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Topic Title: PV storage
Topic Summary: Customer thinking slightly out of the box
Created On: 08 October 2012 07:04 PM
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 08 October 2012 07:04 PM
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slittle

Posts: 3587
Joined: 22 November 2007

Had a call today from one of my farmers, he's just had 20kva of PV installed on his farmhouse and has come up with an interesting idea.

Install a storage heater in his kitchen and use it instead of the aga. Use the PV to charge it during the day as he tells me the rates are better if used than sold. If it's a dull day then revert to off peak to charge it.

The fun part is going to be working out whether there is enough PV output available to run the heater.

Obviously he's had too much time on his hands ploughing.

Stu
 08 October 2012 07:13 PM
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bajb

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Use an Immersun or cascaded Immersuns to power the heater(s) and it will work excellently
http://www.immersun.co.uk/
 08 October 2012 07:14 PM
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OMS

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Joined: 23 March 2004

Have a look for solar diverters or controllers - they can intelligently manage a load based on other household consumptioin at a point in time - typically used for iimmersion heaters - but charging NSH shouldn't be too difficult

Regards

OMS

-------------------------
Failure is always an option
 08 October 2012 08:20 PM
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weirdbeard

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Originally posted by: slittle


Install a storage heater in his kitchen and use it instead of the aga.



A storage heater won't be so useful for cooking a hearty winter casserole!

How about suggesting he gets an electric fired aga? I believe you can get a conversion kit to run an existing aga off a 13A supply.
 08 October 2012 09:05 PM
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slittle

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Originally posted by: weirdbeard

Originally posted by: slittle





Install a storage heater in his kitchen and use it instead of the aga.







A storage heater won't be so useful for cooking a hearty winter casserole!



How about suggesting he gets an electric fired aga? I believe you can get a conversion kit to run an existing aga off a 13A supply.


More of a concern is the rail on the front of the aga is just the right height for my a.$e to perch on which is always good in the winter when you go in for a cup of coffee to discuss the next project. Not sure a NSH will have the same effect !
 08 October 2012 09:45 PM
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sparkingchip

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A immersion heater in a hot water cylinder seems like a cunning plan.

Andy
 08 October 2012 11:44 PM
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sparkingchip

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And more use than a storage heater on a hot sunny summers day.

Andy
 08 October 2012 11:53 PM
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baldelectrician

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You could make hydrogen from passing electricity through water and then burn the hydrogen in a converted generator to make power.

Bit of planning required first

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baldelectrician.com
 09 October 2012 09:15 AM
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AJJewsbury

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Perhaps one of these: http://www.meteorelectrical.co...ent-sensing-relay.html in the PV circuit, controlling a contactor in the heater circuit?

That said, it's not an ideal use of high grade electricity, and the PV output is likely to be best when the heating demand is low and vice versa.

- Andy.
 09 October 2012 12:54 PM
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AdrianWint

Posts: 265
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I've been following (and contributing) to a thread over on DIYnot about just this. A guy on there has written code running on the Rasberry Pi which looks at the direction of power flow on the meter tails & brings in load (immersion heaters in his case) to try & prevent any power being exported.

I got involved in how to determine the DIRECTION of power flow (not as easy as you might first think!) but hes got a working prototype running.

Now, since the FIT assumes that you do export a percentage of your solar power back out on the grid (and you've been paid for it!), whether such a system is morally acceptable is another debate .....
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