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Apologies for temporarily removing this for a period. I found a few mistakes, too many, decided to pull it and redo. Aim: DATA! The JK-BMS provides numerical data output for all the various voltages, currents etc. This data is easiest accessed via BLE. (Bluetooth). The aim is to get the...

So I have 8 new cells. I intend to parallel them with the existing 8. Some of that 8 are lower capacity and some higher, maybe a few Ah! It would be wise to pair the lower cells with their higher counterpart. So I did this to the new cells. The peak charge was initially assisted by the...

It's sort of a "dream come true" scenario this. My first solar adventure charged my phone 9 out of 12 months of the year. Back then I had ideals of running a 24/7 server on solar and realising how far away my little 50W 12V setup was from that. Fast forward 5 years and about £2000 and I have...

This isn't normal. It's Ireland! Our weather is internationally renowned for being "sh1t". This year I went from charging my phone to the below. At 42p per kilowatt hour this actually has an effect. That is close to 50/50 fuel mix house wide. With the UK grid fuel mix already only ~35%...

Not sure if anyone has seen "Technology Connections" on YouTube. He voiced a concern about "roof top" solar going forward which I personally had not considered much. Basically his point, if I may butcher it a bit, is... The electrical grid needs to exist. Without it normal roof-top solar...

With the weather we get here (Northern Ireland) bottom end testing a solar storage system is easy. Today/Tomorrow I should get some top end testing done. This was my first bottom end test of the 4S 105Ah LFP (Varicore) cells. It's "as is". Open to interpretation. I'll give mine, but I...

... my automatic lights are coming on all day. How does this relate to solar? The interior lights determine if it's daylight or not by asking the solar power system what it thinks. The weather is so **** the solar power system isn't quite sure. LOL Some times the upstairs hallway lights come...

Scenario: I have a 48V 10 Amp DC power supply. Connected to it are two DC/DC converter electronics bench supplies. These are CC/CV units. One of the PSUs is outputing 19.50V and is powering a laptop docking station setup. The other is outputting 12.50V and is running 2 USB hubs (charger...

Frankenstein mode engaged! That's a Sonoff SV Wifi switch configured in isolated dry contact mode, powered from the B- B+ via a 24V regulator. I think it needs a fuse as it's going to be directly connected across the battery. It could be doing with being tidier!

Thought I'd share this. It's a cold front day with powerful down pours mixed with powerful sun and cloud reflections. "Battery Power/Panel Volts" = EPEver. MPPT2 / MPPT3 = Victron's. Panels: Craigsolar 330W 41VoC. 1 panel per MPPT. All 3 mounted in one row side by side. In the order...

I finished version 3 of my solar system at the weekend. Or rather I finished the main bulk of the board. (330W panel, 40A EPEver MPPT, Multiplus 24/800). I'm left to figure out the "auxiliary" stuff. The first part of the auxiliary stuff is what I like to call the "maintenance bus". This...

I was looking at moving the house network server to the garage to make use of the new Multiplus's current single plug. It remains a single plug until the spark does the AC install side for me. I believe that is the safety requirement, understanding it has no earth in the event of a grade...

I have one 330W panel. I ordered another 2. My 100Ah battery will not take.... rather, I do not want to throw all 1000W at it. Similarly I can't increase the load side too much to reduce the amount of "excess solar" going to the battery because the moment the sun goes back in behind the...

tldr; "Permanently temporary, lean-to awning, roofed with solar, is it wise? Any guides, useful references?" Last year I built my first DIY off-grid system and it has generated close to 0.5MWh of off grid power to my single office circuit. Garage roof: 3x330W panels. 3xMPPT controllers...

"Shim-cells". Small cells used in parallel to match a cells capacity with peers. I have a lower capacity cell. It's the first down and the first up and over voltage. It actually seems quite difficult and quite expensive to buy small cylindrical LFP cells. I do have a "clatter" of LiIon...

So I have an empty MQTT controller subscribed to the battery "max_cell" and "cell_delta" and ability to publish charge limits for 2 out of 3 MPPTs. (The other doesn't matter as I can take it out of picture before "top of charge"). I managed to get that far without even thinking once of the...

Been a while in the making but I have all the ducks lined up now and nothing stopping me but getting it done and done right. DNO stipulations. I can run the battery/inverter system without notification under G98/NI if I do not hardwire connect it in anyway to my "private LV network". If it...

When they doubled the price of electric here last year, I went off on a campaign to use as little as possible. I changed the cooker hob to offgrid gas bottles. I bought a low power PC for the office. I monitored and automated the switching off of media centres and other standby power...

I'm looking for small LifePo4 cells, 18650s of 26650s or whatever. RS Online sells them, however they won't sell them to "members of the general public" due to UK or possibly EU laws which treat the public as idiots, which these days is pretty accurate. I can find a bunch of sellers on ebay...

The subject is a lead acid. The first photo is my trusted BM235 with 3 el-cheapos. Second is an android split screen with the Rudeng charger output (and controls) the bottom is the Aneng9002 voltage meter on the battery. Sofa charging.

Part of the work (hobby horse) I am doing with my DIY lithium system involves testing the "top and bottom end" responses of the system as a whole. Questions are basically: In the setup, what happens at the top of charge with the sun fully on the panel? Also. What "should" or "should not"...

Hi, I am looking for data showing the effective insolation for any (well, one) given area. Windy.com provide a visualisation of this data: The source data appears locked behind a pay wall with a fair price too, IIRC. Very often the data they use comes from a public or open source in raw...