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  • FIRST POST
    • ajbell
    • By ajbell 13th Oct 16, 6:32 PM
    • 782Posts
    • 2,495Thanks
    ajbell
    Excess solar power
    • #1
    • 13th Oct 16, 6:32 PM
    Excess solar power 13th Oct 16 at 6:32 PM
    What do you do with it?.
    I have a diverter so get a tank or two of hot water per day, all battery powered stuff charged, but still end up sending loads back to the grid.
    Any ideas for other uses?.
    Can I connect something else to the second output of my iboost?. Would an oil filled radiator be suitable to be directly wired to the second output and what if it was a 1500w radiator and the excess was more than that?.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
Page 1
    • rugbyleaguesmate
    • By rugbyleaguesmate 13th Oct 16, 7:47 PM
    • 91 Posts
    • 478 Thanks
    rugbyleaguesmate
    • #2
    • 13th Oct 16, 7:47 PM
    • #2
    • 13th Oct 16, 7:47 PM
    I'm really interested in this also!
    6.72kw Pv Ja Solar 280w * 24 panels, Solar Edge inverter, South facing no shading.
    South Lake District, delightful view of Morecambe Bay. Saving up for a battery

    December Solar target 160kw
    • pinnks
    • By pinnks 13th Oct 16, 9:27 PM
    • 438 Posts
    • 1,025 Thanks
    pinnks
    • #3
    • 13th Oct 16, 9:27 PM
    • #3
    • 13th Oct 16, 9:27 PM
    Hi,

    If you search on immerSUN you'll find quite a lot on here on this subject. You can put any resistive load on your diverter - kettle, toaster, oil radiator and so on.

    I have a second inverter on which I have 2 oil rads. when one is hot so its internal thermostat turns it off, the other one cuts in. Works really well at this time of year to raise the living room temp by a few degrees and to take the strain off the GCH.

    We also have a 1kW kettle, which means we import less morning and evening when making tea etc.
    Wiltshire - 5.25kWp
    3.5kWp: 14 x Phono Solar 250 Onyx, Sunny Boy 4000TL, WSW 40 degrees, June 2013
    1.75kWp: 7 x Phono Solar 250 Onyx, Sunny Boy 1600TL, SSE 45 degrees, March 2014
    • ajbell
    • By ajbell 13th Oct 16, 11:26 PM
    • 782 Posts
    • 2,495 Thanks
    ajbell
    • #4
    • 13th Oct 16, 11:26 PM
    • #4
    • 13th Oct 16, 11:26 PM
    what if I wire in a 1.5kw radiator and there is 3kw to divert, will it try to put 3kw in?.
    Do you hard wire it to the iboost/immerSUN?.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
    • Martyn1981
    • By Martyn1981 14th Oct 16, 7:44 AM
    • 4,925 Posts
    • 8,493 Thanks
    Martyn1981
    • #5
    • 14th Oct 16, 7:44 AM
    • #5
    • 14th Oct 16, 7:44 AM
    what if I wire in a 1.5kw radiator and there is 3kw to divert, will it try to put 3kw in?.
    Do you hard wire it to the iboost/immerSUN?.
    Originally posted by ajbell
    Hi. If you think about it, the grid is trying to pump 20kW to 25kW into your house via the main fuse (80-100A), but your leccy devices, including the oil rad only 'take' what they need. The same would apply to the excess PV diversion. Also the household items don't know it's PV since it all comes from the consumer unit anyway, so it'll all operate entirely as normal (just with the option to dial the power down below max).

    Mart.
    Just 'call me Mart'. Cardiff. 5.58 kWp PV systems (2.4 ESE & 1.18 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • ASavvyBuyer
    • By ASavvyBuyer 14th Oct 16, 9:29 AM
    • 179 Posts
    • 238 Thanks
    ASavvyBuyer
    • #6
    • 14th Oct 16, 9:29 AM
    • #6
    • 14th Oct 16, 9:29 AM
    We also currently use an oil filled radiator of 500/1000/1500 watts to use excess power and provide a bit of background heating; which helps delay the need for the central heating coming on when we have bright, but cooler days.

