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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...

Epic! To give Scott some support in the janky side. Here is my "make it nice" attempt on my system! However... while it looks ok ish, zooming out reveals the temporary jank. The AC side is not janked though. On WAGOs... do you like my garage 24VDC lights?

I promise this is the last off topic, (although, technically. It IS literally DIY solar powered flight.) ... but regarding "the bliss". This is the first flight I broke 5,000ft. The first flight over an hour. The first flight where I was shadowing, following or being followed by vultures...

I flew a paraglider for a few years. No formal training required, although I got, no formal license or insurance, just a voluntary membership to the BHPA. It's basically solar power flight. You walk to the top of a mild hill facing the wind on a sunny day and wait on a little thermic cycle...

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...

Yea, I had an MPPT 75/15 with 20A of panels on it. It was right and toasty. Probably 45*C on the surface. So much heat it was actually causing the 10AWG cable AND MCB's to get warm to the touch. I got another today, so they are each running only one 10A panel each and limited to 8A battery...

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%...

It's a good point. I suppose this would be the better option: https://uk.rs-online.com/web/p/speciality-size-rechargeable-batteries/8183005

I'm going to make some assumptions about you. 1. You have never been poor. I'll summarise your post as, "The opportunities to make money are there for all, so if they haven't done it, they are obviously stupid or lazy". Most people see prosperity and opportunity as being directly linked...

I am not talking about trying to achieve energy "equity" by false incentive. I'm talking about a charity scheme or regulation that prevents the double win on one side and the double lose on the other. In terms of myself, I am happy using what I can generate, if I end up with excess that I...

Thank you. Makes sense. More sense than half the "parrots" scare crowing about it without explanation or qualifiers. I too figured it was a a bit of "better safe than sorry" and if you can avoid it entirely, why not? I researched elsewhere too and on this particular topic, it seems even the...

Absolutely. Especially focusing on the later. In fact I tend towards only the later. When I went through some architectural design for this, I kept finding "state machines". State machines and concurrency is a recipe which will make me sit up and listen in work as it's either a bad, bad idea...

Let me explain where I am right now and how I got here, which may explain some of my tone and I agree it may be out of place. I've been using and abusing batteries since I was a child. I'm 48. I set fire to my first lipo cell in 2007, thankfully outdoors in a speed controller fault. I nearly...

I suppose one could measure the VoC of their cells. However, that could be subject to age, cycles and temperature and will probably change based on how well "fed" it was on it's last charge. I am running a "pigeon" experiment. Not hoping to show anything but for my own quick eye balling I...

The idea that local solar gets used locally is only true when there is demand for it. The largest consumers by and far are industry and industry place their plants as close to the power plants as possible. For many reasons, not least the lower cost of transmission and distribution, but also in...

While this sounds good it has a few practical issues outside of an ideal setup. 27.6V is enough to top of charge at 3.450V yes, but it's not enough to leverage the balancer and come anywhere near solving top of charge imbalances. If all cells are at 3.450V you can call them charged, but I...

Interesting. I have a fire blanket in my kitchen and an oil fire is it's primary use case. I have extinguished a well established "chip pan" fire. I started it. I put it out. I left my dinner in the chip pan on medium and went to watch TV. Some time later I seen what I immediately...

REST API with micro-services is a valid approach. Along with RMI (Remote method invocation). The advantages of using "middleware" like a message bus (MQTT) is that services do not need to know of each other's existence, nor do they need to "discover" them. In a traditional, non-message bus...

A hypothetical synchronous operation, a REQUEST->RESPONSE call using a message bus is not 'that' difficult. Publish the request to a specific topic with a specific request ID. Store this request in the service state. Subscribe to the response topic and filter until you get a payload with your...

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...

Well, asides having to ream out a few bus bars and make the "fold series link" to join the two halves, it all went well. Luckily the old 8 were nearly flat when I swapped to the new 8. The new 8 were almost flat when I rebuilt the new combined pack. I tested each pair delta before I dropped...

Back on topic. https://snapshots.raintank.io/dashboard/snapshot/sbogXt8ekM39c4v0kOJEgzGxgMNaUKYb?orgId=2&refresh=5s A graphana dashboard for "today." Summary, working exactly as intended, and F'ing epic. Tomorrow is to be better! The front garden need strimed down, the inverter will run the...

That is maybe true, but I really doubt it will get that far. If the people don't do something, governments and large companies will. History shows the least fortunate end up with the worst outcomes until regulation steps in. I have seen many think tank reports and most of them will be coming...

Start with the basic "ITTT". If this then that. Subscribe to an MQTT topic of choice. Write an on_message() handler for it. Run blocking. In the on_message() send another message to a device to do something. Lights in the most simple sense are a motion sensor on MQTT. You subscribe to that...

I believe that most consumers in the west pay by "unit consumption" of "real power". They get paid by unit generation. A lot of people might be unaware of how electricity is wholesaled. It isn't by consumption and surprisingly the grid has virtually no idea about consumption, it is far, far...

Adding... Always consider "idempotency". It's a fancy term for saying repeated requests should have no additional effect.(many caveats). If a light needs to be ON. There should be no concern sending it an ON if it already is on. The output state satisfies the requirement. If the light is...

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...

Interesting take. The boss in our work opened several initiatives for "corporate responsibility" and internal company communities taking ownership. Two of those initiative are energy (aka renewables and saving of) and communities. I figured combining the two into Energy Communities and using...