Renewables: "talking 'bout my generation"

tunnel

ajbell wrote: »

Tomorrows weather forecast says i will get around 4 hours of solid sunshine midday as well as a bright morning.

And you believe that?

EricMears

ajbell wrote: »

Tomorrows weather forecast says i will get around 4 hours of solid sunshine midday as well as a bright morning.

I really hope you (and they) are right but not holding my breath.


10am Sunday : Sun shining, clear sky almost a kW being generated. Maybe ajbell's forecasters got it right for once ?

MarkBargain

I haven't posted on here before, why are kWh called Os?

I have a 12 panel system with 8 panels facing south east and 4 panels south west. They generated 1.17 kWh today and have made over 1 the last four days so not as low as some on here despite not really seeing the sun.

edwink

MarkBargain wrote: »

I haven't posted on here before, why are kWh called Os?

I have a 12 panel system with 8 panels facing south east and 4 panels south west. They generated 1.17 kWh today and have made over 1 the last four days so not as low as some on here despite not really seeing the sun.

Hi

Welcome aboard the nut house

Take a look at Oscargrouch's signature for the definition of O's.

Edwink

ajbell

He didnt ask for the definition he asked why.
I dont know but i would guess that it represents a way of directly comparing the output of different sized systems.

Oscargrouch

MarkBargain wrote: »

I haven't posted on here before, why are kWh called Os?

I have a 12 panel system with 8 panels facing south east and 4 panels south west. They generated 1.17 kWh today and have made over 1 the last four days so not as low as some on here despite not really seeing the sun.

Welcome Mark, Long History, don't go there, but it is the best way of making a reasonable comparison between large and small systems. Check out the O's of the massive field panel systems and you may find that you do better than they do...

MarkBargain

Oscargrouch wrote: »

Welcome Mark, Long History, don't go there, but it is the best way of making a reasonable comparison between large and small systems. Check out the O's of the massive field panel systems and you may find that you do better than they do...

But a kWh is a kWh, regardless of the size of system, so I just wondered why we call them Os on here. O for 'Output'?

tunnel

MarkBargain wrote: »

But a kWh is a kWh, regardless of the size of system, so I just wondered why we call them Os on here. O for 'Output'?

It's a long story as to what an O is but It's not a kWh, an O is your daily generation divided by your system size.


An example would be 2kWh(daily production)/4kWp(usual system size) would give 0.5 O's
Or 20kWh/4kWp is 5 O's(or an/a Hawaii as we like to call them)

Sterlingtimes

Our Os at pvoutput.org are called "Efficiency" and are mapped. Efficiency is shown on the graph y axis as kWh/kW.

http://www.pvoutput.org/list.jsp?id=41615&sid=38020

EricMears

Sterlingtimes wrote: »

Our Os at pvoutput.org are called "Efficiency" and are mapped. Efficiency is shown on the graph y axis as kWh/kW.

http://www.pvoutput.org/list.jsp?id=41615&sid=38020

However, the term 'efficiency' is also (and I suggest more justifiably) used to describe the amount generated as a percentage of total insolation. Having two different properties with the same name seems somewhat confusing !