    However, it is worth taking a look at this topic http://forums.moneysavingexpert.com/showthread.php?t=4715287&page=4#topofpage as it has given us the inspiration to look into the possibilities of using an efficient air conditioner to provide heating in the same way. We are currently getting quotes from a number of companies and hope to get something installed soon.
    Rhondda Cynon Taff, 4kw West Facing PV, 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
    • ajbell
    • By ajbell 14th Oct 16, 11:07 AM
    • 782 Posts
    • 2,495 Thanks
    ajbell
    • #7
    • 14th Oct 16, 11:07 AM
    • #7
    • 14th Oct 16, 11:07 AM
    So can i wire in an extension lead to the second output?.
    If so would it be safe to use a 10m extension so I could use the excess power downstairs (my iboost is in the airing cupboard).
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
    • ASavvyBuyer
    • By ASavvyBuyer 14th Oct 16, 12:19 PM
    • 179 Posts
    • 238 Thanks
    ASavvyBuyer
    • #8
    • 14th Oct 16, 12:19 PM
    • #8
    • 14th Oct 16, 12:19 PM
    So can i wire in an extension lead to the second output?.
    If so would it be safe to use a 10m extension so I could use the excess power downstairs (my iboost is in the airing cupboard).
    Originally posted by ajbell
    It should be safe if you use an extension cable with the correct power rating and don't have it coiled or covered (risk of overheating). Also, it would need to be routed safely, so no risk of tripping over it.
    If you are not sure, it would be worth getting a qualified electrician to check it out.
    Rhondda Cynon Taff, 4kw West Facing PV, 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
    • legoman62
    • By legoman62 14th Oct 16, 1:19 PM
    • 1,788 Posts
    • 8,793 Thanks
    legoman62
    • #9
    • 14th Oct 16, 1:19 PM
    • #9
    • 14th Oct 16, 1:19 PM
    What about fitting an RCD-Plug-Adaptor-Circuit-Breaker in your 2nd output
    E Coast. 16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28° pitch.
    Minimal shade. Nov 2011 install. N.E Lincs Coast. Hybrid car
    • ajbell
    • By ajbell 14th Oct 16, 2:09 PM
    • 782 Posts
    • 2,495 Thanks
    ajbell
    Thanks for that, do you have a link to such a device?.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
    • legoman62
    • By legoman62 14th Oct 16, 2:45 PM
    • 1,788 Posts
    • 8,793 Thanks
    legoman62
    http://www.screwfix.com/p/masterplug-rcd-adaptor/63731?kpid=63731&cm_mmc=Google-_-Product%20Listing%20Ads-_-Sales%20Tracking-_-sales%20tracking%20url&gclid=CPuAmZ222s8CFYoW0wodJ KEAfg
    E Coast. 16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28° pitch.
    Minimal shade. Nov 2011 install. N.E Lincs Coast. Hybrid car
    • ajbell
    • By ajbell 14th Oct 16, 2:50 PM
    • 782 Posts
    • 2,495 Thanks
    ajbell
    So are you saying hard wire the extension lead into the second output then use the rcd socket in the extension?.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
    • ajbell
    • By ajbell 14th Oct 16, 3:26 PM
    • 782 Posts
    • 2,495 Thanks
    ajbell
    Also the oil filled radiator intend to use is one of those 600/900/1500w ones so what do I set it on?.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
    • zeupater
    • By zeupater 14th Oct 16, 3:30 PM
    • 3,485 Posts
    • 4,257 Thanks
    zeupater
    ... However, it is worth taking a look at this topic http://forums.moneysavingexpert.com/showthread.php?t=4715287&page=4#topofpage as it has given us the inspiration to look into the possibilities of using an efficient air conditioner to provide heating in the same way. We are currently getting quotes from a number of companies and hope to get something installed soon.
    Originally posted by ASavvyBuyer
    Hi All

    Seeing that it was ~7C overnight and 13C outside now it's 21.4C where I'm sitting and that's after opening some internal doors .... currently generating ~1250W and consuming just about half (630W) and have probably been providing a steady 2.0kW.t to 3kW.t of heat (system ramps up and down as necessary) for most of the the last 5 hours ....

