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Keeping External CYG Skyline Batteries Warm

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(@alanb)
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187 kWhs
Joined: 2 years ago
Posts: 16
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Hello. I have 4x 5.2 kWh CYG Skyline batteries and 2 x 6kw Inverters  installed outside by EB Solar. No room inside near consumer unit. No warning not install outside was ever given by System manufacturer or Installer.

It has become clear that performance drops off a cliff near freezing. The Skyline system boasts a state of the art battery warming system, so you can install outside. My experience shows this does not work.

I intend to have a lean to shed built around the 2 all in one systems and will make sure this is insulated when the builder is free to construct it.

In the meantime, I have ordered some waterproof external insulation blanket to wrap around the battery casings. The systems are wrapped in breathable roofing membrane at the moment to keep out the rain and allow the subsystem to breathe.

Any views on this very welcome. Thank you

Alan

IMG 8844

 

This topic was modified 3 months ago by AlanB

   
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Dunlorn
(@dunlorn)
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1632 kWhs
Joined: 1 year ago
Posts: 74
 

Hello @AlanB. I've a similar situation to you, albeit my batteries are Puredrive. No space internally so they went on an outside wall. Obviously IP-rated for external but I'd failed to appreciate how cold temperature impacts them. Charging current drops to a few hundred Watts once temp is around 3°C and then stops completely once it gets to zero or below.

I'm about to have a small timber lean-to built around mine, with 50mm Kingspan surrounding the batteries. I contacted Puredrive and they told me it was fine for the insulation to be in close contact against the batteries as long as I left the controls at the top accessible. I've also bought an 80W tubular heater to sit underneath the batteries, within the enclosure. I'm sure this will keep them warm enough. The small power penalty is worth it to take advantage of Cosy time rates to fill the batteries.

2 x 12kW Samsung Gen6 ASHP, 5.6kW solar PV ground mounted c/w 10kWh Puredrive battery & Solis inverter.


   
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(@alanb)
Trusted Member Member
187 kWhs
Joined: 2 years ago
Posts: 16
Topic starter  

@dunlorn Thanks for your reply. Please keep me posted on your shed and heater. I'll let you know if simply wrapping the batteries in insulation has any effect. The CYG Skyline batteries are supposed to have built in warmers. However, I can find no confirmation that they do and am awaiting on CYG reply from their UK arm, Cambridge Renewables.


   
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(@judith)
Eminent Member Member
268 kWhs
Joined: 3 months ago
Posts: 14
 

We have a givenergy 9kWh battery and it recommends a rain-snow roof shelter. Discussion with other users says batteries don’t like the cold. One way to help all batteries keep themselves warm is to charge them overnight, adjusting your charging rate for all of your low price period to keep it steadily warm. 
Your new enclosure needs to have removable panels for summer since no battery likes it too warm either.

6kW PV south-facing roof 9.5kWh Givenergy battery. MVHR. Investigating ASHP


   
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Dunlorn
(@dunlorn)
Estimable Member Member
1632 kWhs
Joined: 1 year ago
Posts: 74
 

Hello @alanb.

Wee heated lean-to enclosure now built and in operation. I've a wireless thermometer that's telling me it's 2.1°C inside (it's about -1 outside) so it's starting to make a difference, although really I need it to stay above 5°C I reckon to have full charging capacity.  I need to get a few brush edging strips to seal the odd gap and time will tell whether 80watts worth of tubular heater is sufficient for the task! 

IMG 20231205 133552

2 x 12kW Samsung Gen6 ASHP, 5.6kW solar PV ground mounted c/w 10kWh Puredrive battery & Solis inverter.


   
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Toodles
(@toodles)
Noble Member Contributor
3890 kWhs
Joined: 1 year ago
Posts: 586
 

@dunlorn Is there any ‘loft insulation’ under that roof?😉 Seriously though, a background heat of 80 watts should keep the frosts out if the insulation is sufficient. Otherwise, do you have a dog? 😉. Regards and Respect, it looks very neat! Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!


   
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Dunlorn
(@dunlorn)
Estimable Member Member
1632 kWhs
Joined: 1 year ago
Posts: 74
 

Thankyou @toodles, I am feeling quite pleased with myself I must admit. 50mm Kingspan all round but they are still fixed to a cold stone wall sucking the heat out and 2m away from my heat pumps expelling freezing air 😱 so it has some work to do! 

I'm now thinking of what tools I need want to spend with the money I saved building it myself! 

2 x 12kW Samsung Gen6 ASHP, 5.6kW solar PV ground mounted c/w 10kWh Puredrive battery & Solis inverter.


   
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(@alanb)
Trusted Member Member
187 kWhs
Joined: 2 years ago
Posts: 16
Topic starter  

@dunlorn Hi Simon. Hmm impressive enclosure. Fancy a trip to Bucks to fit on for us?? 

I have now fitted foil faced insulation to the 4 batteries and it's made a difference. Will now fully charge during our 2 x 3 hour cheap periods down to -1C. Any worse than that its around 50% max charge.

Our installers have accepted that they should have known about the cold issue and warned us. They were also told by CYG that the batteries have heaters built in, which they don't as it's an optional extra. They are taking up issue with CYG.

They have offered to pay for a lean to shed to be built ? Just got to get a quote from our local builder now...which may be a problem. We will need to have something bit larger than yours and with a tiled roof as its on a semi prominent part of the house.

 

Cheers Alan


   
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