Thanks for the answers guys, some things to ponder.
Chris - I did email CC some months ago. It's fine you gave full
answers. , I guess I had assumed that gas and water monitoring would
come out pretty quickly after the CC128 emerged.
PV is tricky. CC128 does work with PV in that I can clamp the AC
output from the PV and get reasonably accurate readings ( I do have a
remote display from my invertor and they are within 10% of each other)
The requirement is for the monitor to figure out and display if the
output from PV is exceeding the input from the grid. At present I can
do this by some mental arithmetic and a "gut" feeling for whats on in
What I need is a red light/green light type system that tells me when
I'm producing more than I'm consuming. If I could chart this over time
(and weather conditions) I could plan my usage better. With PV systems
in the UK it's more economic to use the excess yourself (charged 13p
per unit) than sell it to the grid (paid 3p per unit), in other words
treat it as a kind of shifting economy tariff
The trouble is that when I measure my houshold consumption it cannot
figure out wether I am net exporting or importing. Clearly if the
output of the PV is a lower figure than the household I',m not net
On Jun 29, 9:47 am, Paul Tanner <p...@virtual-techno.com
> Hi Jonathan,
> CurrentCost is a great packaged solution for people who want to
> monitor a conventional whole-house electrical setup. They are also
> adding IAMs to monitor individual appliances and will support these
> on their "bridge" interface to a web-based control panel.
> A lot of us have broader requirements better suited to our own
> solutions or the one Ken mentions below (which looks extremely good
> although I have not tested it). If you want a comprehensive solution
> including PV, gas etc there is, as yet, no off-the-shelf product to
> do it. If you have the (basic software and electronics) skills then
> by all means join us on our journey.
> BTW. for PV you should monitor DC anyway, so you would be better off
> with a shunt rather than current clamp. This with a clamp for the
> overall AC current flow should give you the complete picture.
> At 08:27 AM 6/29/2011, Ken wrote:
> >The CurrentCost functionality has remained fairly standard across
> >all models, with no real major improvements.
> >Might I suggest an open source energy monitor from
> >This can be tailored for a mix of sensors, both current transformer
> >and pulse counter and has wireless and internet interfaces.
> >It is based on Arduino and Jeenodes technology, with all source code
> >available so that you can make a custom version which can be
> >expanded as your needs increase.
> >BTW - I'm using an Arduino (Mega) to monitor room temperatures, gas
> >consumption, control the heating, solar water heater and monitor
> >outside temperatures. So there are people doing this stuff already.
> >On 29 June 2011 06:32, jives11
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> Paul Tanner - Virtual Technologies -http://www.virtual-techno.com
> Tel: +44 1494 581979
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