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robl
@robl
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Honorable Member
2365 kWhs
Joined: Mar 23, 2022
Last seen: Jul 20, 2024
Profile Activity
Topics: 1 / Replies: 184
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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? ...

4 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.

4 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...

4 months ago
Forum
Energy Storage
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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...

4 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...

4 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.

5 months 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...

6 months ago
Forum
Energy Storage
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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...

6 months ago
Forum
Energy Storage
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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...

6 months ago
Forum
Energy Storage
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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...

6 months ago
Forum
Energy Storage
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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...

6 months ago
Forum
Energy Storage
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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...

6 months ago
Forum
Energy Storage
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