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They were discounted from £180 to £144 soo I hit the trigger and bought 16 https://www.fogstar.co.uk/collections/lifepo4/products/eve-lifepo4-280ah-prismatic-cell I see they also sell cases, but they fit 4 each, is there any point in storing 16 cells in 4 different cases? I guess I would still...

I'm planning on mounting some panels on the ground for an off grid or grid tied system (but without being paid for export) My house consumption doesn't change much between summer and winter. While it obviously makes sense to point them towards the south (rather than east+west) to maximise daily...

I have 16 EVE LK280 Grade A which I had top balanced about a month ago; they are normally all at the same voltage at high state of charge, but a couple of times I took them close to 10% SoC (which is as much as my inverter would let me) and noticed a 180-190mV imbalance with a 8A load; the...

I'm planning on building an off grid 12kW system with 30kWh battery. The panels I'm looking at have an open circuit voltage of ~50V and I was going to create two strings of 12 panels each, but I can't see many MPTTs accepting 600V, so maybe I need to limit myself to 9 panels per string, 10kWp...

I have been using my EVE LF280K from Fogstar UK for almost a year; I tested 4 or 5 of them when new using a Zketech-EBC40L and they were all around 278-280Ah (charging to 3.65V with 14A cut off and discharging at 40A up to 2.5V). I have been using them with a Seplos BMS, I normally charge them...

I’ve been chatting to a Seplos engineer to try and understand how to make this work, and according to what I’ve been said, this should work. I’ve placed temperature sensor 1 just above the heating pad, and temperature sensor 2 in a glass with ice Temp 2 is 3°, so it should activate heating...

I'm assembling my 16 EVE 280Ah cells and I was wondering if I need an isolator or circuit breaker between the battery pack and the inverter (Sofar ME3000SP); if anything, just to avoid sparks when I manually connect the leads...

One way it stacking the cells vertically with ~ 300 kg of weight on top to ensure a constant pressure no matter what the expansion of the cells is Obviously the bottom cell will get a higher load than the top one In my drawing one side of the battery pack (right) is constrained and the other...

I have been using my battery for almost a year with compression but with 2mm foam between cells (it's underfloor insulation, kind of polystirene). Now I've separated the cells because I'm moving them into an unheated room and I need to put heating pads below each row. Since the heating pads are...

I’ll soon be top balancing my 16 EVE 280Ah. Since I will later want to compress them (just a snug fit) when at 30%, is there any point in discharge them to 30% while still connected in parallel, then connect in series and compress? Would this make top balancing pointless? Is it better to top...

After having had a few quotes for solar panels, it seems like they are overcharging for the materials. These are the prices I can get online after a 5 minutes google search (on the right) compared to a quote I received The price of the panels are for slightly more powerful panels, in stock...

Hi all, I've been getting solar quotes from different company, but due to the high costs they charge and the non optimal orientation of my roof, it doesn't look like a viable investment. What makes more sense would be installing battery storage to use in conjunction with Octopus Go(which gives...

I’ve bought a length of 25mm2 cable and I’ve tried to crimp a connector My crimper is metric and can be set to 50/35/25/16/10/6 mm2 The connector that came with it are AWG 4/6/8 I first tried the 25mm2 cable in one of the biggest connectors (AWG 4), set the crimper to 25, crimped it and the...

Hi all, I am looking for something to charge my 14kWh diy battery during the night and discharge during the day (UK, no solar panels); I have a Seplos bms I had my eyes on a Sofar ME3000SP, I found one locally but was lost in transit I tried to look for one on Alibaba but one seller doesn’t have...

I have a 16s battery made up of EVE LF280K (the ones with the double thread on each pole) I have noticed some high resistance between terminals (including connections) of adjacent cells of up to 0.65mΩ (calculated using voltage drop at known high current) I manage to bring this down to about...

I'm trying to size the cables from the battery to the inverter. It's a 16S 280Ah; the inverter will be pulling max 65A, so I've thought of sizing the cable for 100A and use a 80A fuse. 48V, 100A, 1m, 3% voltage drop gives me a minimum of 25mm2 (AWG3) if I were to use a twin cable (the BMS...

I have a Sofar ME3000SP which I’ve so far (no pun intended) used in lithium mode with communication to the Seplos BMS. I’m trying to use it in general mode (intended for lead-acid batteries) and it has these parameters Overvoltage protection (V) Max charge voltage (V) Low voltage protection...

Hello, I was happily monitoring my Seplos BMS in Home Assistant using esphome https://github.com/syssi/esphome-seplos-bms It stopped working a few days ago showing all entities as unavailable; I spent days trying to fix it on the Home Assistant side with no success. Today I tried using Battery...

I just bought this rack which fits the space I have available; is there any problem in having a cable going from the top to the bottom shelf for a 16s connection?

I plan to buy 16 280Ah LiFePo4 cells to build a ~14kWh battery with BMS from basengreen.com I won’t have solar for the moment as I’ll just buy cheap energy overnight, but I want to future proof for solar (I have space for 10 panels, so around 4kW) I was thinking about the Growatt SPH3600, which...

I have found some solar panels on ebay, Trina 540W for £80 (offers accepted) The seller says they are solid on the front, cracked on the rear but 100% working. Is this a good buy?

I’ve been using the Seplos BMS 10E for almost one year and I’m moving the battery to a non heated room, so I want to use the heating pads that I bought with the BMS to make sure the temperature doesn’t drop too much. In this video they are placing the temperature sensors between the pads and...

I have a Seplos BMS 100A, new version 10E This bms considers 100% when the single cell overvoltage protection or the total voltage overvoltage protection is triggered I have these set to 3.5V and 56V respectively Today I started charging when I was at 80% at 50A; after 1 hour the voltage was...

What is an off-grid inverter? For regulatory reasons, I need an inverter that cannot export energy to the grid I think I have a general idea of what an off-grid inverter does, but correct me if I’m wrong: it’s connected in series between the grid and all of my loads (it has an AC in and an AC...

I want to design and install a 12kW system at my parents' place; the solar panels would be on the ground as there is a field with plenty of space and also to avoid having to work on a roof (which is also not too big and has a chimney). I worked out a 12kW system with 15kWh storage to be the...

I’ve just received this BMS, however it only has two connectors for B- and two for C- The shop and the manual pictures show 3 of each Is this an issue?

Hi all, I just bought Sofar ME3000SP 16x EVE 280Ah JBD bms from the same shop I bought the cells from I still haven’t tried but I think (from what I read) that my BMS doesn’t communicate with the Sofar (it doesn’t even have a rs485 port), so I was thinking of returning the BMS and buying...

I just charged my battery and I'm having the Seplos BMS keeping it at 56V to balance it. You can see the on/off state of the active balancer (turns on at 55.2V); the voltage differential is increasing instead of decreasing. The balancer is this one...

Can someone explain why this setting is set to 63V? What’s the purpose of it? I’ve seen videos where people don’t change it so I guess it’s fine, but why? That’s 3.93V per cell if they are all balanced!

Has anyone bought basengreen product from their UK warehouse? They currently have Lishen 280Ah for 145$