question

anssi avatar image
anssi asked

SmartSolar 75/15 closed casing

Hi! I would need to install a SmartSolar 75/15 basically in the middle of an ocean. The conditions will be rough and therefor I would need to have the charger in a IP67 closed casing. I'm sure this is not recommended because of the heat produced by the unit, but I was wondering if there was a way.

If I had the wall of the casing made of a metal heatsink and the 75/15 attached to the heatsink with some cooling compound (such as used in CPUs) between the back wall of the 75/15 and the heatsink, could this have a chance of working?

MPPT Controllers
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

3 Answers
wkirby avatar image
wkirby answered ·

These MPPT's are 98% efficient, so at full output power on a 12V battery about 4W will be lost as heat (~8W on a 24V battery).
Mounting the MPPT to a metal plate with heatsink compound would certainly help.

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Erik Sporns avatar image
Erik Sporns answered ·

I have a 100/30 with 270w of solar mounted in a similar arrangement and i never had overheating issues.

Space is completely unventilated, only marginally larger as the mppt and only half of the cooling fins are touching ~30°C warm metal.


2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

anssi avatar image
anssi answered ·

Thanks for the replies, this gives me confidence to move on!

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.