET open. Turned down to 25mA and reset over night. This morning I put it on 50mA. Differential 217mV My previous method as a human BMS worked great but takes way to much effort. I was hoping that...

Good watch about how the grid works and what happened when a CME take it out

Make a square little room with poured concrete walls with a roof that could blow off just like they use to store explosives or fireworks. The blasts and fire goes straight up.

Also doing it with small power supply. ChargVerter excellent for large current. Small one that can do small constant current will do it but take a long time. The top set voltage of 56.2 @ 25mA, it will slowly walk up as it balanced. This was suggested by GXMnow. I already tried this with...

Styrofoam at the first signs of heat. They shrink right up and dump the load

I can tell you some issues I have with the EG4 LifePower4 (QT-YS00-16SV100A) Narada BMS so take some of these suggestions as ways to make a better one >Only 6 balances going on at any time, maximum shunting current is ~300mA or 10-12 ohms. I like the idea of 2A shunting current and why not all...

I am adding one to every battery, Great idea.

I really wanted to understand how this BMS works in the QT-YS00-16SV100A rack battery. There are so many threads and people having issues. It shouldn't be that difficult to tweak the current firmware to get it to work better. The SOC 100% that was sitting at 54.0V all night. Then put on...

I just found out about this. Any US Distributors?

I love it! It would be an upgrade to my current system. There still may be smoke.... I'll have to have 2 systems so when one goes down the other one is secure.

Ok, the real question of "What If" SHTF at your house due to your RESS, Residential Energy Storage System? There is a bunch of smart people here that love what they are doing. I personally have temp, smoke, and remote monitoring, however when it tells me something is wrong now what? The...

Many choices in the marine world that are powered off 12VDC with relay output.

I wanted to try this idea. Home automation system that looks at temperature & smoke detector that triggers a remote robotic finger to turn off the breaker. I have the smoke and other sensors and waiting for my new finger ;) FYI, fire suppression that is in some commercial batteries. I am not...

This will be the next sensor go to into battery boxes. Hazardous Gas Monitor, with output to trigger a fan.

It doesn't seem to difficult to have a dryer vent set up with a marine bilge blower inline. It can switch on either by detecting something like gasses, temperature, or just run on a PWM and as needed. I was considering this due to hot South Florida heat but it would work both for ventilation...

I can tell you some issues I have with the EG4 LifePower4 (QT-YS00-16SV100A) Narada BMS >Only 6 balances going on at any time, maximum shunting current is ~300mA or 10-12 ohms. >It will stay balancing on a cell while another cell are at a much higher in voltage, software needs to jump around...

Still better than replacing all these AGM's every couple of years! I'll move off this thread and look for the Best BMS for my next home brew pack.

It's a little late for me but that thought had crossed my mind. I can work with this now. I know how I can correct the issue myself. The goal of this system is to provide power to my family during a storm event. With the solar it is "Backup with benefits". I'll swap this battery out...

I didn't make any changes to the parameters but that may be an option in the future after 10 cycles. I am open to any suggestions. I used 100mA to charge low cells to 3.53 and a 10W 8 ohm resistor to discharge ones in over voltage warning. It is now sitting at 56.3 (on Chargeverter) resting...

Issue will be resolved shortly

Right now at 70% they look good. They never make it to full charge. Somewhere in the 55V range they are 0.1-0.2 out of whack. Low cells never come up. I am going to isolate them and put them on a very low constant current with voltage peek of 56.2V and forget about them. Work week is coming...

The have had other issues at that school too: https://www.mv-voice.com/morgue/2004/2004_01_30.slater.shtml

They have the latest software in them. How is the dongle going to help besides make it easier to update next time? According to the SmartShunt the Charge set for 1 amp can still deliver up to 3 amps depending upon the voltage difference. Already tried walking them up a 0.1 volt at a time over...

This an a new one are so happy at lower voltages. 2 out of 6 are trouble makers.

At this point I don't see I have any other choice. The BMS will bring down the top cells but doesn't nothing to bring up the lower ones.

I have tried everything except open it up and charge the lowest cells up with an external power supply. The BMS will lower the highest cells but it does nothing for the couple that won't come up. Lower voltages it looks great.

So Very true

I am pretty handy with the computer and everything is up to date. Just ordered by updater with your promo code to make life simpler.

On charge/discharge cycle #5, closer each time.

Great Idea. I am having an issue with the Com Hub backlight flickering. They responded to the website inquiry and requested a video. I sent it to them and they are sending me a replacement hub. I asked for the updater so lets see what they say. No response about the battery issue. If it is...

I went down to 20% each battery. Slowly charging them up. Interesting watch:

Not a DIY but a close up of a thermal to turbine system. Due to PV panel prices this is going away. Cool experiment.