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Renewables: "talking 'bout my generation"

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  • nobby1963
    nobby1963 Posts: 355 Forumite
    Part of the Furniture 100 Posts Name Dropper Rampant Recycler
    shavy65 wrote: »
    This might be (probably is) a stupid question but is there any way I can tell when I have a full tank of hot water? My red LED on my immersion switch (fused spur) glows brighter the more electricity I`m diverting, with it obviously being out during cloudy/dark times! I thought I`d see the LED glowing bright red (during high generation/low usage times) and then dull off, or even switch off, as the hot water tank reached it`s setpoint. Anyone know?
    At the moment the light never seems to go totally out during higher generation times.
    Cheers.

    Hi,
    My Immersun box - we have it next to our main fuse box / fit meter & solar isolation switch - displays 'water hot ' when the immersion tank is fully hot.
    We also have what used to be the switch to turn on our immersion heater that has a red light on it to show that it's On ( or should I say that's what it used to signify ) now as its always in the On position the light only shows red when there is solar power going to the immersion tank. It flickers / glows constantly as power is diverted and then glows constantly when the tank is fully hot - even if there is no longer solar power being diverted to it.
    Hope that makes sense.
    Nobby.
    SMA 4000TL Inverter, 17 REC 235PE Panels, South facing, roof angle \ `ish, 3995 watt system.Installed Nov 2011.
  • shavy65
    shavy65 Posts: 562 Forumite
    Tenth Anniversary 500 Posts
    Yeah that`s the red light I was reffering to. So when you say "then glows constantly when the tank is fully hot - even if there is no longer solar power being diverted to it." How do you know if it`s glowing constantly because it`s diverting or glowing constantly because the tank`s fully hot?
    Thanks for reply.
    3.975 kWp System, South facing, 21 degree pitch, 15 x Canadian Solar Elps, Samil Inverter, location NE Scotland (Fraserburgh) Bring on the Sun :beer:
  • EricMears
    EricMears Posts: 3,309 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    shavy65 wrote: »
    Yeah that`s the red light I was reffering to. So when you say "then glows constantly when the tank is fully hot - even if there is no longer solar power being diverted to it." How do you know if it`s glowing constantly because it`s diverting or glowing constantly because the tank`s fully hot?
    Thanks for reply.
    Basically, you can't tell.

    The Immersun (or similar units) will supply electricity to the IH circuit whenever you would have been exporting. Immersun 2 supplies a reduced voltage if you don't have the full 3kW spare; Immersun 1 & competitors supply out of phase power in similar circumstances. In those cases the red light will either be full brightness, reduced brightness of flashing (extremely fast :D ) .

    Completely independently of whatever power is supplied, the IH itself will switch off completely when tank temperature exceeds the setpoint. Only way to be sure if IH is heating or not would be to measure voltage (or light a test lamp) across the IH contacts AFTER the thermostat.
    NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq5
  • shavy65
    shavy65 Posts: 562 Forumite
    Tenth Anniversary 500 Posts
    Thanks Eric, that`s what I thought. I have a basic knowledge of electronics, assuming I`d require a resistor in series with the lamp, any advice on size?
    3.975 kWp System, South facing, 21 degree pitch, 15 x Canadian Solar Elps, Samil Inverter, location NE Scotland (Fraserburgh) Bring on the Sun :beer:
  • Sterlingtimes
    Sterlingtimes Posts: 2,524 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    Spotted that this morning, thought at first your WiFi had done one, then saw the spike at 23:08:00 - 23:08:29 of 32.77 kW Generation. Then you were dead until 6:48 when you had a brief blip and using 21.99 kW; then dead until 09:30 - 09:32 with another blip, then you got back to normal at 09:38; hence Wattson did not register the 1 kWh that your Enphase did?

    Thank you, Oscar. Lego and I suffered the same issue, but the problem did not repeat itself. I wonder now whether there was a core network outage (possibly BT) at that time.
    I have osteoarthritis in my hands so I speak my messages into a microphone using Dragon. Some people make "typos" but I often make "speakos".
  • Sterlingtimes
    Sterlingtimes Posts: 2,524 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    Yesterday achieved 3.4 Os. Today at time of posting, I have exceed 4Os. Sad compared with April.
    I have osteoarthritis in my hands so I speak my messages into a microphone using Dragon. Some people make "typos" but I often make "speakos".
  • Merlin139
    Merlin139 Posts: 7,259 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    edited 4 May 2015 at 6:16PM
    shavy65 wrote: »
    This might be (probably is) a stupid question but is there any way I can tell when I have a full tank of hot water?
    Cheers.

    We have the same problem.
    DW "have we got hot water today?"
    Me "did you not see the sun?"
    DW "yes but not sure if we had enough sun!"
    Me "turn the tap on and run it!"
    DW "great I can wash up"

    Most days we probably only use half a tank if we are lucky. Got used to showering in the desert! :rotfl:

    Best day of the month!

    Hawaii +

    It must have been the smiley-sw025.gifsmiley-sw018.gifsmiley-sw019.gifsmiley-sw017.gif effect

    May the Fourth be with you!smiley-sw022.gif

    Unable to use our spare leccy today as both at work!
    3.795 kWp Solar PV System. Capital of the Wolds

  • rosythfifer
    rosythfifer Posts: 92 Forumite
    Eighth Anniversary 10 Posts Combo Breaker
    Its good to see the sun back. A Hawaii .5
    2.43 from 9 x 270 Trina panels. Samil solar river 2600 inverter. Due South. 30 pitch. East coast of Scotland just North of Forth bridge.
  • Dave_Fowler
    Dave_Fowler Posts: 626 Forumite
    Part of the Furniture 500 Posts Name Dropper
    edited 4 May 2015 at 7:36PM
    shavy65 wrote: »
    Thanks Eric, that`s what I thought. I have a basic knowledge of electronics, assuming I`d require a resistor in series with the lamp, any advice on size?
    You could get something like this: http://cpc.farnell.com/pro-elec/9228n/fused-spur-unswitched-with-neon/dp/PL09226. It would be complete and ready to put into a standard surface mounted box. I should imagine most DIY stores would have them in stock too.

    A plain neon lamp usually has a 1/4W 470k Ohm resistor in series with the neon bulb.

    Dave F
    Solar PV System 1: 2.96kWp South+8 degrees. Roof 38 degrees. 'Normal' system
    Solar PV System 2: 3.00kWp South-4 degrees. Roof 28 degrees. SolarEdge system
    EV car, PodPoint charger
    Lux LXP 3600 ACS + 6 x 2.4kWh Aoboet LFP 2400 battery storage. Installed Feb 2021
    Location: Bedfordshire
  • Oscargrouch
    Oscargrouch Posts: 4,393 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    Thank you, Oscar. Lego and I suffered the same issue, but the problem did not repeat itself. I wonder now whether there was a core network outage (possibly BT) at that time.

    Out of interest, would you PM me your set up details? These to include how Wattson Anywhere differs, if at all, from your Holmes data; also what your cycle of transmission your transmitter works on and how your transmitter is wired.

    Per sacly A/an Hawaii today....smiley-sw018.gif.....coffee.gif
    2.5 kWp PV system, SSW facing, 45 Deg Roof. ABB Inverter, Monitor: 'Wattson'.
    Reg. for FIT Nov 2011. "It's not what you generate; it's how you use it that matters". One very clean Vauxhall Diesel Sri, £30.00 Road Tax: B)

    Definition of 'O's = kWh/kWp (kWh = your daily & accurate Generation figure) (kWp = the rated output of your PV Panels).
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