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Lol. That would be too difficult; but, yes, he can lower the amps going in simply by either lowering the charge voltage or limiting the charge (he can do that with his charger, but rather coarse adjustments - maybe in about 1A increments). Thanks!

Hahaha.. . Yeah, I know. I told him he can borrow my benchtop power supply, but says his pack is too big and heavy and not easily accessible after he put it in there. Ah, well...

The Daly BMS only disconnects the charging portion (one can still discharge), so basically, my friend will just not get to fully charge the battery until it balances out. The battery is already in service, but, instead of, say, charging to 280Ah, he probably gets to charge to only 250Ah (because...

A friend didn't top balance his cells. I would have lent him my benchtop power supply, but he didn't know I had one, and now too much hassle for him to disassemble pack (rather tight location and all that). He did connect them in parallel for two days (but reading in this forum, that didn't...

That would be high frequency inverters vs low frequency inverters. Or toroidal. They each have their own pros and cons. I used to be a big fan of the heavier ones as well. Still am. But high frequency transformers have come a long way. Am not an expert on them, so others will have to chime in.

I'm not going to out and out say Deye manufactures for Sol-Ark, but there's lots of indication that they do. Everything including the interface looks the same. Lastly, and it may not hold weight, because while Deye doesn't say it directly, their distributors do. If you try to get Deye from...

My understanding is that Deye manufactures for Sol-Ark. Sol-Ark may have requested for other features for the USA (and puerto Rico) markets. Check out also Sunsynk (also made by Deye). The distributor of Sunsynk made a video of a factory tour, and the factory was... Deye. Dunno pricing of...

I only put essential loads on the inverter, and my big appliances (like old A/Cs, heaters, etc) are still on the grid, and the inverter does battery grid sharing (like a slow, steady release). But, of course, if you're completely off grid, that doesn't apply to you.

http://www.batterysupports.com/60v-672v-57v-20a-lithium-ion-lipo-battery-charger-16s-16x-36v-p-444.html That looks like a 57.6v charger (maybe can even be set to other voltages), but not a balance charger like the one for RCs.

Do they come in 16S? If not, then I guess I still need the BMS.

Am very interested in getting a BMS that can be programmed to communicate with the Deye/Sunsynk/Sol-Ark inverters. I know there are batteries that can communicate with them (Pylontech, Dyness, Meritsun, etc), but those pre-built power walls are pricey. And this is, after all, a DIY Solar...

Haven't actually watched this (2 hours long) And Sunsynk website has the manuals (under tech support and downloads) http://www.sunsynk.com/ (better manuals than Deye website, but since they're essentially the same thing...)

It does that, too. You're talking about exporting to grid and net metering, right?

Took about 10-11 days. Hit 3.5v and stayed there (when I saw it, current was very low, like 2 amps). Put it to 3.6v, and within 2 hours if I remember correctly, it hit 3.6v. Disconnected the power supply, and after 30 minutes, it was still about 3.55v, and after about an hour, it was still 3.5...

Local guy (Philippines) makes these dongles for less than $50. He makes for many inverters and solar chargers so that people can wirelessly monitor their inverters/chargers via the Internet. I lent him my SmartShunt and he did some programing, and, voila! I can now monitor my SmartShunt...

So many cell sites in the Philippines, and they are mandated to replace the batteries every XX years. In places where there are lots of power outages (rural), the batteries are well used. In some (urban) areas, they have been on float for pretty much their whole lives. They actually have to...

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Good to know! Currently, max I can draw is about 60A (66A is max of inverter, and I set it to 90%). Future inverter I'm going to set up to replace current one, though it has 190A capability, I'll set max to 100A only (just about 1C of the 105Ah pack), but it will RARELY even see this. It will...

And, there you go - a very succinct explanation of why that is, and explains it in considerably less words than I would have. Good to know. As of right now, in my part of the world where the sun is currently at high noon, the 105Ah is charging at 11 amps and the 560Ah at only 23 amps (I have...

