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I'm trying to determine the sizing for my panels and I'm a bit confused. I'm 250w (x8), 2S4P. So the current top is 33.08a and the voltage is 75.02v. But on the LCD screen on my MPPT it says "PV" and "Batt" above that. And I've seen it as high as the mid 50s amperage. When I use my volt meter to...

I see that, and I appreciate your thoughts. I wonder if I could get your opinion on the size I should get. My panels are 8.27a, so 33.08 is my max, which of course I will never get, especially on my used panels. Since I am really just protecting the 10awg wire, would you say 30a was my ideal...

Thanks, man. Are dc breakers hard to come by, do you think it would be easiest to just get an inline fuse (I assume for the positive wire)? I see they have them reset-able now.

Can a standard breaker box and breaker be used as fuses for the 24vdc 10awg wires straight from the array? I have used 250w 24v panels 2S4P (2000w, 75.02v, 33.08a). 10awg wires are now going straight to the MPP A-I-O. Can a breaker be used or only dc fuse of some sort?

This?

Did you ever figure an amperage limit?

Well, my setup is a distance away from the homes it will be powering. So I'll have the inverter go to this 25a breaker and then from there it will travel about a hundred feet. That's what the 2-2-4is for. It will run into a breaker box on the home and be distributed with 14awg and 12awg into a...

Well, it really hasn't been resolved. @RCinFLA is correct, I am just connecting and testing the MPPs and everything else en route to my full system hookup. The LV2424s have been sitting waiting while I get the cells in, charge and top balance, find a BMS and learned to connect them. I've done...

No, today just an unplugged power cord and a small charger that was off. An off fan. It's odd, I thought that it would be a smaller load than the mains, too. But it's consistent.

Maybe. Seems out of the ordinary. My gut tells me there is a different dynamic of some sort and I have learned to pay attention to that dude.

Idk, but all there is is a chopped 12awg ext cord wired to the inverter's output and am plugging in typical grounded and ungrounded plugs into it...ext cord, led lights, phone or laptop charger...and they always noticably spark more than normal. It isn't a single spark either. If you're fiddling...

Anyone know why there is such a spark when you plug something into the ac output on the LV2424s? Happens every time. Is it avoidable?

So, I'm talking about the main breaker that I install right off the LV2414 AC out. When it gets to the home, I'll have a number of 15a breakers dedicated to maybe 4 outlets throughout the space. Into these 15a breakers will be low amperage/watt items such as 42w .35a or less fans, typical device...

Well, in my case, the only motors that would ever have to startup and run would be on a refrigerator, fans or a vacuum cleaner. Also, my wires transferring my AC electricity will be huge. So, are you saying that if I got to the point where I was pulling 21a to 25a with the LV2424, that something...

I'm not planning to do any AC input/charging... only solar. But what about AC output? Should my overkill 6awg wires leave the AC output connections on the LV2424 and go straight into a breaker box as a sort of cutoff? That's what I'm discerning, but what is the breaker size that should be used...

What amp gfi breaker did you use/choose?

Well, I didn't have the nominal and recommended, BUT I know way more about the how's and why's now, so I sure thank you for that info. I know more today than when I typed that response, however, I personally don't see the need in my own case to try and squeeze every drop out of these with such a...

I'm not using it, I just have to figure out how to replace a single cell affordably. I have lots of cells and time to get things right before they officially needed to perform. Thanks for all the input from everyone. Even the nayser. It's all useful in the learning process. I've learned a ton...

Lol. Yes, of course.

Yes series. This was a way to get the charge up to respectable levels before a switch to parallel for top balancing. To charge these 280aH cells in parallel at 5v would take a year.

Hah! Idk, depends on who has the worse plague and riots.

If you don't mind me asking, what was freight on just 2? I have a couple in the cart, but am waiting to hear if "Amy" responds to my inquiry first. Even better would be if anyone on the forum ordered some extras and wanted to sell a couple.

I think the idea is you push them to new heights, like if you max bench 225lbs, you always will unless you show yourself more. But these are batteries, not human bodies, and I don't think it applies. Others say they have no memory, too dumb. I tend to agree. They charge and last amazingly...

Charging up even cell by cell with that charger won't take a day, it'll take weeks...per cell. Not necessary. Start charging PV and start using nature's energy.

The issue is what happened this morning. Essentially the cells all arrived within .002v of each other. And then the PV charge almost instantly irons that out to .001 or nothing.

Yep, I tried to be that guy too. Lots of prep and learn time. Unfortunately, it takes a second to undo that. My advice, get your awesome new cells like I did, put them in parallel for a little while, connect them to your SCC and PV and enjoy. Don't geek out and complicate what can be a pretty...

There was no monitoring that could be done to change this. It charged and rested based on the recourses writeup on the forum...minus the BMS. It was at the same voltage as the rest 3.55v. The charger was turned on to charge to 29.2... 3 minutes later the damage was done. It's just a dumb and...

Nailed it dude. Wish we'd discussed this at 8am.

4.8v

Yes, you're right about that. I apologise, I didn't mean that it didn't matter ever, I meant that it didn't matter while that thing is off and can't be turned back on.

I don't have these anymore, I'm speaking from past experience. These figures didn't matter...they come with unalterable figures in the built-in BMS with the BYDs. That was set higher than my LV2424. When they dip below 22v, they shut down. In my experiences, I never saw them come back on until...

What's important? What could transpire?

It was all a few minute experience.

Pretty bad, not normal, but also not the worst I've seen pics of. Did someone from the forums series charge up instructions, preluding a parallel balance. This is what I got. The voltage on the battery main negative cell shot up to 4.(friggin)8, and the damage was done. I quickly got it under a...

Have you tried shutting off the breaker on the BYD and letting it sit (the voltage eaks up some)...then flipping it back on after a while? The BYD won't come back on (thus neither will the LV2424) unless at 22.4, in my experience. Sometimes it was minutes before the voltage would organically...