Spud312r

Exactly what I was looking at To satisfy the DNO a separate 5-7kW grid tied PV/inverter with export limited feed into the grid and providing normal AC loads and then 15kW PV/inverter (Victron) and 14kW Pylontech Force L2 14.21Kw Storage for the critical AC loads Well something like that - its depends on the DNO G89 application/certification/approval ? Current worse case house electric day usage during winter is around 26kWh , with new passive house with ASHP I expect this to be lower All from single phase 100A supply ?!?!

lol sorry I meant PV .. EV point will be added for future usage

Thanks for that . I will ask if dual (2 x single phase) could be provided , will that allow me 2 x 7kW EV inverters or a single 15kW EV inverter with and export limiter set for 14kW spread over L1/L2 I am not really bothered about exporting back to the grid, but it all helps, its the grid backup that's important with max PV/Storage size that I need, required to power house/heating/water and medical equipment and the ASHP (Stiebel Eltron WPL 25 AS - SCOP (EN 14825): 4.39) As my wife is disabled and the house just being electric, the idea is to have a EV/inverter setup and large battery storage in case we have power failure as she needs to have constant power supply for her medical equipment

Thanks but possible to have 2 phase (2 x single phase )??

Hi all We are about to demolish a small bungalow and build a new 2 storey home for my disabled wife with PV/Storage and ASHP etc Currently we have single phase 100A supply and would expect to be limited to the normal PV export limit of 3.6kW from our DNO UKPN Looking at the substation/transformer and UKPN Mapping I can see its a HV Transformer High Voltage 1kV -> 22kV Control Zone = 11kV Chelmsford South Voltage = 11kV The power supply will be repositioned and terminated in a new GRP during the demolition/groundworks phase and our neighbours power line will be moved from going over our land to under it . How can I check if the transformer is capable of 2 phase supply as that would give us a better PV export limit and what. kind of cost would I expect. We had a UKPN survey to talk about relocating our neighbours powerline and I asked about 2 phase supply and he just mentioned the transformer would have to be upgraded/replaced ? When I see 2 powerlines coming to the transformer does that indicate possible 2 phase supply ??

Greetings all We are building our retirement home for my disabled wife so will be asking novice questions - so please bare with us 👍