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Hi, I'm just getting a few quotes back on the installation of an in-roof system of 3.84 - 4.2kWp array of 12 PV panels, facing SE with no tree shading whatsoever but potentially a small chimney flue. I am tempted by the Eddi by MyEnergi or iBooster addon divertor to use any excess electricity to be diverted directly to my hot what cylinder to boost the heat and not waste what's been generated. Are these diverters worth the investment? I'm told Eddi is better because of it's more advanced & potential future linkup with battery storage etc. It's fractionally more money than the iBooster.

Hi - hoping for some thoughts / advice? I just had a solar pv system commissioned on my 22 year old house. Two storey semi detached. I've had a small amount of excess so far and my mind started wondering how best to use it....I was too late with the blue pills..!!! So, the PV system has an Eddi diverter keeping the upstairs hot tank at 60oC when there is excess. It makes me really want to use the hot tank more than I do currently. I'm also thinking about how to solve a problem I have in the kitchen. Current Hot water cylinder usage: Upstairs hot taps Ensuite Shower (1 adult user, hot flow is ok but not great) The odd bath Kitchen Sink There is an electric shower in the main bathroom that myself and one other adult uses, 3-5 minute short showers each. Flow is good enough from cold tank in attic. PV System: 4.2kw PV array, 6kwh battery, Eddie diverter to immersion Gas Heating - standard condensing boiler (not a combi) and radiators with Thermostatic valves Issue #1: The kitchen hot tap has a 30 second dead leg - 1/2 inch copper pipe feed Issue #2: Options for Triton electric shower in main bathroom - can I use the hot water tank instead? Issue #3: Best use of any additional Excess PV #1: Currently the electric shower and screen are mounted at the foot of the bath. The hot water tank is on the other side of the wall at the foot of the bath. The ensuite is 6 feet away. The existing bath shower hot head pressure isn't the best, it might just be the old hose though. I'd like to use the hot tank for showers but have a fallback like an in line Siebert Eltron system that only kicks in if the water isn't hot enough to give the 38oC shower needed. Maybe add a Digital shower but am concerned about the hot water pressure as I'm on the same level as the tank. #2: For the kitchen I've been looking at instant hot water taps, the Grohe model mixes with the dead leg water and provides hot water until the hot tank water arrives downstairs. I have capacity for some additional background load given I have a battery. Some type of insulated storage tank that buffers the dead leg and keeps itself at 60oC or so would be ideal. I'm trying to avoid paying for more filters though as I've a 6 stage filtration system at the kitchen sink with its own tap already, unless I can integrate that. Instant boiling water would be nice though! I can't see how I'd be able to add a re circulation circuit into an existing house but is that an easy or difficult option? I've no return pipe for it.... #3: One more option I'm considering is adding a second output to the Eddi and connecting it to an LHZ electric heater in the living room - it's the coldest room in the house, 3 outside walls. Undersized Radiator. I'll be doing triple glazed windows and external wall insulation at some point but thought having a second use for excess useful - we have no FiT currently. Might not be enough excess in winter when it's most needed though..... It's great to see the house doing something it's never done before.