3KW peak on 4kwh system in this Sunny weather..is there a fault?

[FB.]

Well its over 30deg here in sunny/cloudy Cheshire today and the system is peaking higher today, then in the past few days, so i just think its not that much to do with temperatures, but more to do with the actual irradiation from the Sun

Blimey! 30'C in Cheshire.
It's only about 26'C here in Cambridgeshire, which goes to show just how dull, wet and cold spring we had here that still appears to be spoiling the weather (cool, wet ground still coolng the air and causing mist which blocks the sun); we're normally one of the warmer, sunnier, drier parts of the country. It's usually so mild and sunny that figs and grapes usually grow well outdoors here. But this year is a shockingly bad one.

 

[Gary K]

Blimey! 30'C in Cheshire.
It's only about 26'C here in Cambridgeshire, which goes to show just how dull, wet and cold spring we had here that still appears to be spoiling the weather (cool, wet ground still coolng the air and causing mist which blocks the sun); we're normally one of the warmer, sunnier, drier parts of the country. It's usually so mild and sunny that figs and grapes usually grow well outdoors here. But this year is a shockingly bad one.

You see mist everywhere-sure your glasses don't need cleaning? LOL

 

[danesol]

Well I knew I shouldnt of said that last comment ( edging my bets ) as at lunchtime the weather went to pot, the clouds appeared everywhere and now seems ready for a real down pour .....

 

[langstroth2]

I was concerned about this as well - max 3.2kw peaks with our 4kw system.

However PVOutput put my mind at rest - if i look at a number of similar sized systems local to us they are all peaking at between 3.1 and 3.4kw, even the sanyo ones which typically peak at @200kw more, as expected.

e.g 26th May (Sat) - our 4kwp system peaked at 3240w. Nearby sanyo 4kwp system peaked at 3468w

 

[turbine ted]

I washed my panels on saturday, the guy up the road had been cutting flag stones with a stihl saw, so they were covered in dust. 3.57 kWp system, producing 2.9 kW at midday, after rinsing with cold water the power output went up to 3.1 kW, which then settled back down to 2.9 kW within about 5 mins.

So, the layer of dust on the panels made little difference, but cooling the panels did!