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7.3 kW Bi Facial Rooftop Panels: ~7 year ROI: Fact OR fiction?

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Comments

  • Solarchaser
    Solarchaser Posts: 1,758 Forumite
    Sixth Anniversary 1,000 Posts Name Dropper
    Not sure how relevant this is based on your distance from me, but my 5 year old sse 4kw system made 22kwh today.
    West central Scotland
    4kw sse since 2014 and 6.6kw wsw / ene split since 2019
    24kwh leaf, 75Kwh Tesla and Lux 3600 with 60Kwh storage
  • ASavvyBuyer
    ASavvyBuyer Posts: 1,737 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper
    Our west facing system, in South Wales, made 14.4kWh today.
  • Screwdriva
    Screwdriva Posts: 1,529 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper Photogenic
    edited 22 March 2020 at 11:00PM
    Sadly, neither is within a few miles of my address so can't really compare. Anyone in SE1, SE16 or E1W?
    -  10 x 400w LG + 6 x 550W SHARP BiFacial Panels + SE 3680 HD Wave Inverter + SE Optimizers. SE London.
    -  Triple aspect. (22% ENE/ 33% SSE/ 45% WSW)
    -  Viessmann 200-W on Advanced Weather Comp. (the most efficient gas boiler sold)

    Feel free to DM me if I can help with any energy saving!
  • Screwdriva
    Screwdriva Posts: 1,529 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper Photogenic
    Just missed my first Hawaii. 19.21 kWh today, a new high, despite power nowhere near its all time peak. A much more perfect looking curve today
    -  10 x 400w LG + 6 x 550W SHARP BiFacial Panels + SE 3680 HD Wave Inverter + SE Optimizers. SE London.
    -  Triple aspect. (22% ENE/ 33% SSE/ 45% WSW)
    -  Viessmann 200-W on Advanced Weather Comp. (the most efficient gas boiler sold)

    Feel free to DM me if I can help with any energy saving!
  • Benny2020
    Benny2020 Posts: 525 Forumite
    100 Posts Second Anniversary Name Dropper
    24.7kwh on my 4 year old 4kw system in Lincolnshire. 
  • Hexane
    Hexane Posts: 522 Forumite
    Sixth Anniversary 500 Posts Name Dropper
    Over 30kWh here on Thursday, and very nearly that on Sunday. 397kWh so far for March. Nowhere near Zone 2 though!
    7.25 kWp PV system (4.1kW WSW & 3.15kW ENE), Solis inverter, myenergi eddi & harvi for energy diversion to immersion heater. myenergi hub for Virtual Power Plant demand-side response trial.
  • Screwdriva
    Screwdriva Posts: 1,529 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper Photogenic
    Closed out March at 337 kWh total, more than double Feb's 157kWh total. 
    Graph here
    -  10 x 400w LG + 6 x 550W SHARP BiFacial Panels + SE 3680 HD Wave Inverter + SE Optimizers. SE London.
    -  Triple aspect. (22% ENE/ 33% SSE/ 45% WSW)
    -  Viessmann 200-W on Advanced Weather Comp. (the most efficient gas boiler sold)

    Feel free to DM me if I can help with any energy saving!
  • pinnks
    pinnks Posts: 1,550 Forumite
    Tenth Anniversary 1,000 Posts Name Dropper Photogenic
    Pretty much what you would expect.  My expected Feb generation is 193kWh; March is 394kWh.  In fact Feb to March is the biggest month-on-month change of the year.
  • Screwdriva
    Screwdriva Posts: 1,529 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper Photogenic
    20.62 kWh today, a new high for the triple aspect bifacial system. 
    Near perfect graph here. 
    -  10 x 400w LG + 6 x 550W SHARP BiFacial Panels + SE 3680 HD Wave Inverter + SE Optimizers. SE London.
    -  Triple aspect. (22% ENE/ 33% SSE/ 45% WSW)
    -  Viessmann 200-W on Advanced Weather Comp. (the most efficient gas boiler sold)

    Feel free to DM me if I can help with any energy saving!
  • Petriix
    Petriix Posts: 2,297 Forumite
    Ninth Anniversary 1,000 Posts Photogenic Name Dropper
    For comparison we generated 22.3kWh in Norwich today from our budget 3.42kWp system. Not a cloud in the sky.
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