On 5/6/2016 1:57 PM, Dennis vreeken wrote:
I am hoping someone out there can help as the controller in my trailer is defective. it is an older model # OS1
Thanks in advance, Dennis

Small solar controllers are cheap and plentiful these days.

For example:
http://www.amazon.com/Sun-YOBA-Switc.../dp/B00PVOC11G