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Renewables: "talking 'bout my generation"
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Hi guys, I wonder if I could get opinions....
My system is 4.48Kwp and on the 6th it was almost the perfect day, mostly uninterrupted sunshine all day, yet I never got more than around 3.6Kw but the next day as you can see I got around 4.3Kw when the sun came out just after 15:00, my assumption is that the trough between 12:30 and 14:30 involved rain but I wasn't in so I don't know. Also on the 6th the generation is significantly lower at around 12:00 (the step up at 13:00 is normal because my neighbour's house is staggered from mine and their roof casts a shadow over the array in the morning).
What I'm wanting to know is why I only got 3.6Kw on the 6th....any ideas?0 -
One thing to remember is that temperature has an affect on generation. The output at 35 °C will be significantly less than 25 °C for example (and it's not the air temperature that matters, it's the panel temperature, which will be quite a bit higher in direct sunlight). That probably doesn't explain your numbers but it is always worth considering.M0ney said:What I'm wanting to know is why I only got 3.6Kw on the 6th....any ideas?2kWp Solar PV - 10*200W Kioto, SMA Sunny Boy 2000HF, SSE facing, some shading in winter, 37° pitch, installed Jun-2011, inverter replaced Sep-2017 AND Feb-2022.4 -
A good first week of August with a daily average of 5.04 Os, well above PVGIS.2kWp Solar PV - 10*200W Kioto, SMA Sunny Boy 2000HF, SSE facing, some shading in winter, 37° pitch, installed Jun-2011, inverter replaced Sep-2017 AND Feb-2022.4
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Our system's currently running at about 85% of max power and it's 21°C with not a cloud in the sky.
Scott in Fife, 2.9kwp pv SSW facing, 2.7kw Fronius inverter installed Jan 2012 - 14.3kwh Seplos Mason battery storage with Lux ac controller - Renault Zoe 40kwh, Corsa-e 50kwh, Zappi EV charger and Octopus Go5 -
Second worst day of the month but still a good haul at 3.98 O's.
East coast, lat 51.97. 8.26kw SSE, 23° pitch + 0.59kw WSW vertical. Nissan Leaf plus Zappi charger and 2 x ASHP's. Givenergy 8.2 & 9.5 kWh batts, 2 x 3 kW ac inverters. Indra V2H . CoCharger Host, Interest in Ripple Energy & Abundance.5 -
Best day since 25th June, 6.8 O's. 🔆🏖️
Pulls us back up to 110% for the month (predicted). 👍Scott in Fife, 2.9kwp pv SSW facing, 2.7kw Fronius inverter installed Jan 2012 - 14.3kwh Seplos Mason battery storage with Lux ac controller - Renault Zoe 40kwh, Corsa-e 50kwh, Zappi EV charger and Octopus Go5 -
4.225 O's here today👏👏16 Sanyo Hit 250s.4kWp SMA 3.8kWp inverter. SW roof. 28° pitch. Minimal shade. Nov 2011 install. Hybrid car. Ripple Kirk Hill. N.E Lincs Coast.5
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A most gratifying day with A/an
+ 1.000 O's..
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:
Definition of 'O's = kWh/kWp (kWh = your daily & accurate Generation figure) (kWp = the rated output of your PV Panels).4 -
My feeling is that it's pollen which made a fine film of dust which was then washed off when I then got up to around 4.4Kw again....not sure if that's right but it did achieve over 4Kw today again, can't say much about the weather at home today again as I'm not at home though....4.598Os again, so not bad. 🙂KevinG said:
One thing to remember is that temperature has an affect on generation. The output at 35 °C will be significantly less than 25 °C for example (and it's not the air temperature that matters, it's the panel temperature, which will be quite a bit higher in direct sunlight). That probably doesn't explain your numbers but it is always worth considering.M0ney said:What I'm wanting to know is why I only got 3.6Kw on the 6th....any ideas?2 -
Got a lovely 4.46 O's yesterday and month end prediction ticking along at a modest 103%. Year end still on course for best ever at ~110%.Mart. Cardiff. 8.72 kWp PV systems (2.12 SSW 4.6 ESE & 2.0 WNW). 20kWh battery storage. Two A2A units for cleaner heating. Two BEV's for cleaner driving.
For general PV advice please see the PV FAQ thread on the Green & Ethical Board.5
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