Renewables: "talking 'bout my generation"

Martyn1981

June closed at 94% of target, oh well. Year end prediction sitting at 102%.

Import was 86kWh's, export 479kWh's and total consumption 219kWh.

Gas was about 66kWh's.

1961Nick

4.4 O's yesterday.

98% of (classic) PVGIS for the month - 102.5 O's

2nd worst June.

Generation 410kWh
Import 127kWh
Consumption 499kWh
Export 9kWh
Battery discharge 179kWh

ASavvyBuyer

Martyn1981 wrote: »

June closed at 94% of target, oh well. Year end prediction sitting at 102%.

Import was 86kWh's, export 479kWh's and total consumption 219kWh.

Gas was about 66kWh's.

Worst June since install, just made 93.8% of PVGIS estimate.

Used 50.2% of Solar PV generation.

No Gas used!

KevinG

5.44 Os for the last day of June and finished at 98% of PVGIS thanks to the final four days. Of eight full Junes it's number five, so not great. 2018 was the best, 2016 the worst.

Coastalwatch

Three good days while away for the weekend taking month total to 139 O's and 104.3% of pvgis. Naturally down on last year but delighted all the same.:j

JKenH

Martyn1981 wrote: »

Import was 86kWh's ... and total consumption 219kWh.

Gas was about 66kWh's.

I am impressed by how frugal you are with your leccy even though you run an ASHP. That’s less than 3kwh per day. I would love to get down to those levels but just can’t see how?

My import (I have no means of measuring total consumption) was 183 kwh. 74 of those were over 6 bad days of PV, which I presume you also had, and the situation was exacerbated by us having a one year old (and mum) visiting for a few weeks and 14 people staying over one weekend. Taking out the 6 worst days we averaged 4.5 units a day import with a few typical good days just using 3 kWh.

Because of the toddler we had our oil c/h on for 5h 40 mins as well as running the ashps on the rainy days.

I see you used some gas - is that for DHW? We heated all our water by electric. The Iboost provided 216 kwh and I added 15kwh of E7 manually.

We cook by electric - does anyone with NG do that?

Base load is c230 watts which accounts for about 2.5 units a day (11hours non PV) and about 1.5 hrs post solar use of the plasma tv is another 600 watts a day typically in June. An LED Tv would probably save me 350/400w per day but that’s only 11kwh per month.

It’s back to a battery solution then - but maybe only a small one- say 5kwh for the evening and standard rate base load coverage would be the most cost effective and just accept there will be bad days when I need the grid. A bigger battery would be good but it seems that bad solar PV days come a few at a time so it would probably have needed to be 20 kwh to get me through the dark days this month - can I justify that for a couple of times a month? Nick1961?

Sorry if this seems more appropriate to the battery thread but it was your low import that got me thinking.

zeupater

Hi

Seemingly an average June, being somewhere between the best & worst, that's if you consider that it's <1kWh better than the worst (2012) and well over 200kWh behind last year! :rotfl: ... that'll make it the second worst then!! ..

Electricity imports around 24% up on last year at 62.5kWh, but the solar thermal system's DHW storage just about managed to cope with the worst extended dull period, so no gas used ...

HTH
Z

zeupater

JKenH wrote: »

... about 1.5 hrs post solar use of the plasma tv is another 600 watts a day typically in June. An LED Tv would probably save me 350/400w per day but that’s only 11kwh per month ...

Hi

Possibly considerably more over the year if you consider daylight hours & dull periods when the PV isn't performing well ... we replaced our main plasma TV with an efficient LED unit quite a few years ago, similar to the experience in this article ...

Energy Saving - LED: Time to replace the TV?

Don't know what your TV usage is or it's relative energy consumption against the latest generation LED panels, but it's worth doing the sums & having a think about at some stage, especially as it will eventually impact on the battery capacity you'll need to size ...

HTH
Z

Martyn1981

Hiya, I've answered within the quote.

JKenH wrote: »

I am impressed by how frugal you are with your leccy even though you run an ASHP. That’s less than 3kwh per day. I would love to get down to those levels but just can’t see how?

Previous 4 June's range from 68-79kWh's. So this one's quite naughty.

ASHP saw next to no use in June, apart from a few days air-con at the end. But it gets used largely in conjunction with PV.

My import (I have no means of measuring total consumption) was 183 kwh. 74 of those were over 6 bad days of PV, which I presume you also had, and the situation was exacerbated by us having a one year old (and mum) visiting for a few weeks and 14 people staying over one weekend. Taking out the 6 worst days we averaged 4.5 units a day import with a few typical good days just using 3 kWh.

TBH, we don't have bad PV days (in terms of leccy needed) from May to September due to the system size. Though washing machine and tumbly (our dirty secret) can push the envelope if gen is poor that day. And there are only 2 of us (plus a number of permanent and foster animals).

Because of the toddler we had our oil c/h on for 5h 40 mins as well as running the ashps on the rainy days.

I think we've gotten used to a lower temp over the years, which helps, also perhaps the 'Cardiff bowl' where surrounding hills trap heat and keep us warm, helps.

I see you used some gas - is that for DHW? We heated all our water by electric. The Iboost provided 216 kwh and I added 15kwh of E7 manually.

Our gas is GCH (not used in June), oven, and DHW (perhaps underused, I may be going feral).

We cook by electric - does anyone with NG do that?

We switched to an induction hob in 2011, brilliant. May switch to leccy oven too in the future, as Wifey enjoys cooking/baking but said that the range of double ovens (vertical) in gas is tiny, whereas the leccy options are numerous.

Base load is c230 watts which accounts for about 2.5 units a day (11hours non PV) and about 1.5 hrs post solar use of the plasma tv is another 600 watts a day typically in June. An LED Tv would probably save me 350/400w per day but that’s only 11kwh per month.

Depending on fridge and freezer cycling, I think we have a baseload of around 150W's. LED telly and LED lights.

It’s back to a battery solution then - but maybe only a small one- say 5kwh for the evening and standard rate base load coverage would be the most cost effective and just accept there will be bad days when I need the grid. A bigger battery would be good but it seems that bad solar PV days come a few at a time so it would probably have needed to be 20 kwh to get me through the dark days this month - can I justify that for a couple of times a month? Nick1961?

Personally, I think battery sizing should be aimed more at averages, as worst case will push up the size and cost, but give tiny additional returns.

Sorry if this seems more appropriate to the battery thread but it was your low import that got me thinking.

Occasional chats break out, but anything that goes on longer makes sense to switch to a thread, depends what people find interesting, and this chat does revolve around our generation I suppose, especially month end musings.

legoman62

Just pipped yesterdayHawaii+ 0.225 O's today:beer: