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robl
@robl
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Honorable Member
Joined: Mar 23, 2022
Last seen: Oct 27, 2025
Profile Activity
Topics: 1 / Replies: 204
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Reply
RE: New Fogstar 15.5kWh upright solution

@ggw I think the cable to the unit needs to be double insulated if you can touch it. Ideally the twisted pair from the CT should be away from any ma...

2 years ago
Forum
Energy Storage
Reply
RE: Is your heat pump insured?

Personally I think it's only worth insuring stuff when your life would be really difficult without it. Home against fire, car, medical if you're on h...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Fogstar 15.5kWh upright solution

I used 50mm2 cable, sunsynk 3.6kW to 100A givenergy breaker to 280L fogstar. 50 is the largest that fits all the above.

2 years ago
Forum
Energy Storage
Reply
RE: Planning to add battery storage to existing solar in outbuilding

@wasz Note: If you're adding a 3.6kW inverter to a 1kW system, you'll have to ask your DNO if that's ok. G98 is the form I think. You get a total o...

2 years ago
Forum
Energy Storage
Reply
RE: Planning to add battery storage to existing solar in outbuilding

@wasz Yes! To be clear, we have 10 year old FIT PV, and more recently a 3.6kW sunsynk Ecco with a 15.5kWh battery. The 3.6kW Ecco inverter charge...

2 years ago
Forum
Energy Storage
Reply
RE: Planning to add battery storage to existing solar in outbuilding

East/West split is actually quite favourable these days, as PV payback is all about replacing self use now, rather than the FIT (which doesn't exist a...

2 years ago
Forum
Energy Storage
Reply
RE: Battery system for cheaper heat pump running

@geo3geo That graph I did is in excel (I think version 2006), using the best fit line it has built in. You can select linear / polynomial / lots o...

2 years ago
Forum
Energy Storage
Reply
RE: Battery system for cheaper heat pump running

Attached below is a link to more detail on our gshp system. It's over at buildhub - the first post there has a 3MB pdf where I left the details of wh...

2 years ago
Forum
Energy Storage
Reply
RE: Battery system for cheaper heat pump running

I'm glad you asked! It is very low, but it does work for us. The heatpump is diy - I guess I started building it with cheap parts for interest, thin...

2 years ago
Forum
Energy Storage
Reply
RE: Battery system for cheaper heat pump running

It's worth having a go at calculating your expected daily electricity use. Everybody is different, but I hazard a guess that the national average is a...

2 years ago
Forum
Energy Storage
Reply
RE: Navigating the World of Refrigerants In Heat Pumps: A Guide for Homeowners

My understanding is that manufacturers overstate their refrigerant benefits, generally suggesting they have the higher efficiency. There are so many ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do ASHPs work with poor insulation?

My EPC experience was pretty poor. Over the years I’ve made loads of home insulation improvements - and I pointed them out to sap guy, who was to be ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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