Dunkelflaute?
Not seen a great deal of sun this year, plenty of named gales over the last winter and spring but now….Dunkelflaute!!! I’ve noticed that even using OE’s Agile tariff, I frequently have to pay more for grid power than I get for my export to grid. Now, this is not a situation with which I wish up to put with.!!!! Come on sun - how about sharing your lovely rays with the S.E. Of England please? Concerned Toodles.
Toodles, heats his home with cold draughts and cooks food with magnets.
Sounds like you need to move to sunny Wales @toodles – glorious blue skies for most of today.
And thank you for adding a new word to my vocabulary today. Now, if only we could find a way to brighten up this dunkelflaute of a situation.
Get a copy of The Ultimate Guide to Heat Pumps
Subscribe and follow our Homeowners’ Q&A heat pump podcast
@editor Perhaps if we could run the windmills in reverse….😉
It just isn’t cricket when one has to pay as much per kWh when consuming as one receives when exporting! I don’t like to spend much time looking at the production figures and comparing them with last years, every month so far, they have been down 😒. Cool bright days from dawn to dusk is all I ask! (The rain can fall during the night thanks). Glad to have been of service with Dunkelflaute BTW.😊 Toodles.
Toodles, heats his home with cold draughts and cooks food with magnets.
The Met Office seem to be hopeful for our area tomorrow though😊
Toodles (now where did I put those sunglasses?
Toodles, heats his home with cold draughts and cooks food with magnets.
@editor As we all know, RHH always strive to educate, entertain and inform so… may I suggest browsing to: gridx.ai for some enlightenment? Regards, Toodles.
Toodles, heats his home with cold draughts and cooks food with magnets.
I fear to report that tomorrow is another one of those Dunkelflaute situations as I note that Octopus wish me to pay more than my export rate for even the cheapest of the 48 Agile half-hours - I mean 15.24 pence per kWh!!!? This really isn’t cricket - so it is a good job that the Powerwall battery is fully charged and that we may see a little sunshine if we are lucky! Harrumph of SE England.
Toodles, heats his home with cold draughts and cooks food with magnets.
During October I have frequently run out of battery in the late and sometimes early evening. This is caused by the dunkelflaute weather - overcast, windless, gloomy, dark - even though the batteries are at 100% at 7:00 am
although it isn’t very cold, I think this might be the worst time/weather for Solar? The heat pumps need to work (house is 1 to 1.5 kw) as temperature is below 13deg - but when the daytime temperature is much lower, there tends to be more sun?
I also think this is where a tariff giving 3 windows of cheap-ish electricity might help - but that would cycle the batteries a lot.
on these days I would like to divert to the car battery when the house ones dry up - but this is still too complicated and expensive (new wall box, phase synchronisation etc). Maybe another battery !
Vehicle to Home capability would certainly help a lot! I noticed that Sigenergy batteries have this as an option now.
House-2 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60
@bontwoody The extra battery capacity is the solution for me; no EV anyway but, originally, I had one Powerwall (13.5 kWh) as I could not worm a second battery out of anyone due to post-Covid shortages. When I doubled the battery capacity to 27 kWh., I found that the Daikin ASHP could be kept running with Octopus Energy’s Cosy tariff. Three periods of 3, 3 and 2 hours each day ensure that I do not stray into the middle price rate from the grid at any time. Of course at the time of year solar is at its’ lowest output, heating consumption is at its’ greatest! Storage works for me anyway! Regards, Toodles.
Toodles, heats his home with cold draughts and cooks food with magnets.
- 26 Forums
- 2,255 Topics
- 50.3 K Posts
- 838 Online
- 5,918 Members
Join Us!
Podcast Picks
Latest Posts
-
The same has been claimed of my sister-in-law's cooking...
By Majordennisbloodnok , 31 minutes ago
-
RE: Mitsubishi Ecodan R290 10kW performance
@jamespa I agree, I have the installer visiting tomorro...
By Ecoste , 2 hours ago
-
RE: Are We Sleepwalking Into Another Race to the Bottom?
@jamespa Yup! 😉 Toodles.
By Toodles , 2 hours ago
-
RE: Grant 13kW Aerona3 - issues getting zones to temp
And just when I think great they’re coming next week to...
By Crimson , 2 hours ago
-
RE: Very Much Awake – Renewing the Heating Industry One Step at a Time
I feel that that attitude shared by Aadil from Heat Gee...
By Toodles , 3 hours ago
-
RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus
I have recently gone through the whole process. I got q...
By debT , 5 hours ago
-
RE: Electricity price predictions
I suspect it's because housebuilders have lobbied/told ...
By JamesPa , 5 hours ago
-
RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters
and we have some of the strongest tidal flows anywhere ...
By Old_Scientist , 5 hours ago
-
RE: Midea ASHP – how to set weather compensation
@pash44pump - as I said yesterday, see if you can get i...
By cathodeRay , 6 hours ago
-
RE: Radiator Sizing Dilemma: Vertical vs Type 33 for Low-Temperature Heat Pump Systems
This looks OK. Overall you have roughly the right amoun...
By Old_Scientist , 6 hours ago
-
RE: How can I programme a setback for my Samsung Gen6 8kW heat pump?
I'm not familiar with Hive thermostats/controllers, but...
By Old_Scientist , 6 hours ago
-
RE: PV Panels on roof in Conservation Area
Oh I see, I thought that there might be some sort of ga...
By JamesPa , 10 hours ago
-
RE: Testing new controls/monitoring for Midea Clone ASHP
Thanks @grantmethestrength and @cathoderay . The reas...
By benson , 20 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
@jamespa mine seems changing albeit not by much, 3.21, ...
By AdamK , 1 day ago
-
@majordennisbloodnok The migration hasn't started in th...
By HCas , 1 day ago
-
RE: Buying large amp bidirectional RCD and RCBO
There won't be many RCBOs with a 100mA trip rating beca...
By Transparent , 1 day ago
-
RE: One room is colder than the rest of the house
@jamespa thanks for all the advice. Just so you know, ...
By AndrewJ , 1 day ago
-
RE: Daikin Octopus installation update - I saw my first defrost. 😍😂
My MMI is in the loft but I checked the pump flow rate ...
By RadWhisperer , 1 day ago
-
RE: Grant Aerona 3 and Drayton system questions
Good man/woman that plumber! Very likely....
By JamesPa , 1 day ago




