Sand battery heater

Have a look at the sill planters made of stone - easier to fit and you could add multiple of them.

With that size pot I would say why are you not testing already ....
 
By 10am geyser is hot. Battery is full.
Only solution for solar is more batteries.
In the winter I run the underfloor heating all day off the panels then it turns of at night. Very thick tiles so they stay warm till about 5am.
 
I lose about 50% on rainy days. So geyser is hot by 12pm.
That is not using the battery.
Also one has to change habits.
Dont use hot water for baths in the evening.
Insulate the geyser and pipes properly this makes a big difference.
 
BBSA said:
The actual energy you get out depends on the efficiency of the storage and retrieval process. Some energy is typically lost due to heat loss, especially when using thermal storage systems.
Click to expand...
Heat loss is what you want in this case ie if sand battery is indoors you lose nothing as that was its purpose to heat the home overnight
 
Thugscub said:
I lose about 50% on rainy days. So geyser is hot by 12pm.
That is not using the battery.
Also one has to change habits.
Dont use hot water for baths in the evening.
Insulate the geyser and pipes properly this makes a big difference.
Click to expand...
Sure you can use hot water at night , just have a timer on it so it doesn't heat with eskom leave it cold to heat via solar next day

Some that use some water at night and some next morning say they heat to 70 thus use less at night ir more cold water to get desired temp

And then the left overs may be warm enough for a morning shower still
 
BBSA said:
I've been thinking about using a geyser element powered by spare solar energy to heat sand in a bucket, which could then be used to warm a small room later. It sounds like a promising idea, but I'm unsure about how long the element would last under such conditions. Has anyone tried this or have any thoughts on the longevity of the heating element?
Click to expand...

What happened? I'm guessing the heating element housing couldn't provide enough insulation and the cable sleeving started melting?
 
tetrasect said:
What happened? I'm guessing the heating element housing couldn't provide enough insulation and the cable sleeving started melting?
Click to expand...
yea geyser element is designed to be submersed if not they explode or melt
you need an element desined not to be in water like a oven element that can actually handle the heat
it will actually last better in sand as air is the worst medium for heat transfer
 
polarnightenergy.com

Sand Battery

The Sand Battery is a large-scale, high-temperature thermal energy storage system that uses sand or similar materials as its storage medium. It enables our clients to meet their climate goals while…
polarnightenergy.com polarnightenergy.com
 
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