Mally Posted February 11, 2020 Share Posted February 11, 2020 Hi, I was applying for a quote for a new electricity connection to a plot I am in the process of buying on a windy part of Skye. My plan is to build: A 4 bedroom house: single or 1.5 storey Using a timber frame kit Insulated to a high specification With at least average quality glazing With two en-suites Measuring 170m2 approx I got to the page asking for information about the ASHP. I thought it would be easy to choose a model, add the model number, and usage stats into the SSEN application form. All things are not as they seem though. I telephoned SSEN and learnt that they actually take the figures quite seriously and I need an ENA. They told me to call a supplier and ask for one. That sounds like it will introduce a degree of commitment I was not expecting at this stage. There was me thinking it would be ages before I needed to think about heating, I'm still thinking over which timber frame kit to buy. And of course if the cost of supply for the electricity is connection is beyond budget, I may have to source another plot. Can anyone offer me some advice on how to get an ENA, for a house that simply exists in my head at present. Thanks in advance Chris Link to comment Share on other sites More sharing options...
ProDave Posted February 11, 2020 Share Posted February 11, 2020 Pick a random ASHP, input the data from the manufacturer. Later on, choose the one you want or is best at the time. You are not tied to that one. Link to comment Share on other sites More sharing options...
SteamyTea Posted February 11, 2020 Share Posted February 11, 2020 Just now, ProDave said: Pick a random ASHP, input the data from the manufacturer. would it be worth picking one that is larger than you need? Not too large mind. So say you need an 8 kW one, pick a 12 kW. Link to comment Share on other sites More sharing options...
ProDave Posted February 11, 2020 Share Posted February 11, 2020 1 minute ago, SteamyTea said: would it be worth picking one that is larger than you need? Not too large mind. So say you need an 8 kW one, pick a 12 kW. Probably. I heat a similar size house with a 5kW ASHP, so if you said 12kW you would have covered a very worst case. Link to comment Share on other sites More sharing options...
Mally Posted February 11, 2020 Author Share Posted February 11, 2020 (edited) Thanks for such a swift response, That sounds like my plan. However as they use the figures in their design, I may be getting a quote for more than I need. Also, they require the EAN as part of the application for a connection. Edited February 11, 2020 by Mally Link to comment Share on other sites More sharing options...
SteamyTea Posted February 11, 2020 Share Posted February 11, 2020 25 minutes ago, Mally said: I may be getting a quote for more than I need You may be able to connect more PV to it though. Link to comment Share on other sites More sharing options...
Mally Posted February 11, 2020 Author Share Posted February 11, 2020 12 minutes ago, SteamyTea said: You may be able to connect more PV to it though. Do you mean solar panels ? Meaning I could upload more energy to the network ? Link to comment Share on other sites More sharing options...
SteamyTea Posted February 11, 2020 Share Posted February 11, 2020 1 minute ago, Mally said: Do you mean solar panels Yes PV = photovoltaic ST = solar thermal I am not sure how easy it is to go over the 16A per phase these days. A lot of it depends on what else is connected locally. Link to comment Share on other sites More sharing options...
Mally Posted February 11, 2020 Author Share Posted February 11, 2020 19 minutes ago, SteamyTea said: Yes PV = photovoltaic ST = solar thermal I am not sure how easy it is to go over the 16A per phase these days. A lot of it depends on what else is connected locally. Thanks so much for your input. Link to comment Share on other sites More sharing options...
ProDave Posted February 11, 2020 Share Posted February 11, 2020 Don't spend too much time on it. What you will be offered will depend on what is available. My offer was only a relatively low power rated supply. I agreed knowing our energy use would be low and knowing if I asked for more, it would cost a lot more. The reality is I get exactly the same supply as everyone else, with the same size cable and the same 100A main fuse, and I could if I needed draw all 100A from it. But I don't and I have no need to. What worries the DNO about heat pumps is the high start current that may make the lights dim. Totally a non concern if using an inverter driven heat pump, but there seemed to be no place to tick on their form to say it will be inverter driven, Link to comment Share on other sites More sharing options...
Mally Posted February 11, 2020 Author Share Posted February 11, 2020 30 minutes ago, ProDave said: Don't spend too much time on it. What you will be offered will depend on what is available. My offer was only a relatively low power rated supply. I agreed knowing our energy use would be low and knowing if I asked for more, it would cost a lot more. The reality is I get exactly the same supply as everyone else, with the same size cable and the same 100A main fuse, and I could if I needed draw all 100A from it. But I don't and I have no need to. What worries the DNO about heat pumps is the high start current that may make the lights dim. Totally a non concern if using an inverter driven heat pump, but there seemed to be no place to tick on their form to say it will be inverter driven, Thanks, that makes perfect sense. I've sent the enquiry away. Link to comment Share on other sites More sharing options...
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