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I think it would be a rare for my part of NW Oklahoma to get down to -40C. Here the late fall winter, and early spring nearly always drop below the safe charging temps. The heat my batteries in are exposed to in the summer is nearing that mean old 113F. The depth of the shaft to accomplish a...

I have been working on something called a GAHT ground air heat transfer system. They tell me that six feet down the ground stays at a pretty constant 60 degrees, so I dug a circular trench to lay some thin-walled corrugated 4" poly pipe from the floor of my well house through the trench back to...

Hi you have asked an interesting question. It sounds like you are considering bypassing the SCC and going straight to the BMS thru the charge port on the BMS. I think the BMS could regulate small differences in the incoming charge, but as for my system the voltages would be too far out of range...

Me too.

I like the idea of the low temp I have a few questions. You are new to LiFePo4 batteries and so am I. So please excuse dumb questions. Your BMS C- terminal is connected to the to the neg of the SCC, and the P- terminal is connected to the neg side of your load maybe an inverter, and B-...

I was unable to set up the thermostat today, but I forgot to add that part of the plan was to supply power to the thermostat down stream from the battery fuse and down stream of the BMS ground. That is to say if the current is interrupted by a blown fuse, or a BMS interruption the lack of...

I cannot answer your question, but I am using a epever 60 amp SCC and in the installation instructions it is very clear that the battery must be connected before the panels. This instruction gave me the impression that if the panels remained connected after a BMS disconnected the battery the SCC...

I am going to try to set a thermostat to close a N/O relay at temperature when the temp is above 5 degrees C and when the cooling side reads under 4 degrees C it will allow the N/O to disconnect the relay. The relay will carry current from the solar panels to the SCC only when the temp is above...

I have been doing this for about four months now. I have been using 2- 295 watt panels my pump requires only 370 watts at 21 to 29 volts rated 24VDC. I needed to use a buck converter to use a level switch to shut down the pump if the water level went down to close to the pump. The converter...

I bought the 150A Daly BMS with separate port, and the description on the actual BMS says 80A charge current, 150A discharge current.

My BYDs are rated at 120C I bought a Daly separate port 150amp 8s LiFepo4 BMS for each of them. I hope that was proper, because it wasn't cheap.

That was my first plan, but then there was that switching idea that looked sooo good. I don't want to ruin my SCC switching from heating to batteries. So I am back to what you have just suggested, but it is nice to know I am not the only one with this idea. Thank you for sharing.

You sir are becoming a very helpful guide. I was hoping I could move the load from batteries to the load of a heat source until a thermostat told the relay to go back to batteries. Now you have me wondering if my SCC could handle the switches. I will be using an Epever 6415AN it has a temp...

I really like this idea. I was thinking I would disconnect the SCC from the batteries with a thermostatic controlled relay, but switching the power from batteries to heat would be less wasteful. Thank you for this post.

I have a water level switch 80' down and used the resistance for the 160' round trip to bring the voltage to a level that the switch could handle, but that was in addition to a resistor at the surface, still it was 24 AGW and 160'. The BMS leads are in inches not feet, but still why risk...

Thank you for your input. I have been thinking that there just isn't enough extra wire to worry about, so why not make all the leads the same length just in case it would have an effect.

I am worrying over 4p 8s BMS set up my self. That is to say 4 BYD 24v batteries in parallel. After I bought all this stuff I seen a video Will made, and he said I might be asking for trouble if I go over two or three 8S in parallel. I also will be using 4 separate port BMSs. If you find out any...

Hi April as I said I have a BMS for each of my BYD batteries. What I didn't say is all four are 150 amp BMSs with a separate charging port. I have watched a video of Will's in which he said if I try to parallel over two sets of batteries that I might be asking for trouble. So now I am wondering...

Ditto

4.5" is as big as I have ever seen and then only in pictures. I think the air bags might not help much when the hail is that large. Once in a small town to my east I seen where hail had pitted the asphalt roadway. I am happy to say I was not there when it happened. We have a twister go by once...

We have some pretty large hail on occasion here in NW Oklahoma. Any type of permanent guard over the panels would reduce their production. I have been thinking about some kind of air bag that could be deployed and retracted. I know I have goofy ideas sometimes. I have been told I spend most of...

Thank you sir. I believe I have part of a plan now.

Thank you sir I am a novice but with all I have learned from this forum, maybe I can avoid making the bad smoke. I know I ask a lot of beginner questions, so thank you for your help. Question if the NO relay were in a closed state for a long duration do you believe the return spring would be...

First let me thank you for your response. Now I think I have to apologize for being a little unclear. Please let me try to explain. My thinking is that the PV cable could go through a NO relay that is to say if there is power to the relay it is closed to let power from the PV panels enter the...

Question if a blown fuse could cause the loss of the SCC wouldn't it be better to reduce your losses to open the SCC input with a NO relay with the loss of the fuse? I understand the relay will cost me a few watts around the clock, but if the battery is required to open a switching relay it...

Question if the main battery fuse goes during solar panel's PMax will we lose our SCC?

Thank You April. I already have them coming, but I may have misunderstood something from another post, and was afraid I had over spent again. Thanks again for the info.

Question do I need 1 8sBMS for each of my 24v BYDs?

This advice may be a whole lot more useful than you might think.

I am a novice, and I only have one water well running on solar at present. I am working on another array with 1320 watts of panels, and I believe there will be times that my batteries will be charged to capacity. I will be using a MPPT controller that I already own, and have been thinking about...

I payed 405 each and 350 for shipping for any number of batteries. 2X405=810+350= 1160 for two delivered. Still beats 1368 a pair. I wish I had found your source when I was buying mine.

I can see how the resistance would increase with the length of wire, but the difference would be so small in length between all the cells it is hard for me to believe it would be enough to unbalance a large battery. This only my opinion. If in fact they need to be the same length that would be...

Thank You! There is a lot to digest, but good info is good.