This $600 SEPTIC TANK Holds 16 Powerwalls of Energy Underground (No $10,000 Battery NEEDED!!)

Comments · 82

• GR

  @griffithselijah7018 · 2 weeks ago · pinned

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  1

• AR

  @arthurbrown9751 · 2 weeks ago

  I have designed this system in LaGrange Ga. 30 years ago. You can use it for cooling with an absorption system. We used a steel surplus LNG tank and a non-toxic petroleum based heating fluid for the storage which reached 400F+. &nbsp;We fabricated Solar collectors from steel pipe routed through salvaged florescent light fixture reflectors. Dip heaters in the tank supplied heating and domestic hot water throughout the 4000 SF dwelling. and yes I am a licensed professional engineer-with 40+ years of experience. Bravo! Well done!

  20

• JA

  @jamesjacobs5954 · 8 days ago

  This system in Otokok,Alberta was built in 2007. It was recently decommissioned due to replacement and maintenance costs.

  2

• JU

  @justingreen8572 · 2 weeks ago

  Now hook a solar tube water heater to it with a 12v pump and damn that would be amazing.

  10

• BI

  @billlyell8322 · 2 weeks ago

  The problem with water is it caps out at just over 200 degrees before it flashes to steam. And yes it absorbs heat faster than sand but it also losses it faster too. That is why sand is used for serious thermal storage. It tops out at 2000 degrees tempreture and that&apos;s far above what water does. Even if you cut that in hald you need 1/10 the size of a sand battery as you do a water battery. So instead of 1000 gallon water tank you only need a 100 gallon sand battery tank. And that tank can easily store 5 times the heat the water tank can.

  28

• BL

  @blizmak9889 · 2 weeks ago

  Drop some zinc and copper plates into the tank and use it as a chemical battery.

  3

• IS

  @istvandrdory6735 · 13 days ago

  It depends on the time distribution of the hot and cold, shiny and dark periods in that area. If you have dark and cold months in the winter, forget this storage.

• GU

  @guywilliams3108 · 2 weeks ago

  Putting a tank in the ground to hold glycol , and then running it through a geothermal ground loop that is doable , and so is that in solar , if you want to heat it up even more

• GE

  @georgetaylor2640 · 11 days ago

  For my semi detached house in the UK - I use 13000kwh of gas right now. I would need 66 of these tanks to store 250 tons of water to get through the winter. <br>Cheap? &nbsp;At least $50,000. <br>Just the tanks. Now for the panels to collect that energy. And the pumps. And the control equipment. And the underfloor heating. Another $50k, probably. <br>The volume of water storage needed is twice the floorplan of my house at 2.5m deep. About as much water as my local public swimming pool. <br>I think I’ve seriously underestimated the cost … more like $200k.

• LY

  @lylestavast7652 · 10 days ago

  I get that earth tubes which deposit air into the home are a good thing and not part of building code and maybe have issues of mold etc... &nbsp;fine. &nbsp;<br>Why not do it anyway but have it with a flapper valve that draws from it when the outside heat pump condenser &nbsp;unit needs to cycle - put &nbsp;it &nbsp;in a small enclosure and have a second flapper that allows rejecting air the same as happens now.

• PH

  @philip48230 · 2 weeks ago

  Does this also address the Hot Water usage?

• MI

  @michellekonzack · 8 days ago

  A DIY water based heat storage is only relevant, if you have a rocket heater of stove, which deliver 25kW and more in an hour.