we have made solar system products over 10 years
If you are alreay our regular customers we can provide the spare parts for free, but we don't affort the shipping
Yes, we have installation manual for every item we made
When you placed the trial order we have to charge the cost, if the sample is suitable for your using, then you place the bulk order, we will reduce the sample fee for you.
we are a manufacturer, our factory located in Foshan, China
