#1 Nov. 17, 2013 11:46:00

rogerhoward
From: Southend
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Solar-friendly Home Appliances


Having a split East-West pair of arrays, I've generated over the last 12 days only a paltry average 2.27kWh per day. But annoyingly, I've seen from my Smart Meter that I've still exported an average 33% of that - with increased grid consumption to match


I assume that others who can't monitor their exporting are unwittingly doing the same. Without real-time PV monitoring, scheduling use of appliances to use PV generation rather than the grid is clearly a lot easier said than done.


So I'm starting this thread in the hope that we can share tips for simple Home Appliances (i.e. less than 3kW hot water immersion switchers) that are good at utilising our PV generation.


I'm thinking of any appliances folks know of that avoid the serious, fast grid-gulp. For example, we have a 90W/150W Slow Cooker, but I guess everyone knows about them.


Can anyone make any suggestions?







Economy 10 tariff provides 6.9p/kWh off-peak import between 12am-5am, 1pm-4pm and 8pm-10pm; http://www.pvoutput.org/aggregate.jsp?id=21047&sid=18934&v=2&t=m on approx. 63% off-peak usage, 22% solar usage, and 15% peak-rate usage.
1,900kWh annually is exported, mostly in summer, on approx. 3,200kWh generation. Approx. 4,500kWh/year is imported, mostly for (a) winter and springtime off-peak Storage Heaters, and (b) off-peak hot water Immersion heating (which is “dumb”, i.e. not linked to the solar PV).
PV array is split East-West. Income is from Phase II 21p/kWh Feed-in-Tariff plus smart metered 3.2p/kWh Export Tariff.

Edited rogerhoward (Nov. 17, 2013 11:46:00)

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#2 Nov. 17, 2013 13:47:00

rogerhoward
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Solar-friendly Home Appliances


My shameless Eric Morcambism is in order to kick-off with something myself.


We've now got the 3L capacity Superkettle, which only uses 45W in keep-warm mode - ideal on days when at home and particularly on the Good Lady's study days here when a lot of tea is consumed, believe me.


The last estimate I saw quoted was an annual average 167kWh/£24 per year that is spent running a conventional 2kW grid-gulp kettle. I'll be happy if the Superkettle saves us £10/year - and I don't think that will be difficult here. Cost was £54 + £8 pp.


700W is used to Refill Reboil, which I'll try to do when sunny or, failing that, when on our ever-useful 20% Discount tariff.


The Superkettle acts like an urn.







Economy 10 tariff provides 6.9p/kWh off-peak import between 12am-5am, 1pm-4pm and 8pm-10pm; http://www.pvoutput.org/aggregate.jsp?id=21047&sid=18934&v=2&t=m on approx. 63% off-peak usage, 22% solar usage, and 15% peak-rate usage.
1,900kWh annually is exported, mostly in summer, on approx. 3,200kWh generation. Approx. 4,500kWh/year is imported, mostly for (a) winter and springtime off-peak Storage Heaters, and (b) off-peak hot water Immersion heating (which is “dumb”, i.e. not linked to the solar PV).
PV array is split East-West. Income is from Phase II 21p/kWh Feed-in-Tariff plus smart metered 3.2p/kWh Export Tariff.

Edited rogerhoward (Nov. 17, 2013 13:47:00)

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#3 March 31, 2014 10:17:00

rogerhoward
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Solar-friendly Home Appliances


Four months on I can say that this will have paid for itself in another 12 months, and if anyone can suggest something else with an 80% Return on Investment then I'm all ears.


By swapping out my old 2kW ‘grid gulp’ kettle for this that ‘slow sips’ the solar instead, grid consumption has been about 40kWh/month less than before! It is super-insulated, but I've been really astonished at what a difference can be made by finding a simple solar-friendly alternative to a ‘grid gulp’ appliance.


40kWh/month just for a kettle does sound incredibly high though - even taking accoun of the Good Lady's study days at home - and I'll check this again after another a couple of months!







Economy 10 tariff provides 6.9p/kWh off-peak import between 12am-5am, 1pm-4pm and 8pm-10pm; http://www.pvoutput.org/aggregate.jsp?id=21047&sid=18934&v=2&t=m on approx. 63% off-peak usage, 22% solar usage, and 15% peak-rate usage.
1,900kWh annually is exported, mostly in summer, on approx. 3,200kWh generation. Approx. 4,500kWh/year is imported, mostly for (a) winter and springtime off-peak Storage Heaters, and (b) off-peak hot water Immersion heating (which is “dumb”, i.e. not linked to the solar PV).
PV array is split East-West. Income is from Phase II 21p/kWh Feed-in-Tariff plus smart metered 3.2p/kWh Export Tariff.

