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I've been making a few changes to my system and may have briefly disconnected the MPPT from the battery, whilst the panels were still connected. The screen on the MPPT is now flashing on and off and displaying zero volts for the battery. Wires are all connected and breaker is on. Have I just...

I've just built a 4S pack with a 200A JBD. This is my second build, and my third JBD (I previously upgraded from 120A to 200A on my first project). I noticed that the new battery is offline. I cannot get my original Xiaoxiang app to connect to the new battery. I've downloaded a different app...

I'm building a 4S 280Ah bank using a 200A JBD BMS. Unlike my previous project, the BMS has two M5 holes for connection on each side. I'll be using 70mm² cable, connecting to the single stud on the battery, and to the shunt on the other side. Do I: - ignore one of the terminals and just run a...

I'd like to add PV to my house. I think I've got a lot to learn, although I do know some of the basics as I built a 1.2kw system on my boat already. At it's most basic, can I install some panels, a grid tie inverter, and a diverter, to use solar to heat a tank of water? Are there any other...

I'm running a 4S 271Ah bank, built from bare cells and using a 200A JBD BMS. Very happy with it, only thing is, it's a bit smaller than I need. Charging is from solar only, using two MPPTs that top out at about 45A max. I also have a little Sterling 60Ah drop-in with integral BMS. It's non...

I've finally got round to adding a monitor to my 4S system. It seems to think I have a discharge current of around 220A, when in fact the system is, as I write, charging at about 4A, according to the BMS, as we approach sunset. Any suggestions? Duff unit, bad connection somewhere? Or is there...

I've got a Sterling Power 60Ah 'drop in' battery. It's usefulness is limited because the inbuilt BMS doesn't have Bluetooth. I also have a spare 120A JBD, as I just upgraded another battery which I built from cells. What are the chances that I could open up the Sterling and swap out the BMS? I...

Hi everyone My system has grown quite messy and it's time to rethink and start again. I have a long narrow space in which to fit my LFP pack, inverter, and all the busbars etc. So everything has to go in a line (the space is only ~50cm high but 1.5m long). There's a couple of MPPTs to fit in...

My boat has a pretty basic shore power system with a 16A connection, a breaker, and then a few 240v sockets around the cabins. I don't believe there is any sort of ground to any part of the boat itself. I've also got a Victron Phoenix inverter (not an inverter charger) which currently just has...

My previous inverter appears to have died. In discussing with the supplier, they suggested that an abrupt loss of power after BMS cut off might have been a factor. Not that I recall this happening but it's obviously possible in certain circumstances. Surely an inverter should survive this...

My Epever inverter has been working well for about a year. It's a 3kw model and as my system is constrained by everything running through the 120A BMS, the inverter has never had to deliver more than about half of its rated output. It's now showing no lights, no AC output, nothing at all. I...

Looking at installing a pair of Phoenix 1200w inverters. The cost seems to be about the same as one larger unit, and obviously it will give me more flexibility, e.g. in case of failure or to reduce idle loads. Any reason not to go down this route? Does it have any disadvantages?

I'm running a 271Ah 4S bank through a 120A JBD BMS. Has been working well for nearly a year now. I use it to run cooking equipment daily. So maybe an hour total on average I'd guess pulling 60A or so. But shorter periods of time pulling close to 120A. Should I expect a limited life out of my...

Six months in I am fine tuning my system. I have a JBD BMS, and an Epever Tracer MPPT. When I first set it all up, the BMS would cut out at full charge, which I understand is bad for the MPPT as it no longer has anywhere to sent the power. I appear to have got away with this but I was generally...

Last year I put together my 4S 271Ah Lishen pack and have been using it quite successfully for a few months aboard my boat. The balance has gone a bit off and I have decided to rebuild the pack, taking the opportunity to do a top balance and to do a better job of the connections. I see a lot of...

At the start of the year I ordered 4x271Ah cells from Shenzhen Basen. Total price to the UK was £350. I'd like to build a second pack but they're now quoting £485, although this is for delivery to the EU as I've since moved abroad. Is this just the way the market has gone, and any suggestions...

I've got a 271Ah Lishen 4S pack with a JBD 120A BMS. Working pretty well on my boat, powering the fridge and induction cooker, charged by solar via a 40A MPPT with 520w of panels. The other charging source is a 30A mains charger. I also happen to have a small drop-in 60Ah from Sterling. I...

