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I need to power off my BMS to install a LCD screen. I'd like to avoid having to precharge my inverter again. What's the best series of steps to power off the BMS? I'm thinking: 1. Remove load from inverter 2. Do this at night, when PV input is virtually zero Next steps I'm not sure. 3. Turn...

Looking for the best BMS that supports the pylontech CAN protocol, I have a Deye inverter. I do not want something recently released. For example, the newer JK-BMS that supports Pylontech CAN is too recent. I'd like something more stable. I also don't want to have to build custom wires for the...

Bought this display for the JK-BMS. https://www.aliexpress.com/item/1005004027834830.html It's got 2 loose wires (no button) for the on/off switch and needs a 12V power supply. Oh joy! Ok so questions: 1. When an on/off switch is 2 loose wires, you touch the wires together to turn the thing...

Charging for the first time, Deye 8K inverter. Where do I tell the inverter the voltage where it should stop charging the battery to avoid overcharging? Is it this screen? Absorption V = stop charging the battery at this value? I'm using a 48V 16S EVE 280AH battery

Battery discharged to 47.63V (average 2.97V per cell) because inverter didn't stop discharging the battery. (Still trying to figure out the Deye inverter low voltage disconnect settings, if you can help, I made a post about that here). Cannot charge from grid because grid not yet connected...

I want the inverter to stop discharging the battery based on voltage. I do NOT have communications between the BMS and the inverter. Sounds stupid but I cannot find where to set that in my Deye 8K.

JK-BMS is reading only 3% SoC, but cells are averaging 3.317V each. Where is it getting 3% SoC from?

Read that you can increase the longevity of your inverter by having panels facing, for example, north and south, or east - west, rather than having all the panels facing south. This is because the load is spread out during the day. You avoid having a big peak where all your panels reach their...

Sorry for this wall of text, I tried to keep this short but it's not easy. There are other ways to handle electrical system grounding (aka earthing), and other countries do it differently from the United States. France and Japan use a "TT" type electrical systems which: - do not bond...

I have a jumper connecting load neutral to chassis in my inverter. Maybe called a N-G bond? Not sure of the terminology. Does this wire need to be a particular gauge to be effective? Currently it's just a very thin 18AWG.

The words "neutral" and "bond" do not even appear in the Deye manual. Is there a screw inside? Do you manually run a jumper from the neutral on the load connector to case ground?

I have the Deye 8K inverter. The manual says: "To avoid any malfunction, do not connect any PV modules with possible current leakage to the inverter. For example, grounded PV modules will cause current leakage to the inverter. When using PV modules, please be sure NO grounding." But everyone...

I've already purchased SMSEACE FCY8-63 (16A, 2P, 500V) breaker/disconnects for our PV array. Explorist solar youtuber says you should buy at least 30A PV disconnects: Makes me concerned that the 16A rating on these disconnects is too low. My solar panels are: LONGI SOLAR HALF-CUT...

Need a switch to bypass the inverter. Maybe it's called a transfer switch? Meaning, in cases where I need to work on the inverter and we want to keep the electric working in the house, want a way to be able to switch grid between the inverter and a direct connection to our electric panel. We...

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There's a "silver" version of the JK-BMS which has a place I can bolt my battery negative wire, that I understand. But the black style JK-BMS I have (JK-B2A24S20P ) I have just has these tiny short battery wires. Are you supposed to unscrew the black cover and put your own size/length leads or...

Has anyone on the forum suffered this problem? And if so, what is the cheapest & easiest countermeasure? My panels are in a temporary location so I don't want to do anything elaborate or permanent. I personally haven't had a problem yet, but want to avoid one in the future if its a common issue...

Hi guys, it's kolek again, the village idiot with zero DIY skills and no qualifications to be doing electrical anything. Is it ok to use busbars instead of wire like I'm doing below to make connections? Like below connecting the busbar to the 200A breaker? If you guys approve this, all...

Is a 200A DC breaker too large for wire that maxes out at 175 AMPS? I'm assuming the answer is yes. I'm in Japan and wire sizes are different here, the size of the wire in question is "60 SQ" Which is between AWG 1/0 & AWG 2/0 in size. For comparison sake: AWG 1/0 = 170 Amps = 53.5 SQ AWG 2/0...