Please explain something to me: I have two packs in a battery bank. Pack A: 16S 105Ah, Pack B: 2P16S (280Ah cells) 560Ah. Each has their own Xiaoxiang BMS (aka Overkill). Both are connected to a busbar, to make the battery bank a nominal 665Ah bank. So, 105Ah and 560Ah packs - 16% and 84%...

If they derate their cells like, I think, Battleborn, why not? (wherein they use 120Ah cells, advertise it only as 100Ah, so now they can say DoD 100Ah or 100% of the stated 100Ah) Though I have my doubts if they actually did that.

Did you use your multi meter at the cell terminals themselves, or at the busbar or wire or other? If at the cell terminal itself, it might be the cell. If at the wires/busbars, it could just be at the connections (screw not tight, etc). Hope you are able to resolve this. Good luck!

But if it's parallel balancing, the cell with the highest voltage (and likely SoC) will discharge to all the other cells, therefore bringing its SoC down, so it cannot stay at 3.65 while the rest are not.

You mean while parallel balancing, or using the BMS balancer when the pack is already assembled in its 16S configuration? If it's the former (parallel balancing), it can't be at 3.65v while the others are at a different voltage. They'll all be at the same voltage. If it's the latter, then...

Ahhh...excellent... I'm all for "just overbuild it and not think about it anymore" (ie, "just double it up everywhere") but that is great info that shows its the series bar that carries most of the current.

Okay, i guess I'll have to look for longer screws (to accept the quadruple busbars on the series part of the cells). While Steve_S does says that, he also quickly adds he wouldn't do that (2P16S) and would rather have the redundancy of 16S2P with two BMSs. In another thread (can't recall...

Most of the time, the draw will only be in the 20A range. When water kettle goes on, it's about 50+A for about 5 min at most. If someone takes a shower with the water heater (we have individual water heaters per shower), maybe 150A also for only about 5-10 min. (Deye (aka Sol-Ark) inverter...

I meant making like a 2P16S single pack, the bus bars that connect between each 3.2v cell. In the "2P" part (two 280Ah cells in parallel to make a 560Ah 3.2v cell), do you need to double the busbars there? Was thinking that I think I have to double the connection between the series part (+ to...

Since the bus bar that normally comes with these Alibaba cells are lacking in impressiveness and thickness or width (hmmm... where did I hear that before? Oh, nevermind), most people ask for double bus bars from the sellers, or make their own from either copper pipe or whatever... Question...

Hard to say differences in SoC from voltage readings alone (got new cells from Amy of Shenzhen Xuba/Luyuan) and lowest voltage reading was 3.29 and highest was 3.34v. 32 cells are connected in parallel now (32P), and for the last 36 hours, are being charged (setting at 3.5) at a measly 17.8A...

Doh! Sorry! Brain fart for me! So, apart from that [hopefully temporary] mental block, when I get to the knee, I can switch over to 1A charging to creep up on the top balancing?

I read the article. All the graphs are showing 4.0 to 4.2v? It doesn't mention balancing to only 3.65 volts (way below the 4.2 in that article). Did i miss something?

You mean as opposed to the normal passive balance of 200mA or so? That's actually an idea: 1) connect the batteries in their final configuration (in my case 2P16S); 2) slap BMS with balancing (I plan to use an Active Balancer and might turn off the BMS balancer); 3) charge them with shore...

For the record, I am top balancing my LiFePO4 cells (https://diysolarforum.com/threads/top-balancing-recommendations-fastest-or-best-practices.12179/) But, just hypothetically, and out of curiosity, do you need to top-balance if all these conditions are met/placed: (for 280Ah cells) 1. All...

I just want to be there when they hit 3.6. Also, I figured it's very safe to leave it at 3.5+, and just look at it twice a day (by the way, no change at all today; several hours ago, about 17.8A was being pumped into it; maybe 6 hours later, it was still the same - I'll look tomorrow if, maybe...