TL4000 high pitched whining

infinity · May 28, 2012

SolarCity said:
I'd use a seperate DC isolator for each string. Not necessarily a requirement, but I think it's a good idea.

Me too, especially as you should use 2 poles for +ve and 2 for -ve to reduce switching arcing

SolarCity · May 28, 2012

infinity said:
Me too, especially as you should use 2 poles for +ve and 2 for -ve to reduce switching arcing

Depending on the method of disconnection of the DC switch. 'True' DC switches should only require 1 pole.

whinmoor · May 28, 2012

We tend to use one DC isolator per string. Don't like penny-pinching. Glad others agree. This type of wall is soft and crumbly which the clips wouldn't easily grip into so that's why there's loads of them. Anyway, it's in a loft where the homeowners rarely go so the appearance isn't a huge issue.