PV without battery storage?
@heat-pump-newbie If you have something like an iBoost and the ability to rearrange your consumption, you can consume a large part of your generation. I manage ~75%.
One problem is if the iBoost is retrofitted to a conventional tank with a top element only. That limits me to around 6 kWh before the top of the tank is entirely heated. I circumvent that by doing laundry in late morning and filling the washing machine drum with hot water to free up capacity. This trick also allows me to use cheaper gas heated water in the washing machine in winter rather than have the washing machine element heat the water.
The other trick is to dry washing indoors on racks in the conservatory while also running a dehumidifier. For each kWh I consume dehumidifying, I condense 2 kWh worth of water from my measurements and also avoid dumping the energy straight out of the house like with a tumble dryer so it serves as space heating. (I find running it in continuous mode gets better energy efficiency).
A reason I am considering batteries now is that diversion has only gained me the price of gas (which was around 3-4 p/kWh but much higher now) rather than its value as electricity.
- 22 Forums
- 2,032 Topics
- 44.3 K Posts
- 19 Online
- 3,237 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: Agile: average import cost vs other tariffs?
@toodles thanks for the analysis. I'll be really intere...
By Old_Scientist , 3 hours ago
-
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW
Welcome to the forums. It’s clear that you’ve taken t...
By Mars , 4 hours ago
-
RE: help sizing rads based on room by room heat loss
By JamesPa , 4 hours ago
-
Hi Thanks for the reply, the walls are being constru...
By Fingers , 5 hours ago
-
RE: ASHP Ecodan L9 error - No Heating but Hot Water
@phoenix15 I'm no plumber so please don't take this as ...
By dnagre , 6 hours ago
-
RE: Is this normal? Click of the DHW returning to space heating
@grantmethestrength Oh sorry to hear that, there should...
By ASHP-BOBBA , 11 hours ago
-
@ashp-bobba TBH the ladies are rather disorganised, so ...
By Cathyem1 , 11 hours ago
-
The Rise and Fall of Europe’s Most Generous Green Subsidy
This story came to my attention thanks to Graham Hendra...
By Mars , 11 hours ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
And for those of us without an automatic irrigation sys...
By Majordennisbloodnok , 11 hours ago
-
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's
From the Full SAP Report: Space heating requirements:...
By trebor12345 , 11 hours ago
-
Logically, the lower frequency = more gentle, yes, but ...
By SUNandAIR , 15 hours ago
-
RE: Ideal Logic ASHP - change from 55°C to 35°C Heating?
Good point. I’ll keep my eye on the manifold temperatur...
By Tomdad , 18 hours ago
-
RE: How hard and expensive would it be to change panel and add battery?
@transparent It is a setting that Octopus make via the ...
By Toodles , 18 hours ago
-
RE: Performance of Heat Pumps in Mild Weather
@heatgeek The flow rate isnt controlled by Mitsub...
By RobS , 21 hours ago
-
RE: Say hello and introduce yourself
I might put a couple of speakers in the ceiling if fund...
By Fingers , 1 day ago
-
RE: Bathroom Radiator replacement
@rob-nezard can you please offer your professional advi...
By Mars , 2 days ago
-
-
RE: Questions on my Hitachi Yutaki SCombi Heat Pump
OK, thats good and low. With low flow temperatures lik...
By JamesPa , 2 days ago
-
RE: Help me keep the faith with my air source heat pump installation
@jamespa “They are all equal but, some are more equal t...
By Toodles , 2 days ago
-
RE: Is it KISS or constant – weather compensation vs. set flow temperature?
@cliffhanger Mine has a 'space heating off' setting! O...
By JamesPa , 3 days ago