Testing the battery pack with the JK BMS. My 60V power supply tops out at 5.1A, which is fine for this basic test. I'm not exactly happy with the included buss bars, and gosh, the screws that are supposed to hold everything together are much less substantial than I expected. But, for the first test, it's fine. Everything is working exactly as expected. At these low C charge rates, the cells are all showing very low deviation, though, I do expect that to change when I set the system up for higher charging rates after the battery is put together "correctly."

#solar #grownostr #diy #lifepo4 #jkbms #battery #offgrid

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GM #nostr

I’ve a question 4 you. Suppose I want to start mining. How much bandwidth might I need? More importantly, what can I buy with a good Q/P ratio to get started?

#mining #asknostr #Btc #bitcoin #zap #lightning

Mostly just worried about messing up my miner if I use a transformer… any insight?

#Mining #BitcoinMining nostr:note1f0mglusc0py8lqce5nz0rjmjd0p0y268kc3gyumuusdfpl4j2z7s779rcy

Thanks Crow!

Direct to the load, but I do have a number of battery packs I can charge off this system.

Solar-mppt-battery-load was my earlier setup. It gained a couple of percent in efficiency, at the cost of greater complexity and multiple single points of failure.

I learned that the first thing I needed to do when designing an intermittent power system is to kill the Little Tin God (efficiency) and bury him in the foundations.

Solar panels are very cheap, single points of failure are very expensive.

XT60s I shall investigate, thanks for the tip :-)

My gassifacation projects have only been at the “hobbyist” level. I like the adage “if you have one, you have none, if you have two it will get you through, if you have three… it’s a guarantee.”

I’ve only run a 45cc gas motor off of a 5 gallon bucket gassifacation system. I suppose I could run a dc treadmill motor “backwards” to charge a battery. But I haven’t tried it yet.

I run solar power with a battery backup as my main power source. I can charge from the grid if I need to. That’s one and two. I have a gasoline generator and stockpile of fuel for. That’s three.

My “someday” goal is to scale a gassifacation system to charge my batteries.

All that being said, wind and hydro power require less maintenance than gassifacation. AND, generally speaking, wind and hydropower happen when solar is less abundant. I have a “seasonal creek” in which I plan on testing a small scale hydro generator during my rainy season. I also have an old car alternator that I plan on putting a turbine on to charge batteries with that I haven’t gotten to yet.

Gassifacation is dirty power that requires a lot of maintenance. It’s for nerds like me that like to experiment with. If you’re a nerd I’d like to talk more about it. However, there are many more economical options to create a third tier backup system.

We are still 3 weeks away from winter solstice. Today I brought in 20 kWh -- mostly from the vertical panels. We live at 56 degrees north. I am all charged (40 kWh) of storage. We use a minimum of 10 kWh per day. In the past we have had 1 meter of snow.

The vertical panels help a lot.

Offgrid Solar - distributed DC microgrid

So I was writing this as a reply to The_Beave in his offgrid thread, but realised it should probably be its own thing.

Here, I can literally go to jail for working on anything over 40v without doing a long apprenticeship first (or paying someone who has, to pretend they did the work). It almost never happens - unless someone doesn't like your politics, or a scapegoat is needed.

So while SWIM may or may not have wired up 415v 3-phase industrial machinery perfectly safely at work (where if work gets raided he can adopt a blank look and claim he doesn't know how that came to be :-p), he's not going to do that where he sleeps.

Government-subsidised solar systems here are exclusively the grid-tied kind. Grid goes down, they go down. And fairly overpriced because of the expense and bother of maintaining certification to qualify for those subsidies.

So I've started experimenting with essentially the opposite architecture to The_Beave's - building a multiple-source, multiple-load DC microgrid. The idea is to keep it legal but offload some usage to solar, both to save $$$ and to have a backup for when our grid starts failing harder. And it will keep working even if some components fail (always right at the worst possible time).

What I've done so far that works:

Sources:

- 24v 250W nominal solar panel x 4

- 24v 5A AC-to-DC power supply

Infrastructure:

- 10A and 20A twin-core DC cabling

- Rail-mounted DC circuit breakers for each source (safety first!)

- portable capacitor bank ( 6 x 4.7 uF) with three automotive sockets for inputs and outputs (this allows electric motors to spin up without the voltage sagging to zero).

- multi-socket junction boxes with internal shared busses, designed to take cables with automotive plugs. I mod the plugs with 20A ceramic fuses.

Loads:

- many DeWalt power tools, the older style with minimum electronics, modded with automotive sockets where the batteries once slotted in.

- evaporative airconditioner, all original electronics removed, 24v nominal electric gear motor now driving the fan and a 24v peristaltic pump moving the water.

