Thread: Mppt inverters for direct coupled solar
View Single Post
Old 04-28-16, 07:57 PM   #8
Kramer
Lurking Renovator
 
Join Date: Apr 2016
Location: South Carolina
Posts: 15
Thanks: 1
Thanked 1 Time in 1 Post
Default
It made a whistling sound in heat mode, but it was not loud and it was on my bedroom wall.
Kramer is offline   Reply With Quote