Most reacted posts

It's 120W. On a 12V system it's 10 Amps. If it spikes to twice that it will be for a millisecond maybe, it'll be fine. You are correct that a AC->DC power supply will be current limited and it's output DC voltage will drop if inrush current exceeds its rating. The battery will do that same...

Fair enough. I poll everything at 5 seconds. Zigbee sensors are told to report at most every 5 seconds, at least every minute. For "push" sensors like zigbee and most MQTT sources I store whatever rate they send. Obviously if you do this you need to become close friends with the reduction...

24V MPPT, 24V Inverter, 2x12V batteries in series. That's fine. What do you need the 12V for? Make the "system voltage" 24V. If you have mild to moderate 12V loads, use a DC converter. If you have heavy 12V loads, you might consider something else. Like running a DC power supply off the...

Funny enough I ran my drier yesterday and yes that was a total waste as it was sunny and breezy. But I'm a lazy batchelor. It ran off the grid too! The thing stands out on energy charts like a skysraper blotting my beautiful landscape of energy saving efforts. I have even avoid the electric...

I think I intended the MIT license. The original messy repo is MIT I believe. The new tidier repo is unlicensed I think. I don't recall applying one in gitlab for it. So basically public domain. It's a "one man band project", just my ideas and efforts over the past 6 years or so. Many of...

Was watching a bunch of folks restoring old machinery. Even trains and bull dozers. People think battery tech and running stuff on DC is a new thing. As Sheryl Bassey was famous for singing... it's all just a little bit of history repeating. The first powered cars where DC battery. The...

Where? The maximum allowable is 4.20V. That is the chemistry limit. The only reason manufacturers specify 3.650V is because there is no point going for the 4.20V for the final percentage or two and risking damage by going over 4.2V Ah is not an energy unit. Nor it is a capacity unit...

A technique I have seen on some BMS's (NEEEY maybe) is a secondary charge circuit. A true balance charger has the balancer and cell monitor built into the feedback loop which limits the current to keep the high cells within limits while the low cells continue to charge. It's very, very, very...

I can see I'm the unwelcome fool here. I know what to do.

Also. The solution is not to constantly "slow charge" to top balance. The solution is to capacity balance the cells with shims or by paralleling them into equal pairs. Apart from the fact they are turning into hens teeth, I want to get a few dozen small cylindrical cells which can be used to...

https://powerni.co.uk/renewables/microgeneration/tariff-rates/

Being an IT guy I started writing things before Home Assistant was a thing. I have it and it's partly integrated. I use it most for controlling the lights. I keep it somewhat at arms length, a silent partner so to speak. Lately I was looking at integrating to their new "Energy Dashboard"...

Forgot why I replied in teh first place. For humidity control with pipes, have you seen this:

Redacted

Maybe in another thread I'll let you see how I automate things, including heating. Actually lights is my weakness in the current system. Been on the list to design something, but instead I just "jury rig" new lights in permanently temporary.

Also on fire supression topics. The area in my garage (out building) where I have my solar setup and batteries ... the wall and floor are coated in white powder from the last owner. If you try and brush it off it creates clouds of grey/white dust. I have come to the opinion that is the result...

Sorry for mixing units around I was trying to simplify things without converting between panel voltage and battery voltage for each. 1000W into a 24V LFP can result in 1000/24=40 ish amps. If it's empty. The battery datasheets is unfindable and probably in Chinese. The sales listing states a...

Also of interest, and of note. MCB's are often thermally operated. They have a minimum voltage rating for that reason. No matter how hard I tried I could not break the 16A breaker with 20A of current with a 185W max load. I couldn't get more than 11V through it. Things are now clicking and...

The GPS port I believe is a 4 pin MicroJST. Be warned it's extremely fragile. The GPS port does not provide USB, it provides either CAN or RS845. it's not a standard protocol but a custom botch over ModBusTCP. This is why i liked that BT worked. that leaves teh GPS port free for teh battery...

In other fires in my life. When I was 6 the valve on a gas heater failed after install. It leaked half a bottle of propane into the house overnight. My mum let me light the heater that morning, but it wouldn't light for me. My mum tried. In a loud WHOMP! my mum disappeared in a cloud of...

As long as the price is right and they are brand new B grade cells, I'll take em.

Are you measuring with a HiZ meter ... do you have one with a LoZ mode?

Oh dear. Not to be beaten I tried again to break the 16A breaker. I connected my biggest bench supply to it, set to about it's limit of 24V and 20A. Then I put a metal file across the output of the breaker. Sparks and all. What happened? The file got hot and nothing else. The current...

I don't mind debates and I don't mind heated debates. Where I draw the line is when the kicks start, names get thrown and the defamation starts. Especially when the other person has to come in and give a little kick when they are done and calling me a fool. I have redacted any valuable...

Sorry... another factor which is raising it's head more and more often is loss of revenue from "fuel duty" for vehicles etc. I believe in Spain, one of the sunniest places on earth, the government has started taxing solar generation for this reason. It has taken far too much away from their...

A little more "out there" and "yeah right, this is a capitalist country, will never happen". If the electrical distribution operators produced reports on the "area" consumption versus "area" meter readings the the differential could be used to reduce everyone in that areas bill by that ratio...

That's true. However they are far, far more influential at night taking money away from the grid. Also, I think for the vast majority of people outside of Spain and California, you absolutely will 100% want the grid to be there when the battery is flat and it's raining in January. Having not...

The only grafana config I have is the JSON model export. Grafana is usually the easy part and how you build you graphs is part of the customisation and fun! I haven't gone as far as to create an exportable dashboard or anything. I haven't used the MQTT plug in. It looks like it only allows...

I missed this sorry. I hope to run an extension socket in the office. So it will be running about 200W of monitors, laptops, the usual office stuff. Anything which can be switched off freely, runs from a single plug socket. It's that socket which I want to make "occasionally" solar. If...

Well, I have data. I just never set it up to look at efficiency. For example, here is the last 24 hours "Power factor for the inverted circuit" and the same graph with the rest of the grid mains outlets for comparison. The "red" is the overall "main tails" for the house consumer unit. I...