I understand the simple resistor pre-charge circuit that people are working with here, but what about the case where, as @FilterGuy writes "BMS kicks off for a while, the [inverter] capacitors will discharge and when the BMS kicks back on, there will be no pre-charge...." Maybe @meetyg has an...

Say I have 4 large 280AH batteries with a high state of charge, and 4 more with a low SoC. I assume if I use big busbars and parallel these 8 batteries there could be drama like sparks and possibly even damage to the cells. I have some 18awg wire, could I safely get around this by just using the...

LF280 cells purchased from Amy at Shenzhen Luyuan 2 years ago. Supposedly her best "Grade A" batteries. The batteries have never been used. Using battery charger, charged a group of 6 batteries for the first time to 3.56V. Now after just sitting for 2 days, the charge on each of the 6...

My unfinished system: Inverter: Deye 8K BMS: old JK (not the "inverter" version) Battery: 16S2P (32 280AH cells) The JK BMS suck at monitoring battery SoC. Some say use a Victron Smart Shunt to monitor SoC. I'm unclear on how important it is to have a smart shunt monitoring SoC. Say, on a scale...

I was planning on not having a switch on my battery, and just unplugging it using an Anderson connector when I need to disconnect it. But I still need a precharging circuit. Someone should sell a pre-charge connector for Anderson connectors, but since they don't, what's an elegant way to...

Someone please fill in the X. You don't take a totally empty cell and put it in parallel with a full cell, right? Read somewhere on the forum they must be within a certain voltage, like 0.01V or 0.1V or something like that, but can't remember what the number was. Assuming standard 280AH cells.

I've been trying to top balance a 16 cell battery in sets of 4 (in parallel, using a charger), but it's taken 1 week and I've made little progress on the first set of 4. Here are the voltages of the 4 cells I have tried to charge: 3.343V 3.340V 3.333V 3.332V (They didn't charge evenly because...

I decided to top balance my cells to 3.45V instead of 3.65V because of the conclusions of this video: Other advantages: it leaves a larger margin for error and probably leads to greater battery life. I know 90% of people here go to 3.65V. So tell me why this is wrong, and I should be charging...

I believe @Steve_S said somewhere it's faster charging individual cells than groups of cells. Meaning, for example, it's more than 4X faster charging a single cell than a group of 4 cells. Is this true, and how much faster is it, roughly? Also, related question, I'm using 18GA wire for...

The newer version of the JK-BMS will talk to inverters, and there's a project to allow the JK-BMS to talk to the inverter. It would mean my JK BMS could talk to my Deye inverter. Sure it's cool, I get it. Maybe you can implement some cool charging strategies, etc., but beyond things like that...

I have a row of 8 batteries at low SoC held tightly by thick sheets of aluminum at either end. The nuts on the threaded rods are just slightly tighter that I can tighten by hand, 5 in-lb. Hard plastic separators between the cells. No springs, no rubber, no extra room for expansion at all. EVE...

This is an anti-DIY message specific to DIY batteries, so I apologize, but my message for the masses is, unless you know what you're getting into, consider buying a pre-assembled battery. Deciding to DIY my solar battery was one of my worst mistakes ever. I'm still not done yet, and so far the...

Prior to the recent problems with the new JK-BMS, it seemed the consensus was that JK-BMS was better than Daly BMS. Now it's less clear, at least in my mind. I'm leaning toward the JK-BMS. I have both the Daly 16S 48V 300A BMS and the JK-BMS 200A 2A model to choose from. Battery is EVE DIY...

Hey guys, in the event the AIO inverter fails for whatever reason, I don't want to rewire the grid to loads panel connection from scratch. So I'm trying to figure out the best way to switch the grid connection between the loads panel and the AIO inverter. Basically, if the AIO inverter fails, I...

Normally, when you have a networked device like a router, you can connect to it and login to the admininstrative interface. With Deye's stick logger, all you can do is login to it for the sole purpose of configuring it to connect to your home WiFi, so that DEYE engineers and other 3rd party...

Has anyone in the history of man been able to get their Deye / Sol-Ark / Sunsynk inverter to run strictly on solar without battery or grid? I'm just wondering if it's possible to use it this way in SHTF situations, assuming battery and grid failures. Don't worry, I understand it doesn't "work...