Відео

There's definitely a gap in the market, to make the 3 work nicely together...looking at the next day's weather & variable tariffs...without having to go deep into the likes of home assistant integrations....or even if you do want to use home assistant....what heat pump works....how many heat pump installers will even know what you are talking about if you ask them if their preferred brand works well

When you're looking at energy you have to look at the way the energy companies charge you and that's by the minute so if you want to save money you need to think like them and make the best out of every minute of the day using every means to add money to your account, as those penny's add up at the end of the week.

I have solar, battery, storage, heat pump, and 2 EV's the massive change coming that people need to consider is V2H and V2G all of a sudden when you have a 60kWh battery parked on your driveway that you can charge overnight at 7p/kWh and discharge in the day the argument for large house batteries or solar arrays weakens but the argument for heat pumps becomes compelling.

I was 2 days from Octopus fitting my heat pump I’ve got solar and batteries Found out from Northern Powergrid I have a shared loop system with our neighbours They already have solar and batteries and a heat pump and 2 EVS So impossible for us to have a HP or EVs unless we have our own supply fitted meaning our 2year old lovely drive needs to come up What a kick in the bo**cks

4:17 Hi there, I found your discussion on the benefits of using a battery with a heat pump quite interesting, but I’m struggling to make sense of some of the claims made, and I’d appreciate clarification. Specifically, I’d like to understand the calculations behind the savings mentioned. Here are a few points where the sums seem off: 1. £30/day usage: To spend £30/day at current electricity prices (e.g., £0.25/kWh), that would mean consuming about 120 kWh per day. Even with a heat pump in a large house, this seems highly unlikely unless it’s an unusually massive property with extremely high heating demands. Most heat pumps are far more efficient than this. 2. Battery cycling and tariffs: You mentioned using a battery system costing £15,000, likely 2 Tesla Powerwall 3 units (27 kWh total usable storage). Charging and discharging the battery three times a day assumes a tariff structure allowing for three low-cost periods long enough to charge it fully (about 5.5 hours per cycle at 5 kW max). However, no current UK tariff provides three off-peak periods averaging £0.12/kWh for such durations. Even if one existed, the cost savings wouldn't match the example provided. 3. Savings calculations: Assuming a best-case off-peak rate of £0.07/kWh and a peak rate of £0.25/kWh, the potential saving per kWh is £0.18. For 27 kWh, that’s a daily saving of £4.86 per cycle. Factoring in 10% losses from AC-DC conversion, the actual saving would drop further. Over three cycles (which seems impractical given tariffs), the maximum daily saving would be around £13.50-far from the suggested £23/day saving. 4. Seasonality: High daily electricity costs like £30 are only realistic during the coldest months of the year. For most of the year, a heat pump wouldn’t draw anywhere near that amount of energy, significantly reducing any potential savings from the battery. Could you kindly clarify how the savings figure of £23/day was calculated and how you account for the limitations of tariffs, heat pump efficiency, and battery losses? I’d love to better understand the logic here, as the maths doesn’t seem to add up. Thank you!

We live in a rural area where we could not get a smart meter working, so we ended up getting an old school Economy 7 meter to charge our cars and home battery and we are getting a heat pump next month.

The "holy trinity" should be extended to all via government assistance as it pays for itself and makes the nation less dependent on gas import. There is not much point in solar divert if your overnight import is 7p and export 15p. In fact, as your heat pump is 300% efficient for hot water it makes even less sense to use a 100% efficient immersion heater. At least you should be only heating water by heat pump and that can come from battery to cover clouds passing over but with cheap rate do it at night only unless you use loads.

Thank you for the great video. It confirms that I am on the right track to energy independence. All started with electric cars, then solar and battery installed last October and in the process of installing heat pump with Heatio.

Great channel. I just got my nibe S1256 geo heat pump talking to my Fronius gen 24 solar inverter. Also integrating home assistant now. Next up is my BYD batteries. A work In progress. Haven’t started time of use tariffs yet

Sorry Graham, Elon has been an overhyped d1ck for a long time. The wool is just falling from some peoples eyes recently.

