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Great, thanks!

Based off of that it appears one lead goes to every busbar connecting each cell, not connected to either terminal, negative or positive, directly.

I'm wiring up 4 of these 48v 16s overkill bms, the diagram isn't consistent with any of the bms wiring videos I've seen on YouTube, including the one by Will Prowse wiring up the 8s version of this exact bms. The diagram clearly shows connecting the first lead to first cell negative, then the...

Max watts is 800.

Max volts for the controller is 150.

I thought of that too. That's why I cooled my panels off with cold water. After doing that the mppt said they were putting out almost 550 watts. My temp gun said they were under 80 degrees at that point. From my research panels typically operate at peak efficiency between 59 and 95 degrees. If...

If it's common and expected to get 50-75% of the rated power out of panels under optimal conditions then I'll quit trying to figure out whats going wrong and simply add more panels. That doesn't seem right to me though.

I've considered that possibility, and that's why I'm here asking about this. I don't expect 100% of the rated output, but 56% seems pretty far below the manufacturers rating. Even your system, theoretically 1200 watts, giving 900, thats still 75%. 75% of my 800 watt system would be 600 watts...

Maximum round trip circuit is 80'. But that's longer than it actually is. It's more likely closer to 60. I'm just estimating high because I can't get to my system to get exact measurements at the moment. Keep in mind that each 5.58 amp array is on it's own wire all the way to the mppt. So no 12...

I have flooded lead acid deep cycle batteries. It doesn't go to float until the batteries reach 14.5 volts. I don't think that's too quickly. Plus, that's definitely not the issue since it typically shows a solar output of 450 watts long before it goes into float mode. Even when the batteries...

I didn't properly explain how I have my panels wired. I have 8 panels. Manufacturers rating for each panel is; max power voltage =17.95 volts and max power current =5.58 amps. I have 4 panels wired in series, 71.8 volts and 5.58 amps, with their own 12 guage wire run all the way to the mppt...

According to the manufacturer the maximum power current is 5.58 amps. That shouldn't be excessive for 12 guage wire should it? Ill work on finding a wire calculator and get back to you.

I live in western oregon. Yes, 500 watt air conditioner run off of a renogy 1000 watt sine wave inverter. I can post some pics later. Anything specific I should be sure to get pics of that could be helpful?

Here is a typical reading from the mppt at mid day full sun. Each set of 4 panels is run through about 40' of 12 awg cable. The open circuit voltage and short circuit amp readings I gave were at the mppt end of the cables not straight out of the panels, so voltage drop shouldn't be the issue I...

Since I've already posted here I'll just go into my current issue which is my main reason for coming to this forum. If I'd be better off posting this issue in another area please just point me in the right direction. This summer I upgraded my solar system significantly. I purchased 8...

6 years ago I moved off grid when I purchased 26 acres without any power on it. I've been slowly building my solar system up as I can afford. Just hoping I can jump ahead of that learning curve a little bit if I can network with a few of you guys who have been there and done that already.