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No, I have 1"-wide strips along either side. So it's resting on the tops of the cells themselves, but not on the terminals. The net metering rules here aren't the greatest, but again, battery backup was actually a big part of my design goals. It's nice to have a battery pack that will power...

Yes, that is feasible in .us, and (since it doesn't require the purchase of batteries) it can be considerably less expensive. But there are a couple of reasons I chose to do it this way: I wanted the battery backup. I don't have frequent power outages here, but they do happen, and I've had a...

Details? Well, this is what I used for battery: https://batteryhookup.com/products/new-12v-100ah-lifepo4-kit-w-bms-low-temp Overkill to be sure, but it included the BMS, and I didn't need to mess with bus bars as the cell packs have flexible wires. The four cell packs fit very nicely into the...

Here's what I came up with:

Yeah, I should have updated the thread. I adapted one of Will's milk crate builds, leaving out the solar charge controller, and using 4x 100Ah packs from batteryhookup.com. Way overkill for the power capacity, but it's working well so far.

So just to make sure I'm not missing anything--"double-conversion UPS" is really just line -> charger -> battery -> inverter -> load, right? Ignoring trying to get fancy with monitoring, of course.

I'd like a minimum of 2 hours, and wouldn't mind more than that. If I call it 300Wh (as I mentioned in my OP), that gives about 3 hours' runtime, ignoring conversion efficiency and such--a 12V, 25Ah pack would handle it. At that rate, battery would be the cheapest part of the system, so I'd...

I'm open to building or buying. I'm willing to pay a bit of a premium to buy--it'll look much more "finished", which will help the WAF (and this will be in her domain), but that depends on there being a commercially-available product that does the job and isn't multiples more expensive than...

It's a little OT for this forum, as I'm not really looking to use solar power for this, but I'm really looking for something that could serve as a UPS, running a constant load of about 100W, for a few hours--call it 300Wh or so--and using LiFePO4 batteries. Pb-acid don't seem to last long in...

No, as I said in the text you quoted, I'm monitoring it on a Linux server, though you could do the same thing using a Raspberry Pi. See: https://github.com/jblance/mpp-solar As a bonus, it will also let you monitor the Daly Smart BMSs that are the subject of this thread.

Hadn't thought about it, but it's an idea. It would take some re-wiring, but it could be feasible. Lighting for the main shop is a kW of LEDs, but the "clean room" in the back (where the server rack, 3D printers, reloading bench, etc. are) is about 200W worth. What I don't yet have worked out...

The mounting hardware is Rib Brackets from S-5, which I found at altestore.com. Surprisingly expensive, really--even without rails and racks, I still spent half as much on that hardware as I did on the panels. The server rack ordinarily draws 1-1.2kW, so the batteries power it for 5-6...

Since it's pretty well all up and running now, here's what I have set up in my workshop. I'm using eight 250W panels from SanTan Solar, a MPP Solar LV2424, and 8x 272Ah LiFePO4 cells for storage, to run my server rack, and hopefully bring the electric bill for my workshop lower than the one for...

I ended up buying both a USB-RS485 and a USB-UART adapter off eBay. The 485 still didn't work, so that's three separate RS485 adapters that didn't work--I'm not sure if my BMS is just defective or what. Fortunately, I am able to communicate using the UART adapter. I'm using this software to...

I've now tried with a different RS485 adapter, suspecting the original one might be defective. Connected its A and B terminals to the wires that should be A and B according to the manual--no comms (or any other response) with their software. Swapped those two wires--still no comms. Running...

So, following up on the wiring issue. I've added a wire from the GND terminal to B-; that resulted in no change. I tried plugging in the "light board", also no change (no reason it should have made a change, but there's also no reason it should be needed to turn on the BMS as it apparently...

I actually hadn't thought about that, and it'd be interesting to try. But it looks like the author of the software I'm using to monitor my MPP inverter is willing to add BMS support as well, so that's likely the direction I'd be going--assuming I can get the connection working at all...

