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I am looking at putting a Low Voltage Disconnect between my battery BMS and Giandel Inverter, as I don’t trust the Inverter’s LVD. 24v system, needs to be a 200A - 300A LVD and I would like to be able to adjust it. Any suggestions?

Thank you for this info. I just got a Morningstar Tristar.

I tried supplying 12v and then 24v DC but each time I switch the switch over to external power the BMS completely shuts down like it has no power.

Battery

Here is the screen shot

So my BMS seems to be tripping off because of cell voltage difference again… it is exceeding 300mv

Are Samsung EV Lithium Ion 12s 44.4v a good options for building a 48v small off grid system? I am thinking of using maybe 6 or 8 in parallel for a cabin. Or are LFP still better?

I’m looking for a breaker for 120v AC to use after my 4,000w (6,000w surge) Giandel Inverter. It will go between my inverter and main breaker panel. My inverter is about 40’ from my main panel. What do you all use for this situation

Any updates on this issue? I'm getting the same error with my Giandel (silver) 24v

That's it! Thanks so much. It was at 250a I set it to 300a

My Chargery 300 BMS is shutting off the batteries occasionally when I use my miter saw… no fuses are being switched, it just disconnects and I have to reboot the BMS, then it works again. 24v system, LFP 280a, 16 cells 2p8s configuration

Okay, good to know. For connecting multiple MPPTs to a LFP Battery build, do the SCCs need to be able to connect and communicate to each other as some people seem to imply?

I'm planning to purchase 2x 60a SCCs does the brand matter? Cheapest here is Renogy, and Epever, then Outback and Victron. Which would you guys recommend?

Interesting. So will the damage be apparent? I connected my 40A Renogy Rover SCC to my panels without the batteries briefly, could that be why it doesn't disconnect on high Voltage?

Mhmm, the manual says you can use the apl or User mode. I've contacted Renogy and waiting for advice. About ready to buy a different SCC.

Mhmm, here's the pictures. When I check back on it, everything looks like it saved. These are the adjustable settings on the SCC.

Yeah, sorry, I forgot all about it.

Yeah, it turns out the switch for this does fit 8AWG wire, so I'm looking for another switch option.

Thanks, yes, I've been using the "user" mode as described

It is below that minimum size. 8AWG Not connecting to utility, only offgrid however I would also like to connect it to a generator so I should probably be using a switch before the panel. Inverter is not split phase. For the time I'm just running it into one of the panels 30a breakers, and back...

3.651 for the high and 3.581 for the low cell

Same problem again today. Here's what I have set the SCC Renogy at today. Boost 13.4v (26.8) Float 13.2v (26.4) But when the sun had been out for serveral hours the SCC finally reached about 29v on its battery reading. (Due to an error in the SCCs battery v reading actually battery voltage...

Do I need to put a breaker inline between my Giandel 4,000w inverter and my AC service breaker panel in the house? Or does the Inverter already have one internally? (Offgrid) Inverter will be supplying the AC panel in the house, and I'd like to run it thru the top of the 200A panel. (I...

I'm working on the SOC calibration as directed in the chargery manual. What should I use as a cell voltage figure when calculating the WH and AH of my LFP batteries. 3.65v or less. i.e. what is the recommended top state of charge for the cells?

I'm thinking your right! Noticed the image attached above of the chargery BMS was just after the alarm and shut down, the cell difference was 37mv and the diff of cell voltage was set to 30 in the BMS so it maybe shut down because of the cell diff? I have adjusted the cell diff to 55mv now

Okay, here's what the cells read

I noticed that the Renogy SCC is reading the battery at about 0.5 volts lower than the SCC so I am adjusting the boost (calibrating the SCC an additional bit lower from 13.8 to 13.2). I'll see how it goes when the sun comes out again.

I've got boost set to 13.8 (×2=27.6v) and it's still not disconnecting before the BMS... maybe I should lower the boost some more?

Okay, I will try lowering the boost... Yes, double the numbers for 24v systems. 14.4v x 2 comes out to 28.8 which I think is too high or really close to too high. The max the battery could reach I believe would be 29.2v (3.65vx8) for LFP batteries.

I set it to "Li" since I'm using LFP batteries.

Hi, I am using Renogy Rover 40A MPPT. However this SCC is not disconnecting when the LFP batteries reach high voltage.The BMS keeps shutting down due to high voltage however I would like the SCC to shut off before the voltage reaches BMS HVD. (Using 2p8s 24v Chargery BMS8T-300 BMS,) I set...

Thanks @robby I am curious about what that would look like in either situation, 2 generators or an inverter (or 2 x 110v inverters?) But first the generator, someone said I can get a second 2000w Honda generator and connect both of them.... It seems to me that there would have to be a way of...

Is there a way to take two 110v lines and make one of them 180°out of phase to make 220v split phase?