How Our heating battery Works
Our sand battery works in a configuration made of 4 parts:
1. The air heater device
(batsand component)
During summer time resistive heaters get air to 500C degrees. The air is then blown in a closed loop (inlet/outlet) through insulated stainless steel pipes to the sand vessel.
3. Air/water energy transfer
(batsand component)
When winter demands, the air is recirculated by the air/water heat exchanger, warming water until 70-80C (according to the needs), the hot water is then utilized in the central heating of the house.
2. Sand vessel
(DIY by Batsand Blueprints)
Air at 500C degrees arrives at the bottom of the vessel, circulates, and heats the sand tank. After losing its energy to the sand, the air is then extracted and heated again until the tank is at stable 500C degrees.
4. Electronics
(batsand component)
The brain. It detects when PV systems are sending the surplus electricity to the grid and activates the Air heater to consume it. If no PV systems, the API will check the local grid for pricing of Kwh and turn on when the price is low or minus.
Batsand Battery
14Kw System
For small and medium houses
The equipment is designed to supply heating for residential buildings from 200 to 500m2 depending on the heating efficiency of the building envelope.
This system needs a sand vessel of 40m3 to 80m3. Constructed according to Batsand blueprints designed purposely for this system. And it should be at a maximum distance of 6 meters from the heating equipment.
25Kw System
For medium and large houses
The system is designed to supply heating for residential buildings from 400 to 1200m2 depending on the heating efficiency of the building envelope.
This system needs a sand vessel of 70m3 to 120m3 (depending on building size). Constructed according to Batsand blueprints designed purposely for this system. And it should be at a maximum distance of 8 meters from the heating equipment.
Use Cases
Pair it to the grid or renewable energy source as solar panels and wind turbines
Sand Tank
Where the heating is stored
The vessel works as a swimming pool in your backyard. The only difference is that it is filled with sand instead of water, wrapped in home insulation and buried in a way that you don't see it. It can be done in any size (the bigger the more energy it can hold), and if constructed according to our blueprint will be able to hold energy for periods of 6-8 months without relevant losses.
All materials necessary for its construction can be bought in any DIY shop. The sand vessel can be constructed in any country, in any city, in any place. And it can be done by anybody that is willing to do the work of digging and assembling - Yes, it's that easy!
Taking into account the average pricing for materials in the EU market, the cost for the necessary materials used in heating vessels for a 350m2 residential building is 3700 Euros/USD.
Heating battery Power and Prices
The table below shows the average prices in Europe for the cost of a full system per household.
Please be aware that if your country doesnt have dynamic electricity pricing with very low rates in summer time, we recommend you to assembly the system to solar panels with the recommended power (kW) in the table.
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The estimation of the price for the solar panels varies according to the country. But as best practice, we recommend checking price for panels and inverter online to understand if prices from solar companies is up to the market price for the equipment.
House size (m2) | Consumption electricty p/year (KWH) | Batsand Power (kW) | Recommended Solar panels (kW) | Sand tank size (m3) | Sand tank heat storage (KWH) | Aproximate price of Batsand + installation (Eur) | Approximate price of Batsand + PV + installation (Eur) |
|---|---|---|---|---|---|---|---|
200-250 | 8000 | 14 | 18 | 40 | 7120 | 17660 | 33710 |
200-250 | 10000 | 14 | 20 | 40 | 7120 | 17660 | 34960 |
200-250 | 12000 | 14 | 22 | 40 | 7120 | 17660 | 36210 |
200-250 | 14000 | 14 | 24 | 45 | 8010 | 18930 | 39330 |
250-300 | 10000 | 14 | 20 | 50 | 8900 | 20200 | 38700 |
250-300 | 12000 | 14 | 22 | 50 | 8900 | 20200 | 39950 |
250-300 | 14000 | 14 | 24 | 50 | 8900 | 20200 | 41200 |
250-300 | 16000 | 14 | 26 | 50 | 8900 | 20200 | 42450 |
300-400 | 12000 | 14 | 30 | 60 | 10680 | 22740 | 48690 |
300-400 | 14000 | 14 | 32 | 60 | 10680 | 22740 | 49940 |
300-400 | 16000 | 14 | 34 | 60 | 10680 | 22740 | 51190 |
300-400 | 18000 | 14 | 36 | 60 | 10680 | 22740 | 52440 |
400-500 | 12000 | 25 | 30 | 70 | 12460 | 25280 | 52430 |
400-500 | 14000 | 25 | 32 | 70 | 12460 | 25280 | 53680 |
400-500 | 16000 | 25 | 34 | 70 | 12460 | 25280 | 54930 |
400-500 | 18000 | 25 | 36 | 70 | 12460 | 25280 | 56180 |
500-700 | 14000 | 25 | 32 | 85 | 15130 | 29090 | 59290 |
500-700 | 16000 | 25 | 34 | 85 | 15130 | 29090 | 60540 |
500-700 | 18000 | 25 | 36 | 85 | 15130 | 29090 | 61790 |
500-700 | 20000 | 25 | 38 | 85 | 15130 | 29090 | 63040 |
Household energy expenses
Below is a graphic with the energy expenses (electricity + heating) of a typical household (250-300m2 home) in Germany.
The graphic includes the cost of equipment for the given system and the acumulative costs in the range of 35 years.
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Gas heating
Gas heating + Solar panels
HeatPump
HeatPump + Solar panels
Batsand Grid
Batsand + Solar Panels