Been using my 4S 271Ah system for about two months now, it's installed on the boat that I live on. I have a JBD BMS. Recently I've noticed that when drawing a next load the balance is no longer good- up to 0.2v. I cleaned up some contacts which helped a bit but still not happy. I was watching...

I'm trying to get my SCC to talk to my windows laptop. I have the correct cable and I have downloaded the V1.95 software from Epever. And that's as far as I've got. I looked up an online 'how to' guide but it seemed to be a slightly different version of the software, with different tabs on the...

I've been looking at different installations and seeing it's quite common to use MRBFs on the battery terminals, then a big class T, and then smaller fuses for individual circuits. At the same time I've read that fuses can run hot, which sounds inefficient. So is it best to minimise the number...

OK be gentle... and I do apologise for the quality of the sketch! I haven't included cable sizes yet, but I need to measure how long the runs are before I make that decision. There will actually be two separate sets of PV/MPPT but I've only included one just now, for clarity. I also haven't...

I understand that I need an isolator and a fuse between my panel and the charge controller. Can I just a suitably rated DC MCB, and kill two birds with one stone? In fact is there any reason to use MCBs throughout? It would allow me isolate different parts of the system whilst minimising the...

Asked this already on another section of the forum but no takers, so apologies for repeating it here. I have a JBD BMS (same basic idea as Overkill). 120A. I would like to run an inverter and control it via its remote switching port. From what I've read I can't really do this using the JBD, but...

I've got my four 272Ah cells and my JBD BMS. Have now completed the top-balance. So it's time to do the final assembly of the pack. I'm not short of space on the boat, the pack can go pretty much anywhere. Thinking of keeping it fairly central, not too low down and obviously not within the...

I had my system all designed and priced up, and then I was offered a set of panels so cheap that I could not ignore them. My understanding is that the key parameters are voltage and current at max power (happy to be corrected if I've misunderstood). So the panels I now have are: 1x 100w...

Seeing as Overkill were sold out I went with a JBD unit. Bit surprised to find no instructions or documents included whatsoever, but I suppose you get what you pay for! I'm trying to follow the instructions on the website...

So I've been seriously considering either Electrodacus or Overkill/JBD for my BMS. This is for the domestic electrics on a liveaboard sailing boat. I came very close to choosing Electrodacus, but it looks like a JBD-based system is going to come in much cheaper, and probably be simpler. Looking...

I'm not expecting a definitive answer on this, unless anybody else has actually used this exact model of inverter: https://www.epsolarpv.com/product/72.html From what I can tell based on the line drawing in the manual, this inverter does have a rocker switch. hard to tell for sure. Are there...

If I wanted to boil it down to the bare minimum, how simple could an Electrodacus-based system be? E.g. a Victron Battery Protect on the charging side, another one on the load side, and a SBMS0 in the middle? I know this might not be using the Electrodacus to its full potential, but I'm...

I've narrowed this down to ??three models. - Epever Ipower Plus. £375. I like the recognisable brand name, and the totally configurable LVD settings. Downside is apparent lack of remote, few reviews available...

In addition to my yacht's main house bank, I am going to buy a small (60-100Ah) drop-in type LFP battery. Primarily this will be used for the trolling motor on my dinghy. I can buy a very cheap 'Ultramax' 60Ah battery- £245 including a charger. But it's only just big enough and I bet the BMS...

Looking for an MPPT SCC for installation on a yacht. Have been offered a used Morningstar Ecoboost for a good price. Would this be a better buy than a EPever for similar money? I'd be using it with a 32v panels, and a DIY LFP battery with most likely an Overkill BMS (if any of that is relevant)...

I'm looking for a pure sine wave inverter as part of my yacht electrical upgrade. The loads I would be running include a 1600w induction hob and a laser printer. I will be powering this from a bank of 4x280Ah LFP cells. I would like to configure the BMS to cut off the inverter's on/off switch...

Hi, me again... still planning my LFP system for my boat... still not quite made any decisions! I can't find an answer to this, and it seems an obvious idea so many it won't work. But could I use a BMS to shut off the AC side of an inverter when the low voltage point is reached? The massive...

After putting this off for months, I really need to get my cells and BMS ordered. The system will power cooking/refrigeration in a yacht. I don't anticipate operating in low temperatures. I've decided to go with 4x272Ah Lishen cells from Shenzen Basen. The only charging sources will be MPPT...