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This will be a small stand alone system that I won't be adding any more panels to. I have four 300 watt panels. Due to the voltage limits of my MPPT controller, my only options are 2S2P or 4P. These are old panels. One of them produces about 16% less (40w) than the other three. I assume...

1. If you have a grid-tie inverter that has zero export capability, I assume it has to have a CT to manage the zero export, correct? 2. Do all of these zero export inverter have a way to set a threshold for when to stop generating? 3. If you can set it for let's say 300 watts (coming from the...

I have seen a lot of threads recently about heating batteries, etc. and it made me think of something I don't recall reading and had not really thought about before. What, if any effect does active balancing have on cells if below freezing? Even if the BMS has low temp CO, it won't cut off a...

So I picked up one of these based on some info in a different thread. So far I like it and it works at least as good as my Renogy Rover 40. However, there is one minor bur annoying issue that I wonder if anyone else with one of these sees. When I use the app and go to the Historical Data page...

I have a 12x6 cargo trailer conversion. It has powered roof vent and a side window. During the day when I am not using it, the powered roof vent runs when the internal temp reaches 95 degrees. Obviously it will never be cooler inside than the outside ambient temperature, but it is always 10-20...

I have a Renogy Rover CC. It has a temp sensor for lead batteries. Since the hardware is already present, would it not be fairly easy for them to allow that senor to be used as a low temp charge cutoff for lifepo4? They already have settings for HV and LV charge cutoff, so it seems like it...

So I have been on the wait list for well over 2 years. When I used to go to my account, it would give an estimate as to when it would be available. Then about a year ago, they decided to open things up to RVers (no more geolock) and offered "best effort" service. Ok, I get that, but on my...

I have a Renogy Rover 40 CC with 8 100W panels (4S2P) on my cargo trailer conversion. The panels are flat mounted, so obviously output is less than 800W most of the time. From the Rover, I have 4 feet of #6 cable. Note: The Rover manual states max size of #8 for the connectors, but #8 is only...

I have two identical non-smart 12V 100ah lifepo4 batteries. I had a couple of spare Daly BMSs with BT laying around so I swapped out the existing BMSs. One of the Daly BMSs is 100A and the other is 60A. I needed to do a test with a new inverter, so I put the two batteries in parallel with 2/0...

Do all BMSs have independent charge and discharge cutoffs? I ask because I had a "no-name" BMS that came with a complete battery that was cutting off early during charge (due to unbalanced cells) but appeared to be also cutting off the discharge circuit too (battery powers a router and I was...

So my friend and I each picked up one one of the Lachy 12V 100Ah LiFePO4 batteries from Amazon using a Vipon code that got it for $239 delivered. Seemed like a half way decent price. However, after capacity testing mine twice, it came out to just 74Ah and the other one only 91Ah. This in in...

I am pretty conservative with my FLAs and AGMs and have a discharge cutoff of 12.1V on both. I have four 140Ah AGM batteries that are about 6 years old. I just did a capacity test down to 12.1v and got 51Ah each on all four. Obviously that is not 50% of the 140Ah rating. Since they are somewhat...

I saw Will had a video where he looked at the Vestwoods 100Ah (mostly positive), but that one did not have Bluetooth, and I don't think is had low temp shutoff. This one apparently has both. I went ahead and ordered one since it was "only" $319 after the Amazon $30 off and seemed like a good...

So I have been playing around with a Daly 4S BMS. I am not understanding how it is calculating SOC. If I reset it to 100 after charging, it will drop to like 93% by the next day (no load) as the battery settles. Ok, that may be understandable. However, even if I reset it to 100% after 24 hours...

I think I figured out what most of the setting do in the app, but under parameter settings, what does the "zero drift curr calibration" button do? I don't want to press it until I know what it is for.

For simplicity, assume a 12V battery bank composed of 8 cells. Since some people have said that it is not ideal to have cells in parallel (for BMS monitoring), and that it is better to monitor cells individually, how do you do that with 8 cells. Is it possible with a single BMS?

I'm looking for a LiFePO4 battery that is the same physical size (or close) to a 7Ah gel cell. Of course one would think one would get higher capacity in the same physical size. I was looking at the one linked below from Amazon, but they seem to have bad reviews on the capacity. I do not want...

I am looking for a grid-tie inverter (no batteries) that has wireless current sensors. I remember reading a thread that had what I was looking for, but I can't find it now. I recall reading that it (the one in the thread) had a "fail safe" setting that if it could not read the sensors it would...

So I just got this meter and really like it so far except for one thing. When the battery is charging it display the amps flowing as a negative number and when discharging it shows it as a positive number. Before anyone asks, yes it is wired correctly and the charge/discharge indicator shows the...

I am looking for a new inverter. In needs to be pure sine wave, 12v, and 2000W-3000W (3000 preferably). Note; It must be 12v for my application. I know all about the current draw I would be looking at. I am mainly going this big just so that it will reliably start my AC that draws about 750-900...

So I have some Renolgy 100W panels that I have had in service for about 10 years. They are on the roof of my shed. These are set up as two panels in parallel (joined at the panels with Y connectors) in multiple "banks." The two lines from each bank come into the shed to a combiner, then to my...

By affordable, I mean around $100 or so. I don't understand why the displays on most of these are crap. I have this one https://www.amazon.com/gp/product/B081SXH9TK which works ok except for the annoying strobing of the back-light while charging and the display is not really that easy to read...

What are people using for bus bars that connect batteries/cells together? Are these just bar stock you are drilling holes in where needed? What material is the bar and where are you getting it?

New member here, but not new to solar power. let me give a brief description of what I have and what I need some suggestions on. This is a little long, so please bear with me. I live in rural TX and had a DYI grid-tie system for about 15 years. This is made up of 15 100w panels. I also have a...