Heat Pumps - post here.

Question for anyone with heatpump, solar , battery storage and EV, did you have to upgrade the standard 12kva esb network' connection?

If you are trying to fit all of it into a three hour window then it helps….I have all of the above but I only got a battery two weeks ago now and TBH I am struggling a bit to fit them all into the 3 hour period even with my 16kVA connection…Im pulling 17.5kW for the three hour slot My Zappi is the one stuggling that is loosing out a bit as that is the one that is modulating to keep me under my 80Amp breaker. The Zappi or the car is giving up at times as there isnt enough headroom it needs a min of 1.4kW, which is ok for now as Im not doing big mileage to need it on for the three hours.

One caveat is that I do have a big ass inverter that is capable of charging at 200Amps into my battey so thats 10.5kW alone, when you add in the HP Im already up at 14-15kW and then there isnt much left for the EV. If I had an inverter that would charge at 100Amps I would probaly fit them all in no problem. 5kW +(Batt)+ 5kW (HP) + 7kw (EV) =17kW.

This is only a winter issue as well as from March to November I wont have the space heating on at night so I should have plenty of room then.

In answer to your question my thoughts are yeah I think it would help a lot and gives you options. If you dont upgrade then you will have to look at maybe the four hour smart plans to spread the load.

With dynamic pricing coming next year having that headroom to pull the the extra bit might pay off as well. My house was a new build so I went with the enhanced from the get go as I knew I was going down the EV HP all electric house 5 years ago when building. From What I hear to upgrade can cost a couple of grand though.

Yeah the car is losing out on my side as well. Putting 5.4kwh into storage batteries, usually the dishwasher is on so I'm getting maybe 16kwh into the car over the three hours. I know I could push the grid limit on the zappi but I'm not comfortable doing that. Probably would need 20kva to be comfortable..I filled out the forms on the esb network's site so waiting for them to get back to me. No rush with it really. How much would a 6kw heatpump pull at night? 2 or 3kwh max?

currently trying Havenwise app to control my heat pump. 3 mth trial. Not sure if it’s making much difference or not. May subscribe for a year after trial. Mitsubishi ecodan

is there anyone doing independent heat loss calculations around north county dublin? Id like to get a heat loss calc done independently of my plumber. He is good but wouldn't be that hot on heat loss calcs. He installs heat pumps so if i knew the right size to fit i'd be comfortable having him do it if i ever pull the trigger on it. I ran everything through heat punk and it came in at 5.7kw heat loss. I'm not sure how accurate i have been with things like rad etc. I'm thinking 5kw might be risking.. 6kw might be the size to go for but i don't want to finger in the air it.. he uses Panasonic heat pumps which I hadnt heard much about but the newer ones seem to have a good reputation..

Anyone know if you can just use the monobloc part of this Panasonic heatpump with an existing heatpump cylinder?

https://www.aircon.panasonic.eu/IE_en/happening/aquarea-l-generation/

It looks like you need the indoor unit as well?

thanks ive k2? double fin rads upstairs.. how do you measure their output? have large column steel ones downstairs.. two triple, one double and and one remaining older panel thats double but very big in the office/garage.. the bathroom has a single panel steel but its not a big bathroom

I took values from Stelrad and then converted the output based on the flow temp I was hoping to achieve, here is the conversion table

have a question on where folks put their heatpump thermostat in the house? we will have one zone. At the moment our 'nest' is on the landing. Downstairs we have open living space but i don't think we can put it there as we run a stove which would overheat the space and the heatpump im guessing would switch off and leave everywhere else cold. We have one room downstairs which tends to be the 'coldest' room. Should it go there? The landing ive been told is never a great choice. I guess if we put it there we can figure out the temp for there that will maintain the other rooms temp? sorry if this is a dumb question!

im sure it is possible.. with motorised valves etc.. we never split it for the gas heating..

Not sure if we will always use the stove.. probs will for a few more winters but maybe not longer term.

All rads

yes i think so.. im lost in the looking.. i'm thinking of the grant 9kw r290 unit.. it cycles down to something like 300 watts.. which is as low as it can go.. i asked the urban plumber on youtube and his choices were grant, viessman or valiant.. im wondering about placement restrictions with r290.. its a little confusing. the best position for mine is under a window beside the back door.. window is never opened.. there is a manhole cover to the side of the placement position. Its the closest run for my hotpress/cylinder. up back of house, into attic and down..