Meaningful Units on graph scale for Water and Gas

By default when you check your water usage it goes to l/day
In my case on the graph this shows as example today 3,727 litres. This is what PVOutput see's and logs as well. :(
If you change the Unit to litres or cumulative the reading becomes accurate, 39L, at least on the Flukso site untill you refresh or reopen the page.
Can one of these be made the default instead of the miss reading one as above?
In the case of water I find the cumulative scale the best to show usage as you can take 2 points to estimate usage.

Similar for Gas.

Thanks Baz

Ryton's picture

Yes, having a "preferred visualisation unit" stored per sensor would be a nice feature.

Actually, for water I would find a "l/hr" or "m³/hr" even more usefull, than the current l/minute.

For gas, as 1 m³ of gas (roughly) corresponds to 10kWh, it would make sense to add a "kW" label (equal to 0.1m3/hr), and in addition to the "liter cumulative", add "kWh cumulative" (10 kWh/1000 l => 0.01 kWh/l)

Fluc's picture

I agree with this, for water and gas it is also more nice to see the cumulative by default.
@RYTON: the energy in kWh of 1m³ of gas depends on the richness of the gas that burns. For the last year i saw on the gas bill the factor 11,57 kWh/m³, years ago it was even 13 kWh/m³, depending of the region and source of gas. So, i think it will not be accurate for everybody.

icarus75's picture

l/min for water will almost always result in very small integer values. Hence the choice for l/day. It's just a unit that allows us to get decent integer values, that can easily be compared across the different time scales.

michi's picture

l/day is a common measure that's used by statisticians and the like (at least here in Australia). If you look up water consumption figures, they are commonly quoted as l/day per person, or l/day per household.

Cheers,

Michi.

bazzle's picture

Ok . By shanging units..
My litre per day shows 3878 litres
Liter usage shows 40 liters
Cumulative shows incremental steps up to shown 12 hour usage.

Cumulative shows the correct readings as its used.
Straight litre shows usage correctly.

liters per day is what is strange to me.

Pix links
[URL=http://www.filepup.net/files/Ic7fN7FI1404433560.html] [img]http://static.filepup.net/150x62px.png[/img] [/URL]

michi's picture

Part of the confusion seems to be that a single line graph is used to visualise both cumulative consumption and instantaneous consumption. A better approach might be to use a combined graph, in the style used by PVOutput, where instantaneous consumption is shown as a line, and cumulative consumption is shown as area under the curve.

Michi.

bazzle's picture

Thats a good idea.
What I want to know is why the differnece in L/d 3,878 L total shown compared to cumalative as from 13 to 151L that is the correct usage. not 3878 L
Litres by time (L) works out correctly as well. Is the Unit L/Day set up correctly?