Cheers Jim, sorry to hear about the C diagnosis.

Randomers on a bike forum win 😂 it’s a great point goldfish, think I might access the EAP through work in parallel.

So caffeine, flat white in the morning and probably three cups of tea in the afternoon.  That removal of coffee has sent me in to cold shudders 😂

Hi joefm, yes got tested and they did the inflammation markers, probably 5 years ago. I think it’s time for a repeat, I’ve submitted the doc request just now. As you say, better off knowing. I tend to think if the thought of knowing and sorting it, however awkward is less off putting than living with it then it’s time to get it sorted!

Thanks stick_man. Will download and start it.

Thanks st66. Hadn’t thought of that. Could match.

cheers fossy, I think that’s probably at the omg scale of things. Hope BIL and SIL are ok

I think from memory you’re missing a plastic cable guide, similar to the one you have for the other cable. Cannondale have all the exploded diagrams and drawings on the interwebs, find the owners manual and it’s in there

@ampthill FairPlay, makes sense then!

I’m going to stick my neck out and say the environmental component of this is virtue signalling?  What consumes the least carbon, shipping bike launches round the place, or having disparate  sets of people converge on one location? I’d have thought it’s the latter.

😂 if they were a grand I’d be right with you tbh!

A £k? An iboost is £300!

So we have a 8kwh mixed east/south/west array capped at 6kwh, with Tesla powerwall and solar iboost. Basically the iboost will only kick in once the battery is full and all house demand is sorted. We have a 300L hot water tank and on sunny days it does completely heat it. I’ve seen it take between 8 and 15/16kwh’s to do this.

We are on oil, so I’d prefer to use less oil, it may be slightly fiscally better to use oil to heat the hot water and sell electric at 15p but that’s not the direction I’ve gone in. Thumbs up for the iboost from us. It’s easy enough to turn it off also and they’re not expensive.

Recently got a Stihl cordless mower on the AP battery system, self drive. So far it’s been excellent. Quieter, lighter. Lovely to use. No brainer.

Interesting re the guidance change.  Our inverter is in the loft on an end wall, the Tesla power wall and gateway are both outside – one of the main advantages of the Tesla unit I think is its temperature management.

Re insurance companies, I rang mine (M&S) and told them and they weren’t remotely bothered.  Asked them to log the notification however

WCA if in north of England know a very good podiatrist. PM if want details. They work mainly out of Northallerton

No. With a 5kw inverter the max you could use from the panels is 5. So 3 to the house then 2 to the grid. For example

We took the attitude of more panels for the reasons above. On a normal grey day, we will still produce 5-8kwh.

We are already clipping in the middle of the day in full sun, which is the downside!  Our set up is 5.2kw facing straight south and then 1.6kw facing east and 1.6kw facing west.  Whilst we bump up against the 6kw inverter in the middle of the day, we start quite early and finish quite late.  February was our first month of having it, we produced 305kwh in North Yorkshire

But inverters are cheap relatively, in 5-10 years maybe stick a 8 on if they’ve upgraded the network or changed the rules. Then we will have sufficient panels.

Northern Powergrid didn’t charge us for g99, but they did insist our inverter capped us at our export. So we are capped to 6kw

feel you on the cost and difficulty benchmarking.  We used a company called green building renewables.

North Yorkshire. 8.7kwh inset panels, 6kwh solar edge inverter, solar iboost and Tesla power wall. £17k including scaffold.

Re leaf, yes. Production of current one not far off ending (it may have already I’ll check). I’ve heard the new leaf is very tasty.

Agile and electric car here. No special usage we just charge the car overnight or when we see pricing go very low (plunge).

average price paid over last 12 months with approx 7200kwh’s is 4.9p / kWh. Last 6 months is 4.5p / kwh

thanks everyone!

Thanks so much everyone.  Sounds like cheap ticket it is!!!

Nicholson Morgan in ponteland were excellent

Well I like a fast estate!!! Ran a mk7 Golf R for two years, loved it. Easily got 40mpg on long journeys.

Currently got a 2 litre diesel Quattro A6 estate. 200bhp. Not especially zoomy but plenty fast enough in a usable way. Very pleasant place to be for not silly money.

So we got ours installed at the end of January:

• String one – 10 * 435w inset panels south facing
• String two – 4* 435w east & 4* 435w west
• 6kwh solaredge inverter and Tesla Powerwall

What’s amazed me so far, one week in, is how much we make on a totally overcast or wet day, we generate 4-6Kwh even when the sun doesn’t break the clouds (North Yorkshire).  when the sun comes out we’ve seen 4kwh generation.  Best day so far 16kwh, worst day 1.5kwh.  Powerwall has been excellent, we’ve been self powered for 50% of the time, longest stretch was 36 hours.