Got Solar (14 panels), Batteries (19kWh) & an EV charger but a HP is unlikely due to location issues & my aversion to having a large metal box in view in our quite small back garden & the upheaval that goes with it. So I'm staying with mains gas for now. I do regret not getting a G99 for a larger inverter than the 3.6kW Hybrid inverter we have which is all to easy to overload with too many appliances running at the same time, & that's without a heat pump! Also, I haven't used my Edi solar diverter since I switched to Octopus Intelligent Go because it's financially better to export any excess solar back to the grid. All the solar I exported during the summer is funding my gas bills throughout the winter. Another good panel discussion video. 👍

I disagree with the battery segment to some degree. I sorry but I don't recommend Solar Edge - their system relies on optimisers on every panel which becomes very expensive when they fail (and they DO - Artisan had 12 fail recently on a single commercial roof). Also their current battery is the old style Lithium-NMC which is more prone to fire runaways (same as Tesla PW 1 & PW2). There are new products coming from them but as far as I am aware they still use panel optimisers. You should ONLY install optimisers when there is a LEGITIMATE requirement - eg Shading issues or due to composition of PV Strings. . I do highly recommend looking at systems that utilise Gateways aka Whole Home Back Up devices. Currently this is quite limited Tesla PW3 SigEnergy GivEnergy Solar Edge Hanchuu Ess FoxEss due this year Solax (?) - they have one but doesn't appear to be available in the UK . As to what the correct sizing of your battery should be you should carry out a proper evaluation of your current energy use. 1) Use your Electricity bill for the annual consumption - you can divide by 365 for an average daily consumption 2) Using your In Home Display turn on everything that could be used during the coldest day in winter. This will give you a maximum PEAK demand. 3) Now you have to consider what potential changes you may have to make in the future - ie electrification of your heating (Heat Pump *kw + Booster/Backup/Immersion Element 1.5-3kw) and cooking (electric hob - 1.5-9kw) but we can mostly disregard EV's as there is no system that could cope with that additional load. This would give you an additional load to, if at all possible/affordable, to factor into your inverter and battery sizing. 4) If you are choosing a Hybrid inverter - one to which you can directly connect batteries then the limitation on what you can use from your batteries will be (i) the maximum power your inverter will allow you to pull when running on battery only - if you choose a 5kw hybrid inverter your limit will be 5kw, if 10kw then the limit will be 10kw. (ii) a limitation imposed by your batteries themselves - this is covered by the "C" (charge) rating - you will see batteries described as 0.5C this means that they can charge/discharge at HALF their rating - eg 8kw battery @ 0.5C will be limited to 4kw. So if you had a 10kw hybrid inverter plus an 8kw (0.5C) battery then your limited would be 4kw due to the battery. . If you are unable for any reason to obtain an inverter that meets your current or future needs then ideally look at a system that allows for parallel systems to be installed If you are able to size the inverter but unable to cover your energy needs with the battery then ideally look at an option that offers modular batteries so that it is easier to increase battery storage at a later date. . Choosing the right brand of battery is difficult for the consumer and often they are given poor advice by installers. A number of factors will impact your decision: Software - as already mentioned Tesla is terrible - they can't even be bothered to change the currency from $ to £. However this restriction is now being overcome by the use of NetZero (3rd party application available on Android/Apple). I didn't know that Heatio could integrate with Tesla so that's interesting. Most new entrants to the market simply copy Tesla so finding better options can be difficult. GivEnergy have one of the best software setups on the market - they allow 3rd party integrations and there are plenty that will now use weather/solar prediction to enhance your solar/battery setup Solax has a good reputation for 3rd party integration - this brand is often used by people adding EV Batteries to their homes for battery storage FoxEss also has some integrations that add full functionality to the software. SigEnergy uses "AI" to factor in weather/solar optimisation and arbitrage (load shedding) etc - but its a new company and isn't without some bugs PowerOcean Ecoflow has some very good software - its an evolution of the Tesla model but adds features that should be standard. . GivEnergy have 12 year, unlimited cycles on some of their products Tesla offer similar SigEnergy have a total energy throughput PLUS a maximum number of years (they offer 10 years but instead of number of cycles they use a number in megaWatthours an 8kw [7.8kw useable] battery has 23.77mWh = 23,770,000 / 7,800 = roughly 2971 cycles Others vary whether they use a combination of Years/Cycles or Throughput (mWh)

Elon is not a dick?

This is music to my ears. Working in solar first in 2011, installing our own in 2013, getting our first battery in 2015 (the then DECC “Distributed Grids” trial), and installing a Heat Pump in 2023…we pretty much saved 1/3 of our Heat Pump install cost in the first year. That’s thanks to now 16.5kWh worth of battery storage, hedging all our electricity usage to the low points of the Cosy Octopus tariff, and solar powering us through the summer months + the added bonus of an old FiT (which I’d keep the reality of to myself 😉). One thing I will share though; in the warmer sunnier months, the heat pump isn’t working that hard on temp difference for just DHW or the myenergi Eddi’’s doing it’s business, and the solar generation covers our base load, the whole of August 2024 cost us just over £6. One recent cold day in January 2025….£6 😅 As you’d imagine, your Octopus account is way in credit, but quickly gets used up in the colder months. That is after all what Direct Debit payments are for (although, I keep an eye on the balance, as heard Octopus doesn’t ring fence the actual customer cash, putting it to work on their various investments).

