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Depends on what you mean by a big deal. I speak from experience, storing for long periods of time at 100% will significantly reduce capacity compared to storing at 50%.

Yes, I also have a 3-ton unit with SEER 17 installed at about that time. It can keep up with the heat, but the humidity can be a problem during the monsoon season. I've installed a 12,000 BTU minisplit that I let run on low, which really helps with that. The old unit was 10 EER and 2.5-ton unit...

Yes.

Starting balancing at 3.35v is going to cause a problem. 3.4v is the setting everyone uses for a reason.

As long as you are using LFP cells, yes.

I purchased one of their 200 watt panels (12v). Compared it to some 100 watt Rich poly panels (about the same price, i.e. 2 of the 100 watt panels is about the same as a single 200 watt Alrska). Side by side, each of the Rich panels put out about 75 watts, the Alrska put out 140 watts. The...

I've been using the 8 gauge conductors when combining multiple strings. https://www.amazon.com/gp/product/B01L6OU4K4/

My take (and it's worth what you paid for it, nothing): EVE changed formulation (or something) and claims 6,000 cycles on their 280AH cells, that previously had been rated for 3,000 cycles. Lots of people bought their newer 280K cells and reported not meeting amp hour capacity tests, even the...

I have. I've also purchased "grade B".

I can confirm these work fine in series: https://www.aliexpress.us/item/3256802152358272.html I can confirm (through talking to their Alibaba support, if you order less than 5) that this is their actual storefront on AliExpress: https://www.aliexpress.com/store/1101682188 This DOES NOT...

Overkill Solar BMS app example. Only two toggles, Bal. only when charging, toggle off when trying to top balance. Start Voltage - 3400 millivolts is what you change, first to 3.45 (3450) then to 3.6 (3600). Different apps have different locations and probably nomenclature. When finished, just...

I've used the method I mentioned for a couple of years and had zero problems. Certainly zero stripped threads. You mileage may vary. The M4 holes are factory drilled, and won't be crooked like some have reported with the "we hired someone for a dollar to tap them for you" vendor drilled holes...

I can confirm this one is the correct store front if you want a JBD BMS. https://dgjbd.en.alibaba.com/ I've ordered from them multiple times, and they will customize if you place a large enough order. Very prompt shipping as well. I can confirm this works well up to (and including) 4 in...

I've tested Daly, JBD and JK BMS pretty extensively. I've found the JBD to be the single brand that actually lives up to their rated claims the best, without smoking things if suddenly shut down. Daly would be the one that is least honest, and has very poor quality control. I haven't tested it...

I've also found a cheaper source willing to customize (as in you could get it with a JK BMS rather than a Seplos BMS). https://szluyuan.en.alibaba.com/productgrouplist-916886693/Battery_box_case.html I've tried one of their cases for the 105AH EVE cells and a JBD BMS and was quite happy with...

One thing I'd like to throw out there for others....... The EVE 105 cells come from the factory with M4 threaded holes. Unlike the larger cells, these are done at the factory and have considerably better fit and finish. I would recommend buying them this way, and forgo the addition of the...

I just wanted to add a (looks like) good source for battery boxes/cases for the DIY: https://cneel.en.alibaba.com/

I had to look it up, it's a 1220 battery. :) I highly recommend their supplies. I can tell you, the Lincoiah supplies that were "recommended" by Aliexpress *WILL* kill your unit. https://www.aliexpress.us/item/3256801441733809.html Lasted a little over a month before killing my RD6018. I...

Very accurate description. :) Good suggestion. For anyone interested I did some measurements of the diode temperature (measured through the PCB). https://diysolarforum.com/threads/battery-cell-capacity-testing.16745/post-220494 That is the primary advantage of this tester, the sense leads...

The way JBD "works" makes it pretty easy if sometimes lengthy to get things balanced (how long depends on how far out of balance the cells are). When you turn off the "only balance on charge" setting, what it will do is burn down any cell above the voltage you set. My method: 1. set to 3.45v...

Sorry, I missed it. https://www.aliexpress.us/item/3256803558326998.html The 1000W68V is the power supply I've purchased; I see they have a new one rated at 1200 watts using 220v. I think (I'd have to take one apart to be sure) that it is an NVV supply. I see these notes: NOTE: 1. 1000W...

Try different versions until you find one you like. https://wnsnty.xyz/resource/xiaoxiang He links to all the older versions he can find.

I think I had to get a newer version of the software. https://www.lithiumbatterypcb.com/smart-bms-software-download/

Sounds like a very non-standard cell terminal. The one I suggested works well for 1/4 inch or M6.

JBD didn't supply already manufactured ring terminals on any BMS that I have purchased from them. Sounds like your vendor did a poor job of testing.

I just bought the correct size crimp connector. I will admit they are difficult to find, and expensive. https://www.crimpsupply.com I suggest part number 11A28016. https://crimpsupply.com/26-24-ga-heat-shrink-ring-terminals-1-4-stud.html As an alternative, the doubling as you suggest works...

Sounds like you have a bad connection. I suggest you jiggle each wire one by one to find out which. "Heavier duty" balance wires are not what you need to fix your problem.

The biggest difference is that you can buy LFP cells now. Everything about sodium cells is still "yet to be determined". A bird in the hand........

Probably less trouble, did you consider one of these? Only 60 amps though. That's a heck of a bridge rectifier, but if you already have a variac.... https://www.digikey.com/en/products/detail/HRP-300-3.3/1866-2720-ND/7704306 Yes, adjustable from 2.8 ~ 3.8V.

I've been purchasing the real Anderson connectors (not sure how good the Chinese copies are). https://powerwerx.com/anderson-power-powerpole-sb-connectors As @Will Prowse noted in a recent video, even the ones rated for 45 amps will get very warm when run at rated capacity. My first try was...

That's 3.55v per cell. Good enough.

One of the reasons I dumped my Daly, never showed anything but zero cycle count. I finally figured out that even though I selected and purchased an LFP BMS, it was set to not count as "full" until above 3.9v (or something like that). In other words, they took a BMS for a different chemistry and...

I think your cells are slightly out of balance due to having the balance start voltage set too low previously. All the settings look good to me (or at least safe). You can of course tweak the high and low settings as others have suggested, just don't go below 2.5v or above 3.65v. I think a few...

Money. Contrary to what you are thinking, they use different FET parts depending on the current direction. So if you need X number of FETs for 100 amp discharge, you need the same number for 100 amp charge. Most people don't have 100 amp chargers, so they save money.

If you don't let your cells exceed 3.65v then they won't swell. At least mine haven't.