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[Sticky] Home energy storage & battery register

 
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Energy Storage
50 Posts
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 Old_Scientist
(@old_scientist)
Honorable Member Member
Joined: 2 years ago
Posts: 405
11/07/2025 10:22 pm  

Tesla PW3 (13.5kW) and Gateway for full home backup.

 


Samsung 12kW gen6 ASHP with 50L volumiser and all new large radiators. 7.2kWp solar (south facing), Tesla PW3 (13.5kW)
Solar generation completely offsets ASHP usage annually. We no longer burn ~1600L of kerosene annually.


   
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Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2734
11/07/2025 10:33 pm  

@old_scientist 😊 Toodles


Toodles, heats his home with cold draughts and cooks food with magnets.


   
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 AgentGeorge
(@agentgeorge)
Estimable Member Member
Joined: 1 year ago
Posts: 171
26/11/2025 10:21 am  

Battery 1 x 5kWh Growatt, would consider a second when prices soften

I don't have a Hybrid Inverter ( which has the H, SPH)

Growatt PV Grid Inverter MIN 5000TL-X

SPA 3000TL

Growatt AC Coupled Inverter SPA 3000TL BL


supplied and fitted by my home solar who I’d recommend getting a quote from.



   
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Batpred
 Batpred
(@batpred)
Prominent Member Member
Joined: 1 year ago
Posts: 874
26/11/2025 7:49 pm  

2 days uninterruptible power supply (at the moment) with Solis 8kW and 16kWh lifepo4


8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC


   
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 williamp
(@williamp)
New Member Member
Joined: 5 months ago
Posts: 2
07/12/2025 2:55 pm  

@batpred I'm looking at Fogstar batteries with Solis as an alternative to Dyness, how do you find them?



   
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 williamp
(@williamp)
New Member Member
Joined: 5 months ago
Posts: 2
07/12/2025 2:58 pm  

I have Solax X1-AC with 5.8kWh.   Last month we installed Solis 3P Hybrid with a fabulous Dyness HV stack.   next project will probably be single phase Solis with either another Dyness stackable or the Fogstar.   



   
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Batpred
 Batpred
(@batpred)
Prominent Member Member
Joined: 1 year ago
Posts: 874
08/12/2025 7:13 pm  

Posted by: @williamp
↑

@batpred I'm looking at Fogstar batteries with Solis as an alternative to Dyness, how do you find them?

Most of my findings on batteries are in the thread that this link points to. Regarding the inverter, the Solis hybrid exceeded my expectations. 

 


8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC


   
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TechnoGeek
 TechnoGeek
(@technogeek)
Estimable Member Member
Joined: 3 years ago
Posts: 174
08/12/2025 7:52 pm  

Now the proud owner of:

4.1Kw peak Aiko Neostar solar panels (south facing)

GivEnergy Gen3 hybrid 10Kw inverter

GivEnergy 34Kwh HV stackable batteries


5 Bedroom House in Cambridgeshire, double glazing, 300mm loft insulation and cavity wall insulation
Design temperature 21C @ OAT -2C = 10.2Kw heat loss, deltaT = 8 degrees
Bivalent system containing:
12Kw Samsung High Temperature Quiet (Gen 6) heat pump
26Kw Grant Blue Flame Oil Boiler
4.1Kw Solar Panel Array
34Kwh GivEnergy Stackable Battery System


   
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 upnorthandpersonal
(@upnorthandpersonal)
Eminent Member Member
Joined: 3 months ago
Posts: 25
12/02/2026 5:59 pm  

I have 120kWh of LiFePO4 batteries (DIY), which I will likely expand this year to 200kWh. The original configuration 7 years ago was 28kWh with cells directly imported from a dubious source in China (as we all did back then in the DIY community). Over time I just kept adding as prices got better, and things really got easy when cells became readily available from European vendors such as NKON (and Fogstar in the UK).


My blog where I write about all the systems in place and decisions made for my off-grid house at 63 degrees north in Finland.


   
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Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2734
12/02/2026 6:05 pm  

@technogeek Well done, I like the inverter power rating and I am envious of the battery capacity!😉 Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
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TechnoGeek
 TechnoGeek
(@technogeek)
Estimable Member Member
Joined: 3 years ago
Posts: 174
12/02/2026 6:39 pm  

@toodles cheers! Had to size the batteries /inverter based on keeping the ASHP going all day plus general power consumption and being able to charge it all within 5 - 6 hours overnight. This means the EV remains feasible and ASHP is now cheapest form of heating.

Hopefully we can be financially grid independent over the summer with a little export but that will be a bonus

Regards


5 Bedroom House in Cambridgeshire, double glazing, 300mm loft insulation and cavity wall insulation
Design temperature 21C @ OAT -2C = 10.2Kw heat loss, deltaT = 8 degrees
Bivalent system containing:
12Kw Samsung High Temperature Quiet (Gen 6) heat pump
26Kw Grant Blue Flame Oil Boiler
4.1Kw Solar Panel Array
34Kwh GivEnergy Stackable Battery System


   
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Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2734
12/02/2026 6:48 pm  

@technogeek Sounds like we have similar aims; with 27 kWh of Powerwall2 (the Gateway handles 10 kW in either direction comfortably), and an ASHP, I subscribe to Octopus Cosy and can cruise through the full day using just the lowest 8 hours charge times to keep some energy in the bank. Our 8.1 kWp. of solar panels are not ideally orientated and do suffer from some shading but during the summer, I hope to export via Intelligent Octopus Flux for a few months. Regards, Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
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