Angyl Eternity

Gray Henon wrote:Are you using the heat generated for another purpose, such as heating your house?  Stacking functions and all…

I’m trying to convince a friend to only mine in the winter and to place his rig in a central location in his house to offset his HVAC use.

Grey,

They could hatch a whole Lotta eggs!

Square Trade invest $5 million into solar crypto mining
Bloomberg Square Trade Article

Thank you whoever you are for my first apple!!

Hello Permies!

Just a quick note on battery health and how to avoid costly replacement by utilizing a very powerful circuit gadget!

The low Voltage disconnect can really save your power bank form catastrophic failure which can even ruin solar charge controllers or solar panels and inverters if not noticed in time!

As we know most batteries are 12vdc , yes I know about the 6vdc Trojan golf cart batteries but let's stay focused lol

where were we , oh yes, 12v batteries!

depending on the chemistry of the battery,  for this example we will use a Flooded or Lead Acid battery most commonly found in your vehicle. these batteries are used to start the vehical and once it's started the alternator charges the battery as well as provides power to the vehicals electrical needs.

please note:
These batteries are charging constantly at 13.8vdc to 14.5 or even higher if the batteries were very low in charge!
Once your Vehical is switched off, the battery voltages will fall to whatever the cell rest at, ideally 12.6vdc or higher

You can load test your batteries to know as to how they will respond under a load however these testing instruments differ from battery chemistry and loading a solar AGM battery with a max 30Amp output with a load tester from a 1000+ CCA Flooded Battery you risk both the test equipment and the battery as it's not rated for those amperage.

If a Flooded We Lead Acid battery's voltage is taken too low, the cores or metal plates inside the batter can become corrupted and or fail completely.  This is where the low voltage disconnect comes in to save the day!

Should you leave a fan on or transfer pump whatever is POWER SUCKING your circuit,  have no fear, you can set a voltage on the device, this is done with some wiring and whatnot with the inverter, for example, and now you have a circuit that will break the connection from the battery to that inverter once the core voltage is lower than the value you specified.  

so let's say instead of 11.9vdc we wanted out 2000watt inverter to disconnect at a higher voltage like, 12.2vdc or 12.4vdc
Why would this mater? well maybe you know that once the voltage is too low, that large inverter is connected to heavier power consumption devices just won't work and "trying" to use them with low power could again ruin the electrical component in either the inverter or whatever the device is you wish to power.

In conclusion for the sake of a $30-60 component that could keep your batteries fresh as the day you sawed off the arm and leg to buy them, it's worth it!  hope it helps keep your lights shining brighter!

4 Eternity

Solar Angyl 143

Gray Henon wrote:Are you using the heat generated for another purpose, such as heating your house?  Stacking functions and all…

I’m trying to convince a friend to only mine in the winter and to place his rig in a central location in his house to offset his HVAC use.

The thought had crossed my mind, lol but all my rigs are setup for low power algorithms kinda designed to combat the "once was Ethereum GPU mining epidemic "

Take into consideration the energy needed for Bitcoin its more of a full-time commitment then say, Litecoin which stays afloat amidst the many storms!

Thanks for getting back to me!

(" if it's warm enough, maybe it can hatch some eggs!")

Michael Qulek wrote:The list was easy till you got to "refrigerator".  A refrigerator in general bumps up the system size from small, 12V, to a medium 24V.  I don't think a Bluetti is going to handle that, irregardless of what the ads may say.  Forget about the hot plate completely.  It is NOT going to work on either a small or a medium sized system.  Get yourself a little Coleman propane powered camping stove for that.  I used one plumbed to a 5 gallon barbeque tank for years before finally upgrading to a standard gas stove.

First, you need to understand the concept of the sunhour (sh) which is NOT the amount of daylight you have.  It's a conversion factor for changing watts of panels into kWh of solar power.  Lets say you get 2 sh in winter (clear sunny day) and 5 sh in summer.  We'll use those numbers in the math to come.

So, what is this going to cost....
six panels 400$
50A charge controller 250$
four 6V batteries 400$
HF inverter 650$
1700$  
Buy some steel to make a nice array frame, sink it in concrete, and wire it all up.  Add another 300$ for steel concrete mix, and good copper wire.  Call it 2000$ total.  Price goes up though as the size and quality goes up.  Factor that in proportionally.

I like how you started with compassion of 12 and 24 volt systems.   I went 24 volt a few years back and what a difference! I only had 1kW up there but I saw 6.5kWh collected on most days in the summer and that panel array is mounted flat too so not exactly the right angle!  
Keep up the great work and good advice!

My favorite aspect of solar is its totally scalable and expandable!
( also Solar coffee just taste like, freedom!? lol)

Runing the Outback Solar FlexMax60 MPPT Solar Charge Controller and Giandel 24v 2000w inverters!
2 x Renogy AGM 200aH make up a 24vdc bank

DIY

Solar Panel Combiner Box

I found this post to be very interesting! I have helped setup a few HAMs and GMRS radio operators with solar solutions as well as advice on batteries and inverters.  I also climb the towers!

Yeah I've been mining ⛏️ Crypto for over a year on solar and was wondering if anyone was doin that and wanted to chat about it!

Microwave Internet WISP on the corner of my 2002 CNG BlueBird Charter Bus project!