Direct heating iso exporting

[michiel]

Hallo,
Can anyone help me with the following?

I have a property, with a 3ph supply, through an import-export meter.
On site, I have an 11kW 3ph wind turbine and 3.8kW of PV Panels.
Whenever I ‘over produce’ the surplus is exported back to the grid, against a measly 3-4p/kWh.
On site there is a 1000lt buffer tank, from the geothermal heating system, and a heated 39.000lt pool.
In the buffer tank and in the pool system there are 2x 9kW 3ph immersion heaters installed, but not yet connected.

I know that in Denmark they have a system whereby you can ‘divert’ purely the exported electricity, per phase, to these immersions.
This way you utilise/use 100% of your generated electricity on-site, without ‘drawing’ from the grid when the immersions are being powered.
The electricity going through the immersion will obviously vary, also per phase, depending on the ‘over production’.

Is anybody aware of such a system in the UK?

[guydewdney]

http://www.newfound-energy.co.uk/load_control.htm

try this - have emailed to see if its possible

[michiel]

Sorry for delay, been away all week.

Guy, did you get a reply??

Something else I have been thinking about is the following:
The property is 100% geared to electricity, no gas, oil, etc.
I recon 75% of usage is for the heatpump. (11kW input + wellpump)
The pump obviously only runs intermittantly.
When running, I fully utilise my own generation.
As soon as the pump stops, I over produce.

My pv consists of the following;
1x1.25kw, through SB1300, and 1x 2.6kW through SB2500, grid tied.

In the 1000lt buffertank there is also a 1ph 3kW immersion.

Could I not better use one of the 2 strings to directly power this immersion?
That way I utalise whatever the pv produces myself, iso exporting.

The problem I have is the very large fluctuation of demand.

Any ideas??

[guydewdney]

Not a good reply - the goizmo is 5 grand 


Could the gshp control be connected to a changeover relay, so that when it isnt running - the excess powers a heater (or similar) then when the gshp fires up, the power gets used for your warm water?