    No GCH or logs burned so far this year ...

    HTH
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • legoman62
    • By legoman62 14th Oct 16, 5:56 PM
    • 1,788 Posts
    • 8,793 Thanks
    legoman62
    So are you saying hard wire the extension lead into the second output then use the rcd socket in the extension?.
    Originally posted by ajbell
    No, I would put it straight into the 2nd output.

    It would then protect the extension lead too.
    E Coast. 16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28° pitch.
    Minimal shade. Nov 2011 install. N.E Lincs Coast. Hybrid car
    • ajbell
    • By ajbell 14th Oct 16, 6:07 PM
    • 782 Posts
    • 2,495 Thanks
    ajbell
    How would you hard wire that RCD socket into the iboost?.
    And what setting on the oil filled radiator 600/900/1500w ?.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
    • ajbell
    • By ajbell 14th Oct 16, 6:08 PM
    • 782 Posts
    • 2,495 Thanks
    ajbell
    Would a surge protected extension lead do the same thing?.
    4kWp, South facing, 16 x phono solar panels, Solis inverter, Lincolnshire.
    • pinnks
    • By pinnks 14th Oct 16, 6:17 PM
    • 438 Posts
    • 1,025 Thanks
    pinnks
    I don't think wiring in a RCD would necessarily work with a diverter given the way they change the wave form of the electricity. After all this is why you can only put resistive loads on them. I tried my current measuring plug/socket on mine once and it was very unhappy!

    While on this subject, you also need to ensure your device has no fancy electronics. So, for a radiator, no fancy timers and so on. Just an on/off switch (or something which bypasses the timer - mine has an always on setting rather than using to manual timer thingy).

    Ultimately the diverters are just switches, albeit very clever ones, so you can run a cable from them but as has been said it must be suitable cable and any socket appropriately labelled as "iBoost only" or whatever. I have used cable suitable for 3kW load and kept is as short as sensible for my needs, not least because your radiator will say not to use on an extension lead to avoid overheating etc.

    Take a look here http://forums.moneysavingexpert.com/showthread.php?t=2955406&highlight=pinnks&page=73 at post #2911
    Wiltshire - 5.25kWp
    3.5kWp: 14 x Phono Solar 250 Onyx, Sunny Boy 4000TL, WSW 40 degrees, June 2013
    1.75kWp: 7 x Phono Solar 250 Onyx, Sunny Boy 1600TL, SSE 45 degrees, March 2014
    • zeupater
    • By zeupater 14th Oct 16, 8:19 PM
    • 3,485 Posts
    • 4,257 Thanks
    zeupater
    Hi

    Further to the above, I'd also be tempted to apply 'poka-yoke' logic here and foolproof the connectivity .... something like a 13A restricted access socket & plug with round earth pin would come to mind, but there are plenty of alternative solutions ...

    HTH
    Z
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
    • rugbyleaguesmate
    • By rugbyleaguesmate 14th Oct 16, 9:41 PM
    • 91 Posts
    • 478 Thanks
    rugbyleaguesmate
    Laughing lots here! For a simpleton how do I cheaply send my generation into something that benefits my home? Have a combination boiler no hot water tank but bags of enthusiasm to better use the excess kwh hrs I generate........
    6.72kw Pv Ja Solar 280w * 24 panels, Solar Edge inverter, South facing no shading.
    South Lake District, delightful view of Morecambe Bay. Saving up for a battery

    December Solar target 160kw
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