What about EV's? Best tariff for export and import is Intelligent Go.

I think the comments in relation to Growatt were a bit unfair. I recently had a 4.5kwp Solar PV system installed with a Growatt 3.68kw inverter and a 6.5kw battery. I'm looking at getting a heat pump this year and the Growatt app allows 3 programmable daily charging periods that should tie in nicely with with the Octopus cosy tariff. I'll likely look at topping up the battery in the daily 3 cheap rate periods during the winter. The only downside is that all readings and control is via the Growatt server, wherever that might be, but I don't have any problems talking to the server. I'm expecting a 6.5kw battery will probably do me on the cosy tariff and although potentially reducing the life of the battery, by cycling the battery multiple times a day during winter, the technology is moving on and batteries are reducing in cost year on year; The Growatt battery apparently has a lifetime of over 6000 cycles and a 10 year manufacturers warranty. Time will tell if it works out as I anticipate, but the Growatt battery and inverter as part of a solar install was supplied at a highly competitive price.

They should introduce the Net zero scheme like in the states where when you have a surplus the meter goes backwards so when you use the grid you do not pay until you catch up to where you were before, no need for smart meters then.

Holy Trinity 😂. True though. I guess the other one is insulation, air tightness and ventilation. I don’t understand the economics of a solar diverter if you have the trinity. In winter I think it is unlikely you’ll have any excess for the diverter. The rest of the year solar can power the heat pump at several times the efficiency. In this case all I need is a forced boost function.

Wow , you should play this back and listen to yourselves, it really sounds nonsensical.

I've had 3 Octopus surveys and due HP installation in February. My 1950s house wasn't built with central heating and since the Glowworm was 26 when I moved in, in 2007, my WB is 18, so the system is likely 44yrs. All the bore is 15ml except on kitchen vertical that must have been added when previous owner partitioned off kitchen/diner and that is nearest the boiler and only 8mm. A plumber quoted £450 just to change the 8mm so I had the 3rd "senior" survey who agreed that since the 8mm heats no problem on my 50ish flow rate, it's a bedroom one on 15mm that needs the flow rate nudging up to 54. He said he was happy with the performance of the kitchen rad but would add a buffer tank in case the bedroom rad continues to struggle.

What are your thoughts on the Octopus offering? Cosy heat pumps? They weren't mentioned as good or bad here.

Hi, slightly concerned about last two episodes seemingly championing hybrid systems. Based on this and other channels saying how good ASHP's are heating a home properly with good system design we have now ordered one. Getting slightly concerned have I done the wrong thing. Financially the only way the HP makes sense is with the BUS grant so you can't have a hybrid system if you have gas. Our boiler does need changing (believe it or not its incorrectly sized for our home as too small to heat it!) we had to do something. The HP was slightly more expensive option than new boiler but without grant it would not have made sense with current pricing differential for gas and peak electricity. Overall I enjoy your videos, have subscribed and have even bought the book so I have gone all in! Just wondering now is it going to be a disaster. I really hope not as I won't be very popular with the wife and kids.....

Great discussion. To your 16:29 query about AIRA’s first jobs, we were job no. 1 in the UK (or no. 2 depending on how you count, as they did two concurrently w/c Oct 30th 2023). Having an 5kW aroTHERM plus installed, I talked their Designer out of putting a Buffer Tank in our place, settling on a Volumiser (pretty sure it’s a Inta 18 Litre). Have photos of the install and can share if you ping me.

Simplest way for short term requirements in one room (granny visit) is probably boost with thermostat electric fan heater or electric oil filled rad. Avoid playing with main setup/controls for short term changes

We use Agile tariff so schedule hot water: 47 deg overnight 1pm to 5pm 40 deg during day (provides sufficient topup and still need to add a little cold to showers/baths) Off during peak 4pm to 7pm If housefull of people we may boost overnight and/or temps

Rather confusing episode really. A lot of conversation about controls to attain and maintain correct temperatures? Most other contributors have championed achieving this by design, correctly sized radiators for the room they are installed in to achieve the design temp. I would have thought that to keep altering the effective active system volume by switching rooms on and off would make the ASHP prone to increased cycling. I thought that most advocated pure weather compensation for ASHP, with less internal intervention? May need to go and watch past episodes again.....I'm sure Graham will be spitting feathers 😂.

Why do wet heat pumps cost so much, air conditioning units are relatively cheap which are heat pumps.

Sadly the environmental argument doesn’t hold water just now. According to National Grid data, uk electricity production for January has been generated 60% from gas! The gas power stations are apparently only 50% efficient! Transmission loss from generator to my meter point is reported to lose a further 8%. This makes my £600 Alpha condensing boiler look very good when you take all this data in to account! It requires very little servicing and if run at low flow temperature is incredibly economical even in my 120 year old property!