- seat heaters, resistive, automotive kind

- Fans, 24v nominal, computer kind but larger

- 19v 5A step-down transformer: charges laptops and 20v nominal battery packs if the cases are opened.

- camping 12v stuff - kettle, ministove, air pumps

- automotive USB chargers, many of these, working well.

- 12v dc-to-dc power supply, runs led lighting in my shed.

Things planned:

- huge old 24v camping fridge (going to need a bigger capacitor bank!)

- little 2kg mains-voltage washing machine I purchased to convert. Going in my under-construction offgrid container cabin.

- little 24v truck air conditioner, also for cabin.

- DC ATX power supply for a desktop computer. Looks underpowered and under-filtered, previous one blew up. Going to mod it with stepped-down input and possibly a secondary 12v supply.

A friend is adamant I should have converted all the automotive plugs and sockets to Andersons.

Your thoughts?

#diy #solar #offgrid #prepping

I haven’t built large scale one yet but I have studied gassifacation extensively for several years, running model engines off of 5 gallon steel buckets and plan on building a large scale one in the next 12 months. The main problem with gassifacation is the tar buildup. The tar resulting from the gasification process requires more frequent cleaning, and maintenance of components, such as the carburetor and changing of the engine oil. The “drizzler” method somewhat removes the tar problem, preheating the fuel elements,

running through the upper portion of the combustion chamber before actually igniting them. However, the effort involved in the required maintenance lowers your return on investment to a point where it is unfeasible.

All that being said, solar/battery systems are a much more cost-effective way to mine bitcoin. Even in northern climates. Especially if you have the skills to install your own system. Trust me, if you have the skills to build a gasification system, you have more than enough skills to do some basic wiring. I recommend contacting Shawn at hackmyhomestead.com.

Shawn designed my solar system and recommended suppliers that saved me approximately 70% compared to a commercially installed system.

Don’t get me wrong, I’m not giving up on gasification as a way to mine free bitcoin! However, the research and development hasn’t happened yet. Gasification is in the hands of a few techie nerds like me who understand that burning wood is a carbon neutral, renewable resource for generating electricity. Although solar is ultimately a polluting technology, it’s backed by big business and government so that makes it cheaper for us to run today.

#gassifacation #solar #hackmyhomestead #shawnmills

#permies

Solar peeps out there:

I have a section of roof that will take 9 panels. The 3 at the end are shaded by trees more than the other 6 til the late afternoon.

Should I run them separately as a string of 3 in series and the other 6 in series, then parallel those with branch connectors?

Just do the 9 together and accept the overall loss while those 3 are shaded? Or something that I’m not thinking of?

There are 3 other sections of roof that are more straight forward with 6-9 panels per string. They’ll all meet in a combiner box and run to (2) 6500w Inverter/charge controllers if that makes any difference. Thanks for any help!

#grownostr #solar #asknostr

Come on maaaaan. Give me a sign in with NSEC

So my 2 sats/vb transaction, that’s been gone since 2 weeks, will not go through? Ok. It’s hilarious to see it cross 550sats/vb. How high will it go, 1k sats?

The past 20 years of bank failures. Nothing will stop the domino’s this time.

#Bitcoin #Nostr

#[2]​ #[3]​ #[4]​ #[5]​ #[6]​ #[7]​ #[8]​ #[9]​

If more people are using bitcoin for their brc-20 shitcoins and ordinal astrology why is the price not going up along with fees? Aren’t more people buying bitcoin to use it?

Yes we can not stop it, nor should we. But are you as exited about a future with a bitcoin blockhains full of rich people's jpegs as opposed to a future with a blockchain full off developing world people's channel open and close transactions?

To me it higligt that bitcoins utility is threatened by global inequality.

Mindfulness test: Which cup of coffee will pour faster?

#nostr #nostrich #nostriches #nostrichs #amethyst #plebs #pleb #plebchain #coffee #coffeechain

I love the idea of mining! I’m struggling the make the math work though.

Spend $23k to buy 3 S19 XP machines, install electrical, and install infrastructure (not factoring in solar and building). Say it’s $0.02 kWh because of solar. After three years, I end up with 0.64 BTC

I could take that $23k and buy 0.77 BTC right now.

Buy equipment, work on the miners for three years, and end up with less BTC. What am I missing?

Thought about buying a 100watt solarpanal and some powerbanks to geht the pis going

It's not only screwing up my Monero mining plans. After i got deeper into the whole „energyconsumtion <> price“ topic Iit made me question my entire life here in Germany. #deutschland #bestesdeutschlandallerzeiten #germany #monero #bitcoin #mining #energy #costsofliving #wtf

Hooked to the grid. Sell excess power wholesale for about $0.04/kWh.