Battery system to make my heat pump cheaper to run
@windymiller The Tesla Powerwall is in the extension along with the wiring to the grid connections at my meter and control gear for the 8.1 kWp. solar PV. The Tesla Gateway does all of the switching required via the IOS app. 27kW/h of energy will run the house and heating for approx. 10 hours or more depending on how hard the heat pump needs to work. Usually, there are sufficient hours during the night when greenest and cheapest rate allow me to fill the battery again. I have not knowingly ever had to take power from the grid during the ‘peak time’ of 16:00 to about 19:30 or so. Normally, I’ll tell the MyEnergi Eddi to charge the Sunamp Thermino during the night as that cheap rate then allows me to export more of my solar PV at 15p. Per kW/h during the day - though I can of course let the sun take the DHW strain if required too. Regards, Toodles.
Toodles, heats his home with cold draughts and cooks food with magnets.
From observations I've made at substations, the main issue with ASHPs is the switch-on surge.
A typical domestic (single-phase) heat pump can take 30-35A when starting, which drops down to less than 10A once the compressor has got the fluids up to working pressure.
Plus there's a spike as the compressor motor starts which lasts around 1/10th second whilst the magnetic flux builds up.
So any inverter with a HP as a load must be able to deliver that output surge current whilst keeping the voltage within the required envelope.
What's the maximum continuous current and the surge current capability of the inverter within your Hyundai?
If you're 'running an extension lead', what's its current rating or conductor specification?
Save energy... recycle electrons!
- 26 Forums
- 2,208 Topics
- 48.7 K Posts
- 313 Online
- 5,868 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: Heat loss calculations and how they work in conjunction with heat pump sizing
Thanks and apologies if I was a bit lazy...I have not p...
By Batpred , 4 hours ago
-
RE: Havenwise App Help & Forum Support – Get the Most from Your Heat Pump
@plasfron Hi there! Yes your Mitsubishi heat pump needs...
By HCas , 6 hours ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
The recent ZeroDisrupt discussions reminded me to take ...
By Mars , 7 hours ago
-
RE: What is the Heat Geek Guarantee?
@colinc, that’s a very fair and well-balanced comment, ...
By Mars , 7 hours ago
-
@toodles Thanks. I will assume they have made som...
By Papahuhu , 7 hours ago
-
RE: Are We Sleepwalking Into Another Race to the Bottom?
Oh come on, that's a ridiculous argument by an installe...
By JamesPa , 8 hours ago
-
RE: Say hello and introduce yourself
I've seen photos of other people placing the tank in a ...
By Transparent , 9 hours ago
-
RE: PV Panels on roof in Conservation Area
@colinc Do your own due diligence re reviews etc but...
By Morgan , 9 hours ago
-
RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face
So true, possibly with the exception of people you woul...
By JamesPa , 10 hours ago
-
RE: Isolating the system for a planned power cut
I hadn't realised your reason for a 100mA trip was due ...
By Transparent , 10 hours ago
-
RE: Midea ASHP – how to set weather compensation
Some things worth mentioning: (1) the Headroom Heat P...
By cathodeRay , 11 hours ago
-
RE: Heating Turned Off but Radiators Still Warm
@9jwr9 I didn't get an answer at the time and there has...
By Pipcart , 11 hours ago
-
RE: Battery storage to run Heat Pump.
@majordennisbloodnok I’m not sure you will be able to r...
By Toodles , 11 hours ago
-
RE: Renewables & Heat Pumps in the News
You've completely missed the point. Old, unpatched so...
By Majordennisbloodnok , 12 hours ago
-
RE: Ecodan Energy Monitoring Pack
@batpred that’s an idea yes. Will look into it
By Carpenterstation , 12 hours ago
-
-
PUHZ SW120Y & EHSC-VM2D - Buffer tank to Volumiser
Eventually I was able to find someone here in the Algar...
By DavidAlgarve , 12 hours ago
-
RE: Anyone still weathering it out with Agile?
We are still on agile and it works ok'ish to charge the...
By Batpred , 13 hours ago
-
RE: New Fogstar 15.5kWh upright solution
Ah... now I can see a photo,and that changes the advice...
By Transparent , 15 hours ago