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  • FIRST POST
    • zeupater
    • By zeupater 21st Jul 13, 5:35 PM
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    zeupater
    Discussion ... ASHP(Air/Air) with Solar pv ....
    • #1
    • 21st Jul 13, 5:35 PM
    Discussion ... ASHP(Air/Air) with Solar pv .... 21st Jul 13 at 5:35 PM
    Hi All

    The combination of a small ASHP(Air/Air) with Solar pv seems to be a valid pairing of complementary technologies which has been raised a number of times on this forum.

    The idea of this thread is to encourage discussion of this combination in order to validate what an appropriate equipment specification would look like in order to maximise performance benefits in a typical domestic environment.

    Obviously, it is well understood that a typical domestic-scale solar pv system will not generate sufficient energy to provide winter heating, but should be considered as being a 'shoulder' months supplementary heat source for well insulated properties ... it is therefore best to concentrate on Spring & Autumn as being the target periods for heat provision, with an additional benefit of provision of cooling in heat-wave conditions such as we've been experiencing recently.

    HTH
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
Page 9
    • ASavvyBuyer
    • By ASavvyBuyer 19th Jun 17, 7:31 AM
    • 505 Posts
    • 1,303 Thanks
    ASavvyBuyer
    Hi

    Same here, had our running at 22C for a few hours and most of the time we were still exporting ~90% of generation.

    HTH
    Z
    Originally posted by zeupater
    Same here, running at 22C for the last two days (during the day) and still exporting loads as it hardly uses any power when cooling
    Rhondda Cynon Taf, 4kWp, W roof, 30° pitch, 16 x 8.33 Eternity 250w E+10 panels, Solar Edge SE4000-16A Inverter + P300 Optimisers & REUK Diverter
    + Toshiba RAS-10G2KVP-E Ultra High Efficiency Air Conditioner/Heat Pump
    • Exiled Tyke
    • By Exiled Tyke 19th Jun 17, 11:20 AM
    • 225 Posts
    • 792 Thanks
    Exiled Tyke
    OK I'm getting a little further ('though obviously will miss the heatwave). Does anybody have any experience/views of the LG Libero range? I can't see them mentioned here but they seem to fit the bill i.e. reasonably priced and extremely controllable.

    Thanks
    Install 28th Nov 15, 3.3kW, (11x300LG), SolarEdge, SW. W Yorks.
    • Martyn1981
    • By Martyn1981 19th Jun 17, 1:36 PM
    • 5,782 Posts
    • 9,828 Thanks
    Martyn1981
    OK I'm getting a little further ('though obviously will miss the heatwave). Does anybody have any experience/views of the LG Libero range? I can't see them mentioned here but they seem to fit the bill i.e. reasonably priced and extremely controllable.

    Thanks
    Originally posted by Exiled Tyke
    Not the most efficient, but that's what I have, the 3.5kW model, very cheap, very quiet.
    Just 'call me Mart'. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • ASavvyBuyer
    • By ASavvyBuyer 22nd Jun 17, 10:28 AM
    • 505 Posts
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    ASavvyBuyer
    The recent heatwave has reminded us of your comment when we were considering getting an air conditioner/heat pump.
    Your missing one major point.....how much is a good nights sleep worth when we get a heatwave(uncommon I know)?
    There's been a good few days this year I've had the aircon on all day(for free) and had to get under the duvet at night to keep warm while all the neighbours have their windows wide open trying to keep cool...for me...that's priceless
    Originally posted by tunnel
    For the last few days we have had the aircon on all day at 22C cooling the lounge, but also with the internal doors open, the rest of the bungalow. It has worked a treat; and all using solar generated power
    Last edited by ASavvyBuyer; 22-06-2017 at 10:29 AM. Reason: typo
    Rhondda Cynon Taf, 4kWp, W roof, 30° pitch, 16 x 8.33 Eternity 250w E+10 panels, Solar Edge SE4000-16A Inverter + P300 Optimisers & REUK Diverter
    + Toshiba RAS-10G2KVP-E Ultra High Efficiency Air Conditioner/Heat Pump
    • Martyn1981
    • By Martyn1981 30th Jul 17, 4:20 PM
    • 5,782 Posts
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    Martyn1981
    As this thread is about the small scale use of solar and heat pumps, I thought, just for a laugh, I'd point to the more extreme end to show just what is possible:-

    Study: Solar Heating Could Provide More Than 80% Of Heating Energy For Households In Finland
    Just 'call me Mart'. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • ASavvyBuyer
    • By ASavvyBuyer 7th Aug 17, 11:07 AM
    • 505 Posts
    • 1,303 Thanks
    ASavvyBuyer
    Recently had a questionaire from E.on about them potentially providing Air Heat Pumps. Proposed cost was between £5k - £9k fully installed, to save approximately £100/year on energy costs!

