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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...

Battery heaters: expensive Pet bed heaters: cheap Pet bed heaters use 15 - 75 watts depending on the model and some will run on 12 volts, have thermostats, etc. Also 12v heated travel blankets draw as little as 45 watts which works out to 30ah for 8 hours of warmer sleep. So is it possible to...

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...

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...

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...

Same here so I'm listening for two thumps on my front deck. Couple of hours maybe.

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.

Search for "5/8 ring terminal" for more choices. https://crimpsupply.com/12-10-ga-ring-terminals-5-8-stud.html https://www.amazon.com/Morris-Products-10076-Terminal-Insulated/dp/B005GDFHH2

I built a temporary sled out of scrap wood which used an extension ladder like a track. I had my son load panels and I pulled them up with a rope. It worked great. No dropped panels. No falling from ladders. No renting expensive equipment.

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

Temco sells on Amazon. Stocks are somewhat limited right now. https://amazon.com/Temco-Solar-Panel-Power-Copper/dp/B071412PMV https://amazon.com/Temco-Solar-Extension-Connector-Female/dp/B071NPT6LR/

I've been working in electronics since the 70s and I've ever made a mistake except once... er twice... ah hell who am I kidding... I exploded a chunk off the end of my thumb while repairing a transmitter out of a radar system. 4KV lightning bolt... crack! Hooked up an electrolytic capacitor...

Five of those panels in series would get you over the "minimum operating voltage" in full sun. Under shaded or cloudy conditions the voltage will drop below that minimum. It's an odd specification a minimum 120v. Put your five panels in series and see how it goes. Worst case is it doesn't charge...

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.

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...

https://smile.amazon.com/dp/B005GDFGIM?tag=duckduckgo-brave-20&linkCode=osi&th=1&psc=1&sa-no-redirect=1

Hovering over the "i" gives "A measure of the severity of solar proton events as depicted in the NOAA Space Weather Scales" so I am not following the comparison with panel production. There might some loose correlation but photon measurement would be directly relevant.

In case anyone is wondering if there is a difference in electrical conductivity between C110 bar stock and the C122 copper tubing at Home Depot the answer is no. Both are 99.9% copper. There is a slight difference in chemistry due to the way the copper is processed. C110 contains a maximum of...

At $.091/KWH you're not going to save money running a generator and your cost recovery on solar is going to be many years so backup power during outages is probably all you really stand to gain. You'd need a 7KW array or 7KW generator producing for 6 hours to make a day's worth (40KWH) of...

The Epever controllers have four built in battery profiles; Sealed, Gel, Flooded and User. That USER profile can be customized. Here's what Battleborn says about charging their Lifepo4 batteries with EPever.

The 24v 50ah Battleborn batteries are 60A continuous or 2880 watts for a 48v series pair. Each pair you add in parallel will get you another 2880 watts continuous.

MageBracket ships fast through Amazon. https://smile.amazon.com/MageBracket-Corrugated-Mounting-Brackets-Installation/dp/B07WNGLLRD/ref=sr_1_12?dchild=1&keywords=magerack&qid=1585662479&sr=8-12...

For pumps reliability comes from keeping spares. https://smile.amazon.com/12-Volt-Battery-Portable-Electric-Transfer/dp/B074T9C3JX/ref=sr_1_16?dchild=1&keywords=12+volt+head+height+water+pump&qid=1585663979&sr=8-16

For stripped posts an alternative to tap/helicoil is get the next size up set screw and a self tapping screw to cut the threads. https://www.amazon.com/4-20-Floorboard-Thread-Cutting-Screws/dp/B07D3P3QK8/ http://www.amazon.com/Stainless-Screw-Screws-Bolt-Dropper/dp/B07D1L6RRD/ For batteries...

OP has a modified sine wave inverter and the 98 volt RMS reading is typical. https://www.amazon.com/2000W-Inverter-Remote-Control-Display/dp/B07RQYX45Z A modified sine wave will make a UPS go ape shit. Power strips with surge supressors won't like it either.

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

I have a SUNGOLDPOWER inverter/charger 4000w in my garage. This one. It works great. Good clean sine wave output. I have no trouble running my compressor and power tools. I think it's a good choice and the price is good. As near as I can tell both the AIMS and SUNGOLDPOWER units are built at the...

Looks good! This will keep your AGMs balanced. https://amazon.com/gp/product/B07L8XKZ71/ I use one per series pair but you can use as few as one for the whole bank since the batteries are matched. As for the mounting... shading will be cooler. I think the main considerations are strength...

More info. https://newatlas.com/3d-vertical-solar-towers/21952/ https://pubs.rsc.org/en/content/articlelanding/2012/ee/c2ee21170j#!divAbstract

Voc test: Pass Vmpp test: Pass Some current is flowing. Enough to power the meter. So I am betting that ~3 ohm load will give the rated Impp. Your panel will kill. Seriously though it looks like that panel just needs a load.

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/

The consensus is that the screws for CATL cells are M6 and that is what worked for me.

The hold current is 157 mA.

https://smile.amazon.com/Petfactors-Controller-Waterproof-Thermostat-Maintenance/dp/B07WHGVKG7/ref=sr_1_4?dchild=1&keywords=pet+bed+thermostat&qid=1585438933&sr=8-4...

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

I'll post a guard.

Same here so I set email alerts on the Fedex site. Now I only check it twice a day!

Using two Leaf batteries (15v) on 12v spec is more feasible than using three Leaf batteries (22.5v) on 24v spec. The panels you have would run fine in parallel. For series I'd need to know the current to see the trade-off. Series current is limited to the lowest panel. Parallel voltage is...

My 8-pack with a BMS8T is part of a much larger bank so it never sees more than 50 amps charge/discharge. For now I'm getting away with these cheapys. They don't get hot. They drop 9 mV at 24 V 50 amps and the coil current is 80 mA. If your charge/discharge amps are higher or you have an RV or...

By 2s5p I mean 2 panels in series and five of those series sets in parallel. You'll need 10 gauge from each pair to a PV combiner and 4 gauge (THHN ) to the charge controller. Ideally you would position the combiner closest to the charge controller.

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

Anything that has a cooling fan needs a cool air supply. If you enclose it in a space it will recirculate it's own heat exhaust and get progressively hotter. Adding two vent holes (in/out) and ducting the Bluetti fan would be the most efficient. Adding a fan to push or pull cool air through the...

I have a system with the identical battery configuration. I use one of these on each series pair. https://www.amazon.com/dp/B07L8XKZ71 It keeps each pair perfectly balanced. My batteries are well matched so most of the time it does nothing. It's mostly active when the charge current is high or...

Well done!

I don't know if this example is anything close to usable for your application but... virtually any way you can put a fan into a foam lined enclosure will help a lot with the noise. I have gotten good results baffling these 9 inch fans inside a foam lined 5 gallon bucket. The buckets are easy to...

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...

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