Well, perhaps not. The batteries are finally here (boy, was I optimistic when I said back in December I expected them in "a month or so"), they're wired up, the BMS is connected, and as far as the solar system is concerned, it's all working. But there's no communication. I'm guessing it's...

I'd say so. It definitely isn't inadvertent: https://github.com/njfaria/dalylog/issues/1

It's a compiled binary for ARM architecture--that's the only code made available for download. No source, no x86 binary. I'd assume it could be compiled readily enough for x86, if you had the source code, but AFAIK the only one who has the source code is the author.

No, it's a lie. The link that says "source code" is just an archive of the contents of the GitHub repo at that time--which contain only a few screen shots and text files (if you don't believe me, download it for yourself and see). The link that says dalylog_0.9.1.zip contains a compiled...

So I ended up not using SolPipLog; it doesn't support the protocol of my inverter, and it will only run on a Raspberry Pi (despite supposedly being open-source software, the developer doesn't release the source code). Instead, I'm using mpp-solar: https://github.com/jblance/mpp-solar It does...

What you're dealing with there would be the raw RS485 signals--to get them to talk with an Arduino would still take an adapter (something like https://www.amazon.com/SMAKN%C2%AE-Adapter-Serial-Converter-Module/dp/B010723BCE, I think). Then, it's just a matter of implementing the protocol...

It's unfortunate that he doesn't post the source code (for this or for solpiplog, though the latter is explicitly claimed to be open-source), only compiled binaries that will only run on a Raspberry Pi. But it does seem to be the only product currently running that will monitor the Daly BMS.

I'm not using it yet (still waiting on batteries for my system), but this one looks pretty good: https://github.com/njfaria/SolPipLog My idea is to log the data using MQTT to a Kotori server: https://getkotori.org/docs/ SolPipLog isn't really what I want; I'm not at all interested in the...

I think it's just illustrating where the A and B pins are on the adapter. From what I can tell, it's A to A, B to B.

I suspect neither of those are needed. The USB adapter shouldn't need external power; it gets it from the USB port. And, as you say, the BMS itself has power. AFAIK, RS-485 signaling just takes the two wires. Won't be able to test it for sure until my cells arrive (a month or more to go on...

Maybe the manual has been updated, or maybe I overlooked this previously, but the answer seems to be here:

I don't recall seeing it in the manual, but I'll check again--thanks. And for confirming that the fallback idea should work--the batteries won't do much of anything, but if they let the rest of the system work, that's good enough.

I'm setting up a solar system in my workshop based on the MPP Hybrid LV2424. The inverter is here, most of the wiring and other components are here, the panels will be here in a few days--but the batteries have yet to even get onto the slow boat from China. Is it possible to use this device...

Wondering if someone can give me a hand with my 485-to-USB device from the unit I bought back in May. Rather than a single cable, I have two. The first, apparently, is a USB-to-485 cable, whose end looks like this: The screw terminal block unplugs from the other part of the green connector...

That seems like gross overkill, even based on their chart. A 2.4 KW inverter at nominal 24 volts would be expected to draw ~100 amps. Per their chart, 2/0 cable has an ampacity nearly 2x as great (195 amps). OTOH, 4 AWG is listed as handling 95 amps, and that's the wire gauge recommended in the...

My order arrived yesterday, appears to be just as described (except that the screws aren't security T8 as the page says; they're perfectly normal T10 instead). Though I'm starting to wonder if I haven't bitten off more than I can chew--getting these into a 12P8S configuration is going to take...

If not, I'm sure it could be reverse-engineered readily enough--but it'd be much nicer to have the standard, so we'd know how it should work.

Perhaps my question wasn't clear. I understand that there are three different wire protocols; I'm wondering about the data protocols. CAN may be its own thing, but UART/RS485 are serial communication protocols. So I plug in a USB/serial converter, I set it up with 9600/8n1, and I can talk to...