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How can I cool inverter and batteries during hot spells?

 
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 David999
(@david999)
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Joined: 2 years ago
Posts: 341
Topic starter 05/06/2026 2:56 pm   [#3042]

My loft is toast during the hot spells and currently I leave the door open but was thinking something more technical, like a fan.  I was looking at a vortex controller for gardeners but uncertain if the switching works the same as the room stat I have switching in the wrong direction. I have bathroom fans spare but a suitable thermostat is the issue.  

Any ideas from other folk what and if they try to cool inverter and batteries. 


This topic was modified 4 hours ago by Mars

   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
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Posts: 1852
05/06/2026 3:19 pm  

I'd've thought something like this would do

https://www.amazon.co.uk/dp/B07W96HH2S?ref=emc_s_m_5_i_atc

I hasten to add, that link is for illustrative purposes only, not as a recommendation. However, it does show the basic idea that you can programme a temperature and have it activate an electrical socket above that temperature where a fan or other cooling system is plugged into that socket.

The more important point, though, is that the fan won't do any cooling; it'll only move air. In your situation, I suspect I'd install some ducting going down to the soffits so that a fan or fans can blow warm air out of the loft void entirely and so achieve some practical level of actual cooling.


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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 David999
(@david999)
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Joined: 2 years ago
Posts: 341
Topic starter 05/06/2026 3:38 pm  

Posted by: @majordennisbloodnok
↑

I'd've thought something like this would do

https://www.amazon.co.uk/dp/B07W96HH2S?ref=emc_s_m_5_i_atc

I hasten to add, that link is for illustrative purposes only, not as a recommendation. However, it does show the basic idea that you can programme a temperature and have it activate an electrical socket above that temperature where a fan or other cooling system is plugged into that socket.

The more important point, though, is that the fan won't do any cooling; it'll only move air. In your situation, I suspect I'd install some ducting going down to the soffits so that a fan or fans can blow warm air out of the loft void entirely and so achieve some practical level of actual cooling.

yup going to remove a tile and slip in a vent tile.  Got the fans  just need a thermostat. 

 



   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
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Joined: 4 years ago
Posts: 1852
05/06/2026 3:44 pm  

Sounds good, @david999, although I suspect you'll need several vents and plenty of forced-air movement to achieve the level of cooling you're after.


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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