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Low Efficiency from Panels - What Numbers Should I be Seeing?

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Comments

  • Nsar1
    Nsar1 Posts: 53 Forumite
    Fifth Anniversary 10 Posts
    Spoke too soon, was getting 37w about an hour ago. 
    Back to installer and yet another email to Sunsynk. Got to say I wouldn't recommend them to anyone.


  • JKenH
    JKenH Posts: 5,379 Forumite
    Seventh Anniversary 1,000 Posts Name Dropper
    Nsar1 said:
    Spoke too soon, was getting 37w about an hour ago. 
    Back to installer and yet another email to Sunsynk. Got to say I wouldn't recommend them to anyone.


    Could be the weather?
    Northern Lincolnshire. 7.8 kWp system, (4.2 kWwest facing panels , 3.6 kWeast facing), Solis inverters installed 2018, 5kW SSE facing system (shaded in afternoon) added in 2025 with Tesla PW3 battery, Mitsubishi SRK35ZS-S and SRK20ZS-S Wall Mounted A2A Heat Pumps, ex Nissan Leaf owner.
  • 2nd_time_buyer
    2nd_time_buyer Posts: 807 Forumite
    Part of the Furniture 500 Posts Name Dropper Combo Breaker
    edited 6 December 2022 at 5:23PM
    JKenH said:
    Nsar1 said:
    Spoke too soon, was getting 37w about an hour ago. 
    Back to installer and yet another email to Sunsynk. Got to say I wouldn't recommend them to anyone.


    Could be the weather?
    You don't have any aerials, chimneys, wires etc. overhanging any of the panels I assume? Must admit it sounds like something is not quite right, we reached 60% of peak output today on our SE/SW system
  • Nsar1
    Nsar1 Posts: 53 Forumite
    Fifth Anniversary 10 Posts
    2nd_time_buyer said:
    JKenH said:
    Nsar1 said:
    Spoke too soon, was getting 37w about an hour ago. 
    Back to installer and yet another email to Sunsynk. Got to say I wouldn't recommend them to anyone.


    Could be the weather?
    You don't have any aerials, chimneys, wires etc. overhanging any of the panels I assume? Must admit it sounds like something is not quite right, we reached 60% of peak output today on our SE/SW system
    Lovely sunny day all day long. No shadows whatsoever on the roof.
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