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Question on behalf of a friend, one that I don't have the answer to, one grid tied Solis 6kW hybrid inverter, connected to 32kWh of DIY LFP 48v with a seplos 200amp BMS with can coms all working, if they were to introduce a secondary charger (non PV) that outputs a constant 750Watts from a water...

I have held off naming and shaming as I have been an advocate of this suppliers products for some time and actively supported their UK buyers despite not being affiliated with them at all. As some of you may know, I purchased four of their 280ah cells cases including BMS which they shipped but...

I installed 16x Basen 280AH cells for a friend along with a seplos BMS a month ago. All has been working well and has been through roughly 25 cycles top end 3.4v cut off bottom end 3v cut off Yesterday I noticed the BMS showing a fault on cell 1, the lead positive to the BMS / Inverter and the...

Hi, thought id try out these active balancers people have been discussing. I have connected up the balance unit to a spare purposely unbalanced 16s 280ah LFP pack and it doesn't appear to be working at all, the run light comes on, on the connectors measure fine with a multi meter but it doesn't...

Hi all I have a diode gone on my BMS that I can't seem to identify from its casing markings, the supplier has shipped me replacements from China but they are taking too long to get here and need to get my BMS back online. It appears to be a 110v zener diode SMD, but my usual decoding for SMD...

Not to start a mines bigger than yours exercise, but I'm interested in who has built the largest DiY LiFepO4 battery bank. I have just upgraded mine today to 4p16s 280Ah (53kWh) pack to combat the dark UK winter and short days but large solar array. Interested in what you all have.

A supplier I have been talking to has just offered me these, the old saying, too good to be true. However they are huge in size, 385mm high x 330mm wide x 80mm deep Whats peoples thoughts?

Hi all I have a Solax boost 3.6kW inverter, dual mppt trackers with oversized 14x350watt sunpower (4.97kw) PV all in one orientation currently in a single string to one mppt input. This is a matched kit supplied by a well known UK company btw. Is it best to use both mppt inputs and split the...

What have others done on their BMS leads to cells? Do you solder or crimp? I've read mixed feedback that soldering adds unnecessary resistance for the mV readings we need, despite a decent wet solder connection. Others have said that crimping allows for potential corrosion to form. Feedback...

Thought id give something back to the community. Not sure if its been done before, I didn't see it here, but I have managed to decode the data from a wide variety of PV inverters, Grid tie, storage etc, written a python script that outputs to influxdb then you can read off in to grafana or...

As you may have seen in my battery thread, I have been under the impression that my new EVE cells are appearing to charge themselves when in standby with no load connected or discharge applied making the pack delta v out. I have 2x Chargery BMS 16t and both show exactly the same issue on the...

Ive started construction of my 16s2p 280ah LFP pack. I have balanced them as per Wills video at 3.65v until the current dropped off to near zero. All cell voltages are the same on the chargery BMS but I have a concern over the IR Is this within spec for new cells under a 9amp load?

Today my delivery of 32x 280ah LFP cells arrived from Senbry, these were listed as brand new EVE cells, he was a seller on here but has since been banned for advertising at every opportunity as fas as i know. I paid $70 per cell plus $4 per Kilo shipping by train. total was just under $3100...

I have 36x280AH cells that will be in a 16s2p 48v configuration, these are brand new. I have oversized my requirements so that I can safely stay between 20% - 80% charge range to maximise their lifespan,. Just wanted to get an idea of what others were using for max and minimum charge voltages...

Thought some of you might like a look at the bench supply I purchased to balance my Lifepo4, nice colour display and only $60 / £55 Its app and PC controllable which means you can monitor remotely, has built in wifi and has battery temperature probes and provides graphing and data logging...

As you may have seen from my other post, I have just ordered 22kW of PV being fitted to my roof by a National energy company in the UK They are providing all the PV install, optimisers and grid tie inverter etc Their price for battery storage however was extortionate to say the least so have...

Thanks to the help from @tictag @MisterSandals and many other members with my initial DIY 1.5kW install I have decided to go full roof PV. I have sold on my initial equipment and hybrid inverter and invested in 22kW of roof mounted LG all black panels, solar optimisers and 10kw solis grid tie...

I have purchased 2x brand new 12v Yuasa L36-AGM 95AH AGM batteries in series while I await the delivery of my Lifepo4 cells from China, my old SLA freebie batteries have given up the ghost but i need to maintain my solar while my new batteries are in transit. Linky to battery >>...

My hybrid inverter is rated for a mac VOC of 102v but i'm currently at 68VOC 3s4p Do you get better performance nearing the max VOC for PV input or somwhere in the middle?

HI all I have been offered 15x S-energy 300watt sn300p-10 poly panels, two years old for £975 / $1,182 Firstly does this sound a decent price and do people still by poly panels over mono? Any input appreciated.

Can anyone explain why i see draw down on my battery bank but yet I'm producing sufficient solar to cover my requirements. As you can see my overall load is 416 watts with 429 coming from PV I presume overheads make up the additional 13 watts difference but yet the battery indicator shows I'm...

Hi all I purchased the bellow unit two days ago and it doesn't appear to function correctly, when switching priority to solar only it goes straight to battery mode, the only way I can get it to use any PV power is to switch the inverter off on the main side power button and it starts to charge...

I have a strange issue that I cant quite put my finger on, batteries are around six weeks old, 3x100Ah SLA in parallel, with a magic eye to check supposed charge status initially I had the scc and inverter load connected to one of the batteries at the end of parallel connection until I read...

Hi everyone. I decided to make my home bar/pub off grid with Solar, inverter and batteries. I didnt want to spend fortunes as my power requirements are minimal, around 370watts with the LED lights on, fridge running and sonos running when its active, during no activity, only the fridge is...