We use Hilti screws alongside the Hilti mounting system. This is