Edited rogerhoward (March 31, 2014 10:17:00)

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#4 April 22, 2014 10:48:00

SolarDave
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Solar-friendly Home Appliances


Hi All,





my workaround has been to attach the Br Gas Home Energy Monitor as per recommendations - but in our case their is a solar array either feeding in or not into the mains meter side.  what you get on the Br Gas reader is a realtime reading, so we can see what the net solar energy is at a point in time, and whether its worth putting on the washer!  the only problem is that it doesn't show a negative - ie where you are using mains electric over and above the realtime solar energy.  but you can do this by using commonsense of what it was and then subtracting the energy use of the appliance eg washer is 2.5kw.


Also lowenergy kettles at Argos - traveltype, either 0.45litre or 1.0litre of tea at consumption of 600w or 1.1Kw.  so both save on water use too, partic if you are on a water meter!








Edited SolarDave (April 22, 2014 10:48:00)

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#5 April 22, 2014 11:14:00

SolarDave
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the argos kettle is at http://www.argos.co.uk/static/Product/partNumber/4238744.htm and we also use the 12 hour hot water flasks from eg Field and Trek. fill up in the afternoon for a lovely free electric two or three cups of tea each in the evenings!





Edited SolarDave (April 22, 2014 11:14:00)

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#6 May 31, 2014 09:19:00

rogerhoward
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Solar-friendly Home Appliances


It seems to be about a 180kWh/year of consumption that I've switched from grid usage to solar usage by ditching my 2kW traditional grid-gulp kettle for this ‘Superkettle’, equating to a 3 year payback :-)


But beware of rapid larder depletion of cuppa-soups, pot noodles, etc.


If anyone knows of a better solar-friendly appliance to replace another of our grid-gulpers, I'm all ears.










Economy 10 tariff provides 6.9p/kWh off-peak import between 12am-5am, 1pm-4pm and 8pm-10pm; http://www.pvoutput.org/aggregate.jsp?id=21047&sid=18934&v=2&t=m on approx. 63% off-peak usage, 22% solar usage, and 15% peak-rate usage.
1,900kWh annually is exported, mostly in summer, on approx. 3,200kWh generation. Approx. 4,500kWh/year is imported, mostly for (a) winter and springtime off-peak Storage Heaters, and (b) off-peak hot water Immersion heating (which is “dumb”, i.e. not linked to the solar PV).
PV array is split East-West. Income is from Phase II 21p/kWh Feed-in-Tariff plus smart metered 3.2p/kWh Export Tariff.

Edited rogerhoward (May 31, 2014 09:19:00)

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#7 July 5, 2014 11:31:00

TerFar
Registered: 2014-06-21
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Solar-friendly Home Appliances


I've had an OWL energy monitor since long before PV installation. It is pretty useless in the daytime when generating power because it cannot distinguish whether power is flowing in or out of the grid.


The solution was to buy a REL Wireless Renewable Energy Monitor from eBay for just £30. This is connected to the live feed from the PV panels just prior to the combining block (where the grid and PV power lines are joined). This meter shows real time and historical generation patterns. The handbook translation is horrible, but it all works fine! Obviously, the realtime power is the most useful reading!





Edited TerFar (July 5, 2014 11:31:00)

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#8 Jan. 31, 2015 18:21:26

Gary
Registered: 2014-06-29
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Solar-friendly Home Appliances

Lidl recently had tea-makers for about £12. 650W, they work a bit like a coffee machine by passing the water over a heater which forces the boiling water up a tube and onto the tea. We bought one and results are mixed but not bad.

We use teabags and tend to make 1 cup at a time as I prefer coffee and my wife tea. with only 1 teabag in the top I felt too much water was missing the tea with the resultant brew being weak. covering half of the tea basket with foil solved that. But with hard water and 1 teabag my wife says she prefers grid-gulp tea using the kettle.

If you make larger quantities or use loose tea I think the results would be better, especially as the Germans treat tea-making as a science in much the same way we Brits do with coffee - it must work coming from a German source…

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#9 March 31, 2015 15:39:16

oldsilverfox
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Solar-friendly Home Appliances

We've bought 2 x DeLonghi ceramic fan 1.5 kw heaters to use on our 2.5kw array.
They are vertical column fan heaters, costing around £50 each from Currys.
They have fairly accurate thermostats and were favourably reviewed by Which.
If we have a chilly but sunny morning, we switch them on half power x 19 degree setting which effectively bottom slices the load on the gas boiler on our central heating.
If anyone is interested I could identify the actual model.
Hope that this helps.


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#10 April 3, 2015 15:02:09

Sunnyman
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We use a whistling kettle on an induction hob, which means that we can adjust the hob power to roughly match what is being generated. Turn it on low well before needed if solar generation is low More adaptable than 3K electric kettle. Owl monitor in kitchen helps with this power matching.

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