Cosy Octopus - New ASHP tarrif
@allyfish I think that Cosy ought to work well for me as I have the ability to store 27 kW/h and this could be ‘filled up’ in either (or both!) cheapest 3 hour slots each day. I could also arrange for the DHW to charge once a day during one of these slots, or even part charge twice a day whilst also setting the ASHP to boost (perhaps by 1 degree C?) during both cheapest slots which should result in reduce demand for heating during the peak time. The Tesla app allows me to be ‘off grid’ in effect during all high cost periods of the tariff thus ensuring I do not consume at the maximum (and probably the medium rate too) rates of the tariff. Haven’t heard back from Octopus about swapping to Cosy yet - but I’ll be ready to re-set the devices when I do! Regards, Toodles.
Toodles, heats his home with cold draughts and cooks food with magnets.
Octopus' latest version of Cosy tariff now includes a third low rate tariff period from 10pm-12am. Added to the two 3hr periods 4am-7am and 1pm-4pm, that's 8hrs a day of low rate tariff.
So, having seen that Agile was not really saving me anything, due to limited 13kW battery storage and no mid-afternoon lower prices for quite some time, I've flipped from Agile back to Cosy. I think over the winter months I'll make a modest saving with Cosy if I get the charge times right and shift 85% or more of my energy import to lowest rate.
The attractive points were, first, the 3rd late night low rate period, which allows a third extra battery charge in the event we run the ASHP overnight, which we only do in very coldest weather periods, normally it is off from 9pm-4am. Second, the low rate periods being fixed, as I've got a little tired of constantly checking Agile tariff for the next day, and manually tweaking and adjusting the scheduled charging times on the oh-so-clunky Growatt Solar PV app. I'm more than happy to set and forget and let it all do it's thing.
I have also had a bit of a pantomime with Agile where there were a couple of 30 minute slots missing from Octopus' smart meter records. That resulted in late billing and them trying to bill the entire month in which the missing data occurred at flexible tariff rate. That's in their T&Cs, but as 85% of my load was imported at lower rates, it was a hugely punitive. After some wrangling, Octopus Customer Service applied what they said was a 'discretionary credit' to my account, but what I assert was an unfair and wholly disproportionate billing estimate for the missing data.
Maybe I'll flip back to agile over the summer, to take advantage of the lower daily standing charge. During the summer I'm largely self-sufficient with a modest 3.6kW solar array, and my only outgoing is standing charge. I don't need to import much at all. Good that you can just flip smart tariffs on a whim with Octopus, and it's instant. Fair play to them.
@allyfish I changed to Cosy from Agile on July 1st. and for very similar reason; the faff factor does have a value! I’ve been monitoring the ‘average off-peak’ rate for Agile and nearly all days have actually been higher than the known, fixed amount charged during those 8 ‘cosy’ hours on the Cosy tariff. I’m staying with Cosy at present - even though it rose 10% on Oct. 1st. Regards, Toodles.
Toodles, heats his home with cold draughts and cooks food with magnets.
- 26 Forums
- 2,221 Topics
- 49.3 K Posts
- 153 Online
- 5,881 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: What crazy nonsense are inverter limits and why are they imposed?
With my dno, there's a portal with accounts etc and som...
By Batpred , 8 minutes ago
-
RE: Odd noise in our Ideal Logic ASHP
I love (and will use) that analogy!
By JamesPa , 55 minutes ago
-
RE: Low COP and unevenly heated rooms with 12kW Samsung AE120MXTPEH / AE260TNWTEH
Where is the noise coming from. If its the pump then p...
By JamesPa , 58 minutes ago
-
RE: How good is the app support for your heat pump?
I am currently refining my own smart controller for my ...
By Grantmethestrength , 1 hour ago
-
RE: Should Our Water Circulation Pump Be Configured to Run All The Time?
@kenbone thanks for this input. It sounds like a bette...
By GrahamF , 2 hours ago
-
RE: New Fogstar 15.5kWh upright solution
Thank you. The way that framework splits between 1 an...
By Batpred , 9 hours ago
-
The Mars and Richard Kitchen Show
Just stopping by to say: 1) Mars I'm so sorry that yo...
By Lucia , 11 hours ago
-
RE: Grant 13kW Aerona3 - issues getting zones to temp
Thanks both. I’ll push gor thr glycol, 5% is 5% i cant ...
By Crimson , 11 hours ago
-
RE: Automation options to maximuse efficiency & ToU tariffs
If you are asking what is available to the non geek hou...
By JamesPa , 13 hours ago
-
Yes, you make a good point and beyond servers, engineer...
By Batpred , 14 hours ago
-
RE: Isolating the system for a planned power cut
Insurance helps and when adding high powered devices li...
By Batpred , 16 hours ago
-
RE: Electricity price predictions
Without getting too much into politics, given that the ...
By Batpred , 21 hours ago
-
UK Consumer Law Reality Check (for anyone dealing with ...
By DREI , 21 hours ago
-
@dgclimatecontrol Thanks... this was resolved back in M...
By Sandman1600 , 22 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
That's the problem with the UK, in comparison with Amer...
By DREI , 23 hours ago
-
Electrical is the only way forward.. But until we get...
By Batpred , 23 hours ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Manufacturer: Panasonic Model: WH-WXG12ME8 Type: AS...
By Andy-e , 23 hours ago
-
In our installation, we actually have an LLH but any di...
By Toodles , 23 hours ago
-
RE: Large heat pump options for church building
This church project has more in common with a commercia...
By GrahamF , 23 hours ago
-
RE: External wall insulation - your experience
So our house is in SE England. We mainly had mixed w...
By Batpred , 1 day ago