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robl
@robl
Member
Honorable Member
2570 kWhs
Joined: Mar 23, 2022
Last seen: Mar 4, 2025
Profile Activity
Topics: 1 / Replies: 198
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RE: New Fogstar 15.5kWh upright solution

@ggw I had a lot of trouble with the sunsynk originally(ok, I still do…). New LiFePo4 battery, with the Seplos bms that talked with it, and yet I fou...

12 months ago
Forum
Energy Storage
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RE: New Fogstar 15.5kWh upright solution

@ggw While I’ve set it to work down to 1%, it’s an extremely rare occurance. Most of the time it cycles 90% to 50%. While I appreciate the degradati...

12 months ago
Forum
Energy Storage
Reply
RE: New Fogstar 15.5kWh upright solution

Screenshots from our Sunsynk. We have an old independent 4kWp FIT install, and our elec is Octopus Go. The sunsynk charges from night elec and PV, r...

12 months ago
Forum
Energy Storage
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RE: New Fogstar 15.5kWh upright solution

@misterb I'd originally intended to top balance in parallel. When I thought it through, it just seemed a lot of faff - how to compress the cells? ...

12 months ago
Forum
Energy Storage
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RE: New Fogstar 15.5kWh upright solution

@misterb Yes. In the case, compressed, with a capacitive active balancer. I think balancing should not be done uncompressed.

12 months ago
Forum
Energy Storage
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RE: New Fogstar 15.5kWh upright solution

We charged our 15.5kWh 280L system to 56V in AGM V mode (3.5V per cell) over the coldest months with Octopus Go, which is 100% or near enough. That w...

12 months ago
Forum
Energy Storage
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...

12 months ago
Forum
Energy Storage
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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...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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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.

1 year ago
Forum
Energy Storage
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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...

1 year 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...

1 year 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...

1 year ago
Forum
Energy Storage
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