diy solar

diy solar

Recent content by Michelle Konzack

  1. M

    Which pipes for SandBattery (whole underground of my Winter Greenhouse)

    I think, I will dig a 4m3 hole and make a prototype insert a Pipe if a One-Wire Temperature sensor all 10cm and see what happen. As people sayed, there is a problem with sand and conductivity, hence it is not possible to put a Pipe on the bottom of a Sand-Heat-Storrage, heat it up and then put...
  2. M

    Storing heat in sand?

    This was my first idea too, But it would require under my Greenhouse 5 bunker cells 4,0x6,8m, insulated with 50mm EPS and then a bag of HDPE or EDPM, which can be even ordered from Chinaman for a resonable price. Heated up to 70degC, you can store per Meter hight roughly 1.250kWh of energy. The...
  3. M

    Store Excess Solar (and Wind) energy in the ground as heat

    But the pressure is not really true, because once the system is filled up, the inlets and outlets have the same niveau and you have only to circulate them. I have a Grundfoss UP15-14B with 5Watt and official it can use only 0,8m, but my small Underfloor Heating in the Bathroom is 3m higher and...
  4. M

    Store Excess Solar (and Wind) energy in the ground as heat

    This is roughly 1,4bar and very high. What inside diameter has your pipe and how long is it? I was thinking on a 32mm version, which give over 200m with 10l/min which give a pressure loss of lesser then 300mBar and I can put 3 loops in parallel. Maybe I make even only 160m length (or even...
  5. M

    Store Excess Solar (and Wind) energy in the ground as heat

    Thanks , I will Insulate the sides over the whole surface, But also around 0,5m deep Horizontal around the Greenhose with a width of 2,4m (two times the length of an EPS Plate) Since the GreenHouse is a massive building (we can get very nice wind speeds here and the Greenhouse is free...
  6. M

    Storing heat in sand?

    Simply add Glycole to it (minimal 20%) to prevent mold and reduce rusting of the barrel
  7. M

    Why This Subforum Exists.

    Maybe you will never post again...
  8. M

    Why This Subforum Exists.

    Only in unloved neighbour gardens and with RC. LOL
  9. M

    Which pipes for SandBattery (whole underground of my Winter Greenhouse)

    Good evening, I need a technical advice to Heat Pipes. I build a WinterGreenhouse with 21,5m x 7,2m but dig it 2,5-3m deeper out because I want to install 500m of pipes which contain a Water-Glycole mix and is heated trough a 9kW In-Flow Heater Using the Fronius Ohmpilot and a Fronius Symo...
  10. M

    Store Excess Solar (and Wind) energy in the ground as heat

    How do you archive this Off-the-Grid? To run a Heatpump in an Estonan DecemberI would need at least 100kWp of Solarpanels The problem is only, if you have more or less no sun in December, you have no wind in the same time. In my last 7 year in Estonia, I have never gotten from my 5 Windmills...
  11. M

    Store Excess Solar (and Wind) energy in the ground as heat

    My SandBattery/ThermalStorrage is the WHOLE Surface of the GreenHouse. Hence probably 21,5x7,2m and under the floor at least 2,5m deep. In Sand you can store 0,3kWh/degK/m3. The ground temperature is in the FIRST year 10degC. We want to archive a storrage temperature of at least 50degC...
  12. M

    Off grid - best current options for effective lighting

    I suggest you to go with 230Vac and 24Vdc I have my PowerStation 36m away from my House and use 24V for everything. I have no problem with 24Vdc lighting The 230Vac are only for Heavy Devices like Circulation Pumps, 240l Fridge, Induction Cooker, Baking Oven, KitchenHelper What are the...
  13. M

    Solar dump to ground

    If you use Geothermal Heating, you can dig-up your garden e.g. 4-5m deep and at least 100m2 put a HDPE Pipe into which has a circulation pump and and In-Flow Heater and then back fill it 2,5-3m put another HDPE pipe in which you use to take out the Energy Insulate the top, put a drainage...
  14. M

    Store Excess Solar (and Wind) energy in the ground as heat

    Good day Off-Grider, I live in Estonia Off-the-Grid and I am co-owner of a small organic farm We have rough climate up to -40degC and last year, many of out pre-grown plants died in June (!!!) when we got MINUS Temperatures. My Farm was not the only one, because an apple farm with several ha...
  15. M

    Caution Before Purchasing Victron from XYZ Distributor!

    He is NOT the only one... If someone Off-the-Grid (in Estonia) invest 25.0000€ into Pylontech Batteries and then in the first winter (December 2023) the Pylontech failes... ...and in February (we got -30degC) it still does not work and the seller do not care! Pylontech can be happy, that it...
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