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Solar panels working at night?

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My panels are still outputting 28w right now, any idea what the problem is?
Clearly they are not generating so why is my Geo monitor saying they are?
I have had my panels for 7 years and have never seen this before and this is at the same time as another problem with my iboost which is reading 400w higher than my recorded generation. Some weird stuff going on after 7 years of no problems.
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  • Krakkkers
    Krakkkers Posts: 1,295 Forumite
    1,000 Posts Second Anniversary Name Dropper
    Should add that the Geo monitor tallies perfectly with the generation meter.
  • 1961Nick
    1961Nick Posts: 2,107 Forumite
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    What type of geo monitor have you got - clamp or led pulse?
    4kWp (black/black) - Sofar Inverter - SSE(141°) - 30° pitch - North Lincs
    Installed June 2013 - PVGIS = 3400
    Sofar ME3000SP Inverter & 5 x Pylontech US2000B Plus & 3 x US2000C Batteries - 19.2kWh
  • Krakkkers
    Krakkkers Posts: 1,295 Forumite
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    edited 18 December 2022 at 7:22PM
    its an led pulse. the iboost works from a clamp.
  • Solarchaser
    Solarchaser Posts: 1,758 Forumite
    Sixth Anniversary 1,000 Posts Name Dropper
    Sounds like a potential inverter issue to me.
    Power the inverter off with the isolator and see if the wattage disappears, if not, its not the inverter. 

    Iboost could be picking up interference as its a clamp, maybe move it further along the cable and secure by tie wraoa either side on the cable so it can't slip back down
    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
  • paul991
    paul991 Posts: 451 Forumite
    Third Anniversary 100 Posts
    I have a geo monitor on a led  counter with a samil inverter some times at night it signals maximum power for a second . wondered why but not really a problem thought it could be interference with the wifi signal 
  • 1961Nick
    1961Nick Posts: 2,107 Forumite
    Tenth Anniversary 1,000 Posts Name Dropper
    paul991 said:
    I have a geo monitor on a led  counter with a samil inverter some times at night it signals maximum power for a second . wondered why but not really a problem thought it could be interference with the wifi signal 
    Have you checked the Velcro to make sure the sensor isn’t peeling off?
    4kWp (black/black) - Sofar Inverter - SSE(141°) - 30° pitch - North Lincs
    Installed June 2013 - PVGIS = 3400
    Sofar ME3000SP Inverter & 5 x Pylontech US2000B Plus & 3 x US2000C Batteries - 19.2kWh
  • Krakkkers
    Krakkkers Posts: 1,295 Forumite
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    Seems OK and have put new batteries in.
  • paul991
    paul991 Posts: 451 Forumite
    Third Anniversary 100 Posts
    yes  sensors ok and  was in a  dark room any way but by geo monitor has now been knocked off the table so now looking for a replacement . im looking for a basic monitor that works from a led sensor ,has to be cheap and idealy easy for the wife to read
  • Rheumatoid
    Rheumatoid Posts: 1,003 Forumite
    Part of the Furniture 500 Posts Photogenic Name Dropper
    I occasionally get low level generation in the dark on my geosolar monitor. It has mystified me for 7 years.
    16 Panel (250W JASolar) 4kWp, facing 170 degrees, 40 degree slope, Solis Inverter. Installed 29/9/2015 - £4700 (Norfolk Solar Together Scheme); 9.6kWh US2000C Pylontech batteries + Solis Inverter installed 12/4/2022 Year target (PVGIS-CMSAF) = 3880kWh - Installer estimate 3452 kWh:Average over 6 years = 4400 :j
  • Krakkkers
    Krakkkers Posts: 1,295 Forumite
    1,000 Posts Second Anniversary Name Dropper
    I switched the solar off and on at the fuse box and it has not happened again.
    Still got a difference between the iboost and clamp and what the generation is.
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