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I think I'm out just based on the weight alone. I don't have the ability to move around a 650 pound battery much less get it out of the car.

That is a crazy price drop compared to when I build my system 2 years ago.

Yeah I should've included that in my original post. 48 cells! That's insane lol

I can probably get the whole car for $400-500

Long time no talk, which is a good thing because my solar has been running flawlessly. However I have the opportunity to purchase a 2015 Nissan leaf EV for next to nothing. There are almost zero details on the vehicle other than it seems to be in very good condition. It is a police impound...

Basically turned off all my gadgets for about 4 days, minus my work laptop. They came around after a few days. I had the voltages but I don't think then had the "torque" behind them to go the distance. Back to standard operating procedure. This thread definitely highlighted some things I need...

Do you think the BMS itself would cause a parasitic drain during storage?

Ah, I see what you mean. The daylight hours are only getting shorter and shorter. One thing I've always wondered is how low is too low? I don't want to push the boundaries but it would be nice to know when I need to shit my pants.

Yes, It was a little cloudy about half the days and sunny the rest. I could be overreacting a bit, I've been known to do that. Maybe subconsciously I just wanted to buy new toys. I'll cut down my power usage over the next few days and see what happens. Unplugged the fridge just now, looks like...

Oh yeah forgot to mention they are 280ah cells.

I wasn't worried about the panels, but the batteries. I know the BMS has built in protection but I preferred not to risk it. 3 months or so I just had it parked without touching it. The other 3 months I had the panels disconnected but that's it, no other changes. Doesn't get very warm where I...

20a seems to be about average compared to last year. I believe the max output of the panels output about 29.9a total at peak output (combined). 3x 315w panels in series. Charge controller is the 40a mppt controller, 4215nb iirc. I actually didn't redo any wiring between last year am now, which...

I live in my bus half the year, other half is in a regular house. I run a 24v system with epever mppt charge controller, 900w in panels, current connected bms. 8x eve 3.2 v cells. I stay in southern California during the winter so sunshine generally isn't a problem. Last year I was able to run...

In getting ready to tear into the interior of my bus to redo it. This requires basically everything on the inside being stripped. I have 8 lifepo4 cells with an overkill bms. The batteries will need to be disconnected for a month or two. What's the best way to store them? Bms still connected...

Nevermind. I hate the Android version of this app. Switch function did the trick.

Ok I'm with you on all of this. Where I'm currently stuck is the BMS. for the life of me I can't figure out how to put it on discharge mode.

Also after reviewing some designs I may have made a mistake with my current setup. My inverter is hooked directly to my main positive & negative, other designs have the inverter ground hooked up between the BMS ground and the charge controller. Thoughts?

#1 Installing epever 4215n. Long story short I fried my old controller due to a residual charge in the panels. It's a very cloudy day today and it's still showing 110v from my panels. When the sun sets should the voltages level off so I can install? If not what's a safe way to clear that charge...

Thanks for all the help. Went out to the far side of town again to run the generator. Followed the event log to chase the loose connections in real time. Got it charging now without any clipping. I'm waiting to install the new nuts etc until I get my new charge controller on Monday. Then maybe...

That makes a lot of sense.

I do half lock washers on there currently. They don't seem to be doing the job. It's probably my fault... I am terrified of tightening these too much and stripping the threads.

Yeah they definitely aren't getting that high lol makes a lot of sense. Appears I have some loose nuts caused by the road vibrations.

Ah that does make sense. I drove 2200 miles over 3 days with these in the back. I've been very ginger with the bolts as threaded aluminum scares me. I've had some issues with them vibrating loose.

It is a current connected BMS and I'm told it's similar to an overkill BMS. I believe I enabled charge protection but I'm not sure. That period is pretty foggy. I included some screen shots just so we can be on the same page about it. Does anything stand out to you?

The BMS is flipping into charge protection and cutting the current to the batteries. It's doing this like every ten seconds.

I have been charging my 24v system 8 cell system via a generator as my charge controller went out. I have a power supply plugged into the generator and the power supply ground lead hooked into where the BMS ground would go into the charge controller. Positive going to the main positive on the...

Perfect. Scooped that up just now. Won't have it until Monday but that's fine. I probably have enough power here to work until then (just a laptop and monitor for work). I'll probably make my way out of town to top it up this weekend with the generator. I don't particularly like using the...

Yeah that's around what I gathered. I messaged the seller to verify the amps at 9ish each. Getting 113 at full sun when I tested them. Now I just need to source a charge controller. I'm a bit hung up on this part as the 150v controllers appear a bit pricey. Tempted to drop down to two panels...

So a little more info. Charge controller is rated for 40a in and 150v in unless I'm reading the spec sheet wrong. The batteries were hooked up to the controller as well. Bottom line is my model.

So I was on the road and exhausted. Like 10 hours of sleep over a week. Wasn't paying attention for a few minutes and I think I made a couple of errors. It's possible the controller was bad but I'm not sure. I have 3 "SSX-315M-BLK-120-NEW Q-Cells 315W Solar Panels, Black" panels. The charge...

I got it figured out. The BMS was fine. The charge controller was set for a 12v system. The triron series is an absolute pain to get connected to the PC. Once I finally got it setup everything started charging and reading correctly. Now I just have to get it in the bus and hooked up to the panels.

This didn't work. I went from having 26.5 v to 1.5v

Ah I see. I had a hard time finding the exact setup. The overkill had three. So one to the main negative and one on the c side of the charger right.

Current setup just for testing. I have two balance leads from the main ground to the BMS then on the opposite side I have two leads going to the charge controller. I'm thinking it's likely that I can't change the max voltage on the charge controller yet. Annoying that the triron controller can...

I have my BMS all setup and ready to go. It's 8s 24v diy pack with the standard 280ah cells. I have been testing it inside before installing it in my bus. I just get around to putting on the charge controller. Imagine my surprise when the charge only read 14/15v? I have 30v going into the charge...