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Renewables: "talking 'bout my generation"
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I am new to the pv ownership club so please go easy on me. I have 4kW panels ssw facing, no shading. Inverter is 3.6kWh I have a wattson fitted by the installer. I was concerned that my max generation seemed low peaking at about 2.7kwh over the bank holiday but totlal generation seems to compare fine with what other memebers are generating. (25,25 and 27kw over the bank holiday). I have now noticed that the low peak generation figures taken from the wattson software (Holmes) may be due to an inaccuracy in the wattson/Holmes readings as the wattson appears to be about 25% inaccurrate - it recorded 22 kW generation on Monday when the "official" meter indicates 27kW generated. Has anyone else experienced large wattson inaccuracies.0
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John_Pierpoint wrote: »Oh these pedantic people who correct other people's spellings, don't you just love 'em.;)
Welcome to the Essex chapter of the club.
Think an O's as opposed to the o's may also be appropriate.....
I am new to the pv ownership club so please go easy on me. I have 4kW panels ssw facing, no shading. Inverter is 3.6kWh I have a wattson fitted by the installer. I was concerned that my max generation seemed low peaking at about 2.7kwh over the bank holiday but totlal generation seems to compare fine with what other memebers are generating. (25,25 and 27kw over the bank holiday). I have now noticed that the low peak generation figures taken from the wattson software (Holmes) may be due to an inaccuracy in the wattson/Holmes readings as the wattson appears to be about 25% inaccurrate - it recorded 22 kW generation on Monday when the "official" meter indicates 27kW generated. Has anyone else experienced large wattson inaccuracies.
Welcome; I think you will find that your Wattson transmitter (if powered via batteries) is set to a slow transmission rate to the Wattson Monitor (to save battery usage). My transmitter is set for an every 3 second rate, powered from mains adapter. I currently get a +/- 4% accuracy, when generation is low it's + % when Generation is high it's - %. The quicker the transmission rate, the more accurate the monitor will be.
0.88 O's today......:( :mad: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).0 -
Thanks. Is running on batteries. Will check transmission rate. Although I thinks rate is quite frequent as reading updates every few seconds.0
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0.95Os/3.9kw today0
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0.95Os/3.9kw today
Other thing worth a check is make sure that you are running the latest version of Holmes software..(Holmes2)
Your O's were 0.975 (3.9kW/4kWp) bye the bye... 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).0 -
Still on me jollies here, looks like its gone downhill fast from the weekend. I'll still console myself that my "house" is still only using less that baseload(fridge & freezer)
PVnewbie, 25-27kWh per sunny day aint nowt to be sniffed at:D2 kWp SEbE , 2kWp SSW & 2.5kWp NWbW.....in sunny North Derbyshire17.7kWh Givenergy battery added(for the power hungry kids)0 -
4kWh yesterday :eek:
No wonder I had to pay to top up the hot water...!
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Only 1.02 O's yesterday.
Strong winds, very cold with rain.....well it is almost summer:D
More of the same today. 200W at 9.00am
Note to Oscar. Bought a Wattson off fleabay;)
Sunny Beam is going!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.0 -
Martyn1981 wrote: »Exactly the same here. Got 8 today (1.4 O's), pretty much hitting May target. If we get average for last 3 days, then we'll be about 10% over, but today and tomorrow not great, Friday looks nice, so perhaps 5% over.:cool:
Mart.
Hoping that fellow PV'ers will understand this, but yesterday and today got 'that weather' the type that looks pretty miserable, but the TGM's just keep on clocking units. So against targets of 20, actually got 17 yesterday, and looking similar (perhaps 15 today). So not bad at all.
Topped 600kWh's (in a single month) for first time ever, add in the 30's and not sure if there are any more targets (even if they are meaningless and made up) left to hunt! Perhaps 10MWh's, but that's another year away.
Mart.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.0 -
Martyn1981 wrote: »So against targets of 20, actually got 17 yesterday, and looking similar (perhaps 15 today). So not bad at all.
Mart.
Are we talking O's above ? 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).0
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