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I'm going to give some general info first before addressing your situation. Whenever you put together a control circuit test it before leaving it unattended. For BMS systems set the max/min charge voltages down above/below the current voltage and verify that circuit is operating. Use a heat...

The buck converter that I linked is 18-35 volts input so that and attention to output current equals smouldering avoided.

Dragon Boat Festival, this year Jun. 25 - 27, also called Duanwu Festival, is one of the four grandest traditional festivals in China, falling on 5th day of the 5th month in Chinese lunar calendar. The other three are Chinese New Year, Mid-Autumn Festival and Qingming Festival.

I don't know if this is specifically relevant but... I operated hosting companies for 20 years, thousands of flat rate accounts, and some customers were so burdensome on my time (far beyond just unprofitable as an individual account) that I had no choice but to ignore them. I wanted to be...

You don't need a four port version. For two contactors run 12v+ through NO1/COM1 and NO2/COM2 separately to each coil+.

Sealed is fine and 150AH if the batteries are in series for 24 volt or 300 AH if the system is 12 volts. If your panels are over-producing or for "vacation mode" you can also use GEL which skips the equalize stage.

There's a Rev 2 diagram here. https://diysolarforum.com/threads/source-for-relays-for-bms8t.5749/page-5#post-84570

The relay controller setup I posted applies to the Chargery BMS. You may not need any relays or driver boards with a different BMS.

Yes. You will need a 48/12 stepdown and one or two relays and one relay module per BMS. You can make four 24 volt batteries with BMS8T and go series/parallel or you can make two 48 volt batteries with BMS16T and parallel them. The relay drivers are 12 volts on both BMS8T and BMS16T. The relay...

I did not look at those for my house but I can definitely see the appeal of an all-in-one for a van conversions. 60 amps of 24 volt solar charging is enough to run a 3000w inverter at half-power or about 500 watts continuous so it's not a lot of charging for a 3000 watt inverter. You're right...

I have an automatic transfer switch. The manual transfer switch is what I use to manage individual circuits. My autotransfer switches between grid/solar/generator. Since I normally get all my power from solar my autotransfer switches to grid if the batteries get low or to generator if the grid...

I use this at the breaker panel. Easy install and I reckon more easily removed. http://www.amazon.com/gp/product/B00TSJPQEO

Yes. To be honest I went to Amazon, typed in cable crimper, then sorted High - Low. I use a $20 Temco and a BFH. A good multipoint crimper is going to be expensive. A single point crimper is going to vary in price depending on how much you want to spend to do the same job as every other...

A cell that did that in an hour while the other cells stayed in the 3.3v range was either very defective or (dare I say) connected backwards.

Here you go. https://www.amazon.com/Ridgid-46828-Electrical-4-Pin-Dieless/dp/B00QGXDXOA

Rev2 diagram re: https://diysolarforum.com/threads/source-for-relays-for-bms8t.5749/page-5#post-81658

If you have a BMS8T it needs 24 volts. Are you waiting for batteries from China?

I don't see any wiring errors but your power sources are not shown. There are two red leds and one green led (near IN2) on the module. If the green led is not lit then the module does not have power. Check your grounding. You should have zero volts between DC- and COIL-. If you have the Chargery...

What are the steps you took to double check and what were your observations and measurements?

If this does what I think it does (not entirely sure) you could remove the relays on this board and run yours instead. What I think it does is convert high trigger to the pulses needed for the latching relays that are on the module...

So far the best combination I've found for a Chargery relay setup is these two gismos. Everything you need to run one contactor for common port (by wiring the relay controller NO contacts in series to one relay) or two contactors. Plus you get an extra controller for cooling fans or whatever...

If you have those inrush thermistors in your junk box then you're probably an HVAC tech.

Some of those dc-dc units are marked backwards. So just in case yours is fubar the red wire goes to 24v. I use this gizmo to prevent the arcy sparky when connecting things. It precharges capacitors and/or otherwise brings things to similar potential when connecting stuff. It's two 25ohm 100...

If you have separate charge/discharge paths then you should use the two contactor option that I described. If you have a common port setup then two contactors won't help. There is nothing about the contactor/module idea that effects system operation. That is all built within the system...

I don't see the appeal of SSR. The forward voltage drop and heat loss is completely disqualifying for solar applications AFAIC. "...typical 1.2 volt on-state drop...1 watt per ampere..." https://www.galco.com/techdoc/crdm/d4840_crdmh1.pdf "An SSR with very high current capabilities may need...

The hold current is 157 mA.

24 volts. In some cases current energizing two contactors causes the Chargery to reboot. https://diysolarforum.com/threads/source-for-relays-for-bms8t.5749/page-4#post-70718 For all cases the relay module reduces the current of the Chargery relay drivers, which is limited, to almost...

My setup is common charge/discharge and the module is wired logical AND to work with a single contactor. If either IN1 or IN2 goes low the contactor opens. My relay module is just hanging unmounted right now. I mount lots of stuff on a control panel, which is a too fancy way of saying that I...

I guess I could cobble together a schematic. Here's the stepdown that I use. https://www.amazon.com/gp/product/B00BWKXTUU Edit: Diagram for common port single relay For two contactors run 12v+ through NO1/COM1 and NO2/COM2 separately to each coil+. The parts...

So far the best combination I've found for a Chargery relay setup is these two gismos. Everything you need to run one contactor for common port (by wiring the relay controller NO contacts in series to one relay) or two contactors. Plus you get an extra controller for cooling fans or whatever...

When the Photon Sorcerer speaks people should listen?

I have powerwall envy too but I'm also diggin' that BYD hoist. Is it motorized?

Here's another take on the Sigineer, which is imported. I have one and it works great. It handles microwave, air compressor, vacuum, heavy loads just fine. Good clean sine wave. https://amazon.com/gp/product/B00DE97PH0/