It appears you are getting an RMA. You are lucky. I can't even get a response/acknowledgement of correspondance from them now.
I started this thread on Sept 6th.
https://diysolarforum.com/threads/e...500vdc-100a-mppt100-48hv-sets-code-f01.68669/ Received an email on the 13th saying they closed my case even though I sent them the requested photos and video on the 12th. The email claimed I hadn't responded in 7 days but I had responded in less than 7 days. They wanted a video of the code setting and it doesn't always set everyday so I waited to see if I could catch it.
Have sent another email to the tech handling my case, no response. Clicked on the link in the email that links to the support page for my case, it shows closed and allows you to send a message thru it. Sent that thru today, no response or acknowledgement from anyone at Signature Solar.
I will be working on the Youtube review for this product and will include a review of the customer support at Signature Solar. It is quite possible they are ghosting me as they don't have any units in stock for a RMA, nor do they have any idea why this code sets intermittently.
The company is starting to become a joke on how it is run. I've never in 37 years of operating my business seen a company so unfocused on providing positive customer support. I was even told it could be installer error but when I responded I've had one of these running since July 4th and the second one ran for over 2 weeks before it started setting an intermittent bus start failure code, how could it be possible to be installer error? It's a charge controller, PV positive goes to the positive marked terminal and negative to the negative terminal. The battery connections are the same, positive and negative. There isn't anything else except a ground wire to the case.
I thought I'd give them a second chance after the 6500EX inverter problems and support did come thru and refunded my money but this latest episode is a huge failure on their part.