My experience with reinstalling solar is as follows:
1. A permit is required. The original plans can be submitted and pictures prior to disassembly is requested. Bear in mind that a lot changes with solar frequently. Each particular racking manufacturer has installation instructions to be followed. That necessitates access to installation instructions. Depending on the age of the racking, there may not be integrated grounding and lay-in lugs are required on each panel and all of the various pieces of the racking. The individual support feet might be exempt from bonding.
Most inspectors have not seen the "old way" and probably don't look closely at the physical aspects of a solar array. For one they can't get close and all of the panels obscure the racking.
Here is a link (
Link here) to a page at L.A. County B/S that has a list of current racking companies with the installation instructions. I used to be the person that vetted the installation instructions before the racking was allowed to be installed in L.A. County. I have been away from that for two years and I can't vouch for the accuracy. One difficulty to overcome is that none, or almost none, of the racking companies have any marking on the product. No Logo, no name, no part number, no UL ....nothing. A few have a mark on the hold down hardware.
2. Moving to a ground mount is a start from scratch situation. Racking companies are required to publish a list of panels that have been evaluated with their racking. Odds are slim that your panels qualify however, the reason for the evaluation has to do with the geometry of the profile to be assured that is will be secured and the integrated grounding, The profile will not change so it might work and perhaps not. The integrated grounding might be handled with lay-in lugs and individual bonding. That can happen if the local AHJ approves that.
If there is a stand alone inverter, it might be outdated to the point that it would not be allowed for a new system.
Know that I have touched on some of what is involved and I am not an expert on the subject. Many roofers will simply remove and reinstall for a price without involving the AHJ. Some solar companies offer the service as well. It comes down to what the AHJ determines to be prudent.