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	RE: Never mind the OAT… By Toodles, 11 minutes ago Forum Solar Photovoltaic (PV)
	@deltona Not quite! We had a system installed by BG about 20 years back; the installers left the boiler set to the manufacturer’s default setting of ~18 kW and the control function was a single contro...
	RE: Setback savings - fact or fiction? By cathodeRay, 18 minutes ago Forum Air Source Heat Pumps (ASHPs)
	I have just tried a program called Visipics (olden but golden...) on nine manually grabbed 24 hour period images and using loose match criteria, it matched these two images: Attachment : im...
	RE: Setback savings - fact or fiction? By JamesPa, 27 minutes ago Forum Air Source Heat Pumps (ASHPs)
	I completely agree, just sounding a note of caution! I cant think of a reason why it would matter but, that said, when I did something similar (I cant remember exactly what and it may even have been ...
	RE: Setback savings - fact or fiction? By cathodeRay, 28 minutes ago Forum Air Source Heat Pumps (ASHPs)
	Always my preference too, but I fear it is going to be too simple! I first considered much the same as you did, min, max, mean, standard deviation (though strictly speaking meaningless, but nonetheles...
	RE: Setback savings - fact or fiction? By JamesPa, 36 minutes ago Forum Air Source Heat Pumps (ASHPs)
	Somehow Google matches images, but I suspect the techniques are quite sophisticated. Building on @majordennisbloodnok suggestion could it be as simple as average temps equal to within (say) 2C AND Max...
	RE: Setback savings - fact or fiction? By Majordennisbloodnok, 59 minutes ago Forum Air Source Heat Pumps (ASHPs)
	My preference would be to keep it simple. I'd say that if two days share similar maximums, minimums and averages then it's a close enough profile. The peaks and troughs may have occurred at different ...
	RE: Never mind the OAT… By JamesPa, 1 hour ago Forum Solar Photovoltaic (PV)
	I think you are right. However in this case, in the UK, the money argument and the environmental argument are in perfect alignment in the medium/long term*. Whilst we remain dependent on despot stat...
	RE: Setback savings - fact or fiction? By cathodeRay, 2 hours ago Forum Air Source Heat Pumps (ASHPs)
	@majordennisbloodnok — thanks, useful to know, I will look into it.The pattern recognition problem, how to find days with similar OAT profiles, is more of a challenge. Given a profile like this, how d...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By RadWhisperer, 2 hours ago Forum Air Source Heat Pumps (ASHPs)
	I found because I have very low heat loss I can set back the temp by only 1C during the higher rate periods because the Daikin overshoots 1-1.5C regardless. The HP rarely starts again until the next "...
	RE: Need Help Optimising My Rushed ECO4 Install: 12kW Bosch Heat Pump By Old_Scientist, 8 hours ago Forum Air Source Heat Pumps (ASHPs)
	Welcome @mickamills We too have an oversized 12kW Samsung heat pump installed on the ECO4 scheme. We cannot run continuously until outside temps fall to around 5C or below. In milder weather (10-15C)...
	RE: My Powerwall 3 Consumes 3-4 kWh/Day in Self-Consumption: Is This Normal? By Old_Scientist, 9 hours ago Forum Energy Storage
	@caron I can confirm that the power usage of the PW3 is quite high, and I was initially quite shocked at how high. Others have noted similar in discussions around the internet. The weeks before our Ju...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By Old_Scientist, 9 hours ago Forum Air Source Heat Pumps (ASHPs)
	Looking at your figures, I'm guessing you'd ideally need around 13.5-15kW of usable charge as an absolute minimum for a tariff like Cosy. That higher usage in the 7am-1pm slot often receives a little ...