baseline reading?

hollie.weimeraner

I've been away for a week and thought I'd check and thought it was a good opportunity to check my baseline usage. So I've worked out I've been using .048 Kwh per hour (8.4Kwh over the 174 hours I've been away).
How does this compare with other peoples usage? (3 bed house with a fridge/freezer, router and a TV on standby - difficult plug switch access)

Martyn1981

I think that's really impressive, much better than here where it's more like 100W.

Saying that, were all those 174hrs when PV was at zero, or was that import, so possibly skewed by PV?

hollie.weimeraner

Martyn1981 wrote: »

I think that's really impressive, much better than here where it's more like 100W.

Saying that, were all those 174hrs when PV was at zero, or was that import, so possibly skewed by PV?

Ha, not thought of that, yes skewed by PV:D

Whats the best way to check the baseline then without being skewed by PV?

I suppose I could look at last weeks PV and deduct those hours of production?

Martyn1981

hollie.weimeraner wrote: »

Ha, not thought of that, yes skewed by PV:D

Whats the best way to check the baseline then without being skewed by PV?

I suppose I could look at last weeks PV and deduct those hours of production?

Hiya, how detailed is your import meter (mine only shows whole kWh's)? If it has decimals then try noting it when the PV shutdowns, and then again before it starts back up, and divide by hrs.

Or, you could probably take a logical guess at what time the PV starts and stops and remove those hours from the 174. It won't be perfect but probably close enough. Maybe on at 7am, off at 8pm, so deduct 7x13 .... or something like that.

hollie.weimeraner

Martyn1981 wrote: »

Hiya, how detailed is your import meter (mine only shows whole kWh's)?.

It shows tenths so I checked overnight and also at a rough guess after looking at when PV kicked while I've been away it appears we're using about .09Kwh per hour.

Martyn1981

hollie.weimeraner wrote: »

It shows tenths so I checked overnight and also at a rough guess after looking at when PV kicked while I've been away it appears we're using about .09Kwh per hour.

That sounds good. You could go even further and get a plug in monitor that checks the power and energy that any device uses. Pop that on the freezer or fridge/freezer for a few days and see what the total is, as that may account for a lot of the baseline, which again means it's going well. Don't do a short test as the FF demand will vary depending on when the compressor is running so you might see huge, or tiny draw over a short period. Also monitoring it just after you get back from Tesco's with a load of warm (well, not fully cold) items will through things out a bit too if you don't allow enough time for averaging.



....... God I'm so boring .....

hollie.weimeraner

Martyn1981 wrote: »

That sounds good.



....... God I'm so boring .....

Or OCD:D Well buying a monitor to check tenths of a kWh isn’t really money saving. I know the kettle and the tumble dryer and washing machine consume most energy and we won’t use them any lesss. I was just being inquisitive about the constants. Cheers