Are Solar Diverters Necessary for Homes with ASHPs and Solar PV?
I do the same, 250L tank heated to 47C overnight, no reheat required to get us through a normal days usage.
I've had an iBoost for 6 years. In total it tells me I've 'saved' 2400 kWh to date. For the first 4 years it did a reasonable job of heating the water during the summer leaving me with minimal gas bills. Since buying an EV two years ago then installing a Powerwall last February the amount of savings have dropped (of course). The Powerwall is charged first and then the water. Having said that today, overcast but with PV generation, the iBoost is currently heating the water. The PW is now at 100% but there is not enough PV output to warrant plugging in the car. The iBoost has more than recouped its purchase cost if you assume an average electric tariff over that time. If you use an average gas tariff then it's a moot point - however it has saved CO2 emissions. I'm on IOG so do not use the iBoost overnight. The saving is marginal. It would make no sense to have one with an ASHP - unfortunately Octopus have declined to fit one (apparently I need a 14 kWh HP and they only supply up to 11 kWh). If/when the iBoost fails I will not replace it. There would likely not be any payback during its life.
Ideal HP290 10kw heat pump, 2.99kw PV, Powerwall 2, Zappi charger, EV. Midlands location hybrid house part 1911, part 1970, part 2020s.
The installer of my heat pump gave me that exact advice. Forget my Eddi and use the heat pump. My wife? "I don't care. I like the hotter showers". Happy wife, happy life
@zzxap19 that's a fair point. With the eddi, is it possible to set the diverter to only kick when the HW cylinder is at a certain temperature. That would be ideal. Allow the heat pump to efficiently get it to 45C, and allow the diverter to take over from there to 50C and beyond.
Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
@andris you mentioned a cover for your HW cylinder. Did you buy one?
Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
@editor No, I made one 😀
Loft insulation all around, then put an old curtain around it to seal the fibre glass. It is located under my stair case inside the house. Not the best as it is a horizontal tank. But I have definitely halfed the heat loss even though it is inside the house.
16kw Samsung TDM ASHP. 8.4kw PV, power optimizers 20×420watt panels 6kw SolarEdge inverter.
Ideally you could put that power through the heat pump, but I haven't yet found the controls with sophisticated enough logic to do that. Any one else seen any good ones?
It is a decision on what you prefer/ your situation, do you get a good export rate for your electricity? If so, export to the grid. If not, use as much as possible at home and put it in your hot water tank!
- 22 Forums
- 2,073 Topics
- 45.5 K Posts
- 96 Online
- 3,351 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: Commencing on an ASHP Installation Process
@sheriff-fatman Thank you for a very detailed review of...
By ASHP-BOBBA , 8 hours ago
-
RE: Ripped Off: How UK Homeowners Are Paying Gas Prices for Wind Energy
I believe there's another reason that network upgrades ...
By Transparent , 9 hours ago
-
RE: Why Your MCS-Certified Installer Might Not Be As Competent As You Think
I'm more than happy to try to help. Are you op...
By JamesPa , 13 hours ago
-
RE: What’s the modern take on advised types of insulation?
@jeff I am sorry @jeff if I have misunderstood what you...
By Toodles , 13 hours ago
-
RE: 5 Star Service from Havenwise
@sheriff-fatman Good post. I am also considering Hav...
By Morgan , 18 hours ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@editor Cobbler’s Mantra that!
By Toodles , 19 hours ago
-
RE: Radiators downstairs are cooler at the bottom after ASHP install
@melonbuffet This is great assuming now the down stairs...
By ASHP-BOBBA , 2 days ago
-
RE: Renewables & Heat Pumps in the News
Australia Blue, the first wind farm in Western Victoria...
By Morgan , 2 days ago
-
RE: Flow rate discrepancy between ASHP and manifold
That's useful thanks, I hadn't seen that table before. ...
By AshRolls , 2 days ago
-
In principle I agree, @johnmo, but with provisos. The...
By Majordennisbloodnok , 2 days ago
-
RE: Heat pump installation and BUS Grant timings
@jamespa Thats how I understood it too. 🙂
By ASHP-BOBBA , 3 days ago
-
RE: Antifreeze top up for my heat pump - is this a rip off?
@sallyl That sounds about right if they are re-filling ...
By Brendon Uys , 3 days ago
-
RE: Enabling WiFi: Samsung ASHP on Smart Things App
I would switch it off and see if anyone noticed. We use...
By Anonymous 5011 , 3 days ago
-
I wouldn't be so sure about that. Heat pump designers ...
By JamesPa , 3 days ago
-
RE: Jokes and fun posts about heat pumps and renewables
@toodles they're a rowdy bunch!
By Mars , 4 days ago
-
RE: Home energy storage & battery register
@jamespa To a certain extent, by exporting to the grid ...
By Toodles , 4 days ago
-
RE: Forum updates, announcements & issues
@editor Fairy Nuff Mars, I doubt that my ramblings woul...
By Toodles , 6 days ago
-
RE: Confusion about heat pump sizing
We’ve published a deep dive into heat pump sizing, and ...
By Mars , 6 days ago
-
We’ve published a deep dive into heat pump sizing, and ...
By Mars , 6 days ago