    So even based on the lowest cost, it would take 50 years to pay for itself, not allowing for inflation or loss of interest.
    Rhondda Cynon Taf, 4kWp, W roof, 30° pitch, 16 x 8.33 Eternity 250w E+10 panels, Solar Edge SE4000-16A Inverter + P300 Optimisers & REUK Diverter
    + Toshiba RAS-10G2KVP-E Ultra High Efficiency Air Conditioner/Heat Pump
    • zeupater
    • By zeupater 7th Aug 17, 4:09 PM
    • 3,697 Posts
    • 4,553 Thanks
    zeupater
    Recently had a questionaire from E.on about them potentially providing Air Heat Pumps. Proposed cost was between £5k - £9k fully installed, to save approximately £100/year on energy costs!

    So even based on the lowest cost, it would take 50 years to pay for itself, not allowing for inflation or loss of interest.
    Originally posted by ASavvyBuyer
    Hi

    Perhaps the E.ON representative (malc) could feed back information to management on how ridiculous their option is to a sane person! ...

    HTH
    Z
    Last edited by zeupater; 07-08-2017 at 4:52 PM. Reason: -same +sane
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • Martyn1981
    • By Martyn1981 14th Sep 17, 10:43 AM
    • 5,782 Posts
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    Martyn1981
    Little bit of ASHP today, almost all PV supplied. Cool.
    Just 'call me Mart'. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • ASavvyBuyer
    • By ASavvyBuyer 14th Sep 17, 11:44 AM
    • 505 Posts
    • 1,303 Thanks
    ASavvyBuyer
    Little bit of ASHP today, almost all PV supplied. Cool.
    Originally posted by Martyn1981
    Don't you mean "Warm"

    Had ours on a few times recently when its been a bit cool; all PV supplied and very quick to take the chill of the room.
    Rhondda Cynon Taf, 4kWp, W roof, 30° pitch, 16 x 8.33 Eternity 250w E+10 panels, Solar Edge SE4000-16A Inverter + P300 Optimisers & REUK Diverter
    + Toshiba RAS-10G2KVP-E Ultra High Efficiency Air Conditioner/Heat Pump
    • zeupater
    • By zeupater 14th Sep 17, 12:29 PM
    • 3,697 Posts
    • 4,553 Thanks
    zeupater
    ..Had ours on a few times recently when its been a bit cool; all PV supplied and very quick to take the chill of the room.
    Originally posted by ASavvyBuyer
    Hi

    Same here, but I've decided to open up all of the internal doors and assist the solar gain to charge-up the house as a thermal mass store today ... same as you, all on PV ...

    HTH
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • ASavvyBuyer
    • By ASavvyBuyer 14th Sep 17, 2:15 PM
    • 505 Posts
    • 1,303 Thanks
    ASavvyBuyer
    Hi

    Same here, but I've decided to open up all of the internal doors and assist the solar gain to charge-up the house as a thermal mass store today ... same as you, all on PV ...

    HTH
    Z
    Originally posted by zeupater
    Same again here, all internal doors open, so the warm air is flowing to all the other rooms. We also have solid internal walls (and cavity filled external walls), so they also act as a thermal mass store retaining and then releasing the heat in the evening when the sun goes down.
    Rhondda Cynon Taf, 4kWp, W roof, 30° pitch, 16 x 8.33 Eternity 250w E+10 panels, Solar Edge SE4000-16A Inverter + P300 Optimisers & REUK Diverter
    + Toshiba RAS-10G2KVP-E Ultra High Efficiency Air Conditioner/Heat Pump
    • zeupater
    • By zeupater 14th Sep 17, 3:19 PM
    • 3,697 Posts
    • 4,553 Thanks
    zeupater
    Hi

    Currently ~3kW of heating, boiling the kettle, watching TV, laptop charging, solar thermal pump doing it's thing, all baseload covered ... and we're still exporting well over 1kW to the grid ...

    HTH
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • Martyn1981
    • By Martyn1981 14th Sep 17, 5:43 PM
    • 5,782 Posts
    • 9,828 Thanks
    Martyn1981
    Fully Charged has just released part 2 of their Orkney Island visit, so far they've covered the use of hydrogen storage for excess generation and the building of 'better' homes.

    Gas and now oil are not options, so they are using heat pumps. Combination of build quality and about £200 savings from PV, leave them with annual energy bills of £600pa which I didn't think was bad given the location, all electric and that they were 3 bed semi's.
    Just 'call me Mart'. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
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