[rrd-users] help required to graph photovoltaic electricity savings

[Thomas Parvais]

Hello

thank you for this proposal.

That seems easy to implement for the RRD create and RRD update

However, I wonder if Average will be well computed as the average should be
done for the the relative period 0700-1900 or 1900-0700 and not over 24h.

We can have also real measurement = 0.

Thomas


2012/11/28 Dossy Shiobara <dossy at panoptic.com>

> On 11/28/12 8:02 AM, Thomas Parvais wrote:
> > I would like to to two new improvements, for which I'm lost:
> >
> > 1. make a difference peak-hour / offpeak hours as electricity costs
> > are cheaper between 19h00 & 7H00 and during week end. Make clear color
> > distrinction on graphs
> > 2. print on the same graph (second right axis) a new line with the
> > correspondance between energy prodution / consumption (W*h) an EURO
> > (we know i.e 1kWh costs 0.15€ off peak and 0.25€ peak)
>
> Thomas,
>
> I'd suggest using four DS:
>
> (1) PV 0700-1900
> (2) PV 1900-0700
> (3) Supply 0700-1900
> (4) Supply 1900-0700
>
> When updating the RRD between 0700-1900, record the values in the DS's
> for (1) and (3), recording zeroes as values for the other two DS'es.
> And, vice versa when the time is between 1900-0700. Make sure to record
> zeroes and not unknown ("U").
>
> Then, you can graph all four DS'es, each with their own colors.
>
> --
> Dossy Shiobara         |      "He realized the fastest way to change
> dossy at panoptic.com     |   is to laugh at your own folly -- then you
> http://panoptic.com/   |   can let go and quickly move on." (p. 70)
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