Swift Basecamp wasn’t too bad when we looked.

I’ve been looking at this https://chimneysheep.co.uk/collections/wool-insulation

So I’ve spotted some errors in the sheet, so I’m going to get those fixed.  I then realised my logic was a bit flawed, so I’m going to get them to model every P+ rad being upgraded to K2, then with the lower flow temp and delta t.

One question, probably fairly silly, how is delta t adjusted?  What determines it being 5 degrees, not 10 degrees?

Thanks @alanl that’s very useful. We are rural North Yorkshire so somewhere in the middle probably. We are also a 19 degree house tops. 19.5 on very special occasions :) you’re right about the bodies. It’s quite noticeable how warm it gets when we have people round  We do however do quite well with the sun. The length of the front of the house is south facing and it’s amazing how it heats the house. We have got solar panels going on next week!

@alanl that is super useful, thank you!! I’ll get them to model the 35 flow temp and delta of 5, and see what that shows in terms of rad volumes.

what external temperature would you use for the calculation?

grateful again for the brains on singletrackworld!

Yeah @molgrips!!  :)

Thanks Mranger156 – as I say I think they’ve overcooked the calculation on heat loss to be pessimistic – I’d asked us to calculate it erring very much on the safe side.  re the Propane 290 yes, been looking at that.  As mentioned part of the reason we were considering it was the ability to free up the boiler space in the kitchen and future proof etc.

HI Matt, well firstly we’d look to sell the boiler so it wouldn’t be wasteful. Secondly heating oil prices are rising quite heavily over the last few years, to the point where the cost would be neutral right now when we’re paying circa 65p.  It’s not uncommon to have to pay up to double that, and that’s not going to get better over the coming years. In terms of environmental cost oil heating is far from brilliant!  

There’s also some secondary impacts, so we would be able to change the layout of the kitchen to significant benefit, which we’re thinking of re-doing this year, the boiler location is fairly intrinsic.

You’re right however, the kitchen component has got us thinking about it sooner than we might have, which is is making it a tricky decision!

So the heat loss numbers were calculated by the company, they took worst case insulation values and higher design temperatures.  Do you think they’ve overdone it?  They’re estimating our energy use annually on a heat pump as being around 5163 kwh

Yeah –  a bit of me thinks we could just put it in and see, and see how the flow temp works in the room.  If we had to have a flow temp curve that went up to 50/55 degrees when its sub-zero outside, I don’t think that would be the worst thing, given the frequency.  My thinking is we could then upgrade rads as necessary, once we see how it feels.  But this also seems a little contrary to advice.

Hi team!

So we are investigating ASHP and have had a survey, to replace our oil boiler (fairly new, 2 years old Worcester Bosch which is adding to the conundrum).  House is mid-00’s build stone detached 4 bed, with a cavity then insulated breeze blocks.  Decent loft insulation and double glazed wooden windows.  No underfloor heating.

As part of the survey we’re looking at a 12kwh Samsung HT Quiet, with the aim of running it at a flow temp of 45 ish.  Listed specs show COP of 4.2 @ 45 degrees.

We’ve calculated then the output of the rads, and modelled it against a 55 degree flow temp, the first chart, and then a 45 degree flow temp, the second chart.  Both with -2.2 degrees external temperature and assuming worst case insulation.

55 degree:

View post on imgur.com

45 Degree:

View post on imgur.com

Our rad types are in there, and they’re wondering if we could switch to K3’s in some rooms. What are the general thoughts?  It goes from being ok in the 55 degree to definitely not in the 45 in some key rooms.  We have a wood burner which we can use to boost things when it’s very cold (rural area, we lose power supply quite frequently).  Is it sufficiently borderline that it would be worth going ahead with the ASHP and seeing what the performance is like?  Or stick in a modern K2 radiator?  Part of the reason I’m asking is the K3’s are so deep (18cm) it would be a bit of a nightmare.  Having looked at BTU outputs I think we could achieve similar outputs with modern K2/Type 22 rads.  Or am I being overly optimistic?  I think it’s fair to say we’re willing on this topic but generally a bit nervous.  Minus any radiators, we’re looking at about £4k after the grant, including a new 300L hot water tank and some 28mm pipe run.  I’d really welcome any advice or insight!!

House worry, huge one. Recent water leak from shower hasn’t helped 😂

Scruff and Bear I think I’d be keen on your consultancy as to whether we do our house!!! 🤓

re the OP. Super tricky one this, solar I think probably a strong bet. ASHP I’m having enough trouble working out whether our mid-00’s well insulated stone build (cavity with insulated breeze blocks and 15-28mm pipe) will work so we can get off oil heating.

Same problem with alpkit jacket here. Totally wets out, year old.