I like the idea of a heat pump to replace my boiler as I love gadgets! I also use woodburners as I have a free supply of logs! My overriding concern is the running cost! Day rate electricity is 4 times the price of gas in the UK. You need a SCOP of 4 just to break even!

If engineers want to make sure the owners don't accidently change some settings, we need to have an option to store preconfigured settings by the engineer. Like preset settings engineer sets post successful commissioning of the system. That way, if there is a problem reset can be done over a phone.

Our first experience with an ASHP was crap to say the least ! We had a HeatKing 13kw unit put in via a grant, it was abysmal. We had no control over it other than a normal wall thermostat. Anyhow our neighbours unbeknown to us logged a noise complaint to the council about the noise it made, first thing we knew was a visit from env health. The main noise was from the defrost cycle which was quite loud. In the end we ripped the bloody thing out.

Heat pumps don't work, its a scam

RHH, why do you call your channel 'Renewable Heating Hub'?

Contacted one of the largest manufacturers of AHP, asking them for details of a local installer. After an initial phone call i received a detailed quote for supply and installation along with order forms, all without even visiting my property. Needless to say I certainly won’t be using them or the manufacturer either!

Solid topic, Mars. I often remind people that when you communicate with your customer (the viewer), it MUST benefit them: solve their problem, entertain them, etc. Cracking example of that in your title.

The thing with a hybrid is you cannot get rid of you gas supply, so you would need to to weigh up the difference between cold days and paying a standing charge.

So you get a similar running costs maybe a little cheaper with a heat pump once you size radiators correctly for heat loss which is a very small capital cost compared to a heat pump install where the capital cost is so high its a 26year return on investment break even.

I’m running a Worcester 4000 combi paired with a Worcester EasyControl and its weather dependency control is excellent. When it was -7 outside the flow temp was 45 degrees, today it’s 0 and it’s 40 but most days it’s around. 29-35 degrees. The boiler has a 10/1 modulation ratio and is ‘on’ 24/7 mainly ticking over at between 3-5 KW. The house is super comfortable at 20.5 degrees, the install was much cheaper than a heat pump and I’m using minimal gas to be nice and warm. I have the overnight set back at 19.5 degrees. It’s only costing me around £2.50-£4 a day in the winter depending on the outside temp.

I’ve always found it odd how inefficient your heat pump is Mars at low temperatures. Ours ticks along at about 1kW and 44 degree flow temp when it’s 0 out. Are you sure there isn’t a backup heater running?

The Vaillant install with UFH and rads should have been a schematic from a big Vaillant book…

Well, that was slightly depressing! I don't have a heat pump but do think about them but the uncertainty of design and having a good system installed well makes me think I don't want to be a relatively early adopter. I honestly thought the industry would be installing well designed systems by now. I thought they'd have worked it all out and that they'd not be making it up as they go. Back burner for me unfortunately.

Hey, Lets have a chat. 2025 The YEAR NOT to get a Heat pump...

at 19 mins in to this video it's nice to hear a honest opinion when the temperature drops, heat pumps do work it's just the price of electricity compared to gas that's the problem.

Interesting views and comments - pros and cons of both types of system. I have a 3 bed 20 year old detached house with full insulation - windows, walls rood etc. Last week the daytime temperature in Derby where I live was 14 degrees during the day so no heating needed till the evening. Running a combi it was simply a matter of one button pressed to set the water temp at 60 degrees and the house was warm in an hour. A heat pump does not have the ability to respond to daily or hourly changes in temp quickly which is why I would never install one. My daily heating with gas is about £3.00 in the winter - about 50 pence in the summer so no financial incentive to change. I run the combi at 50 - 55 degrees water for full day heating - hence the low cost.

Good advice. Stick a weather compensator on your gas boiler (most people don't know they can do this) and a heat pump will not beat a gas boiler whilst energy rates stay the say and you factor in the extra cost of a heat pump install. I did some research and found out that my 15 year sold boiler had a kit available for less than £50. Fitted it myself and saved a fortune on my gas bill.

Some good practicle advice and comments as normal. While we wait for our ASHP to be installed, we have been running our boiler on a lower flow temp and keeping heat on as required over 24/7. 18 degrees over from 21:00 until 06:00 and then bump up to 19 degrees. Interesting data on running costs compared to last year. Last year heat was set to run for 5 hours each evening only. The cost difference between 24/7 controlled heating to 5 hours per night was just 1/3 more! .....and 24/7 comfort! Thanks to all the team for their advice.

Lol. So loud you couldnt figure out if thats what you were hearing and the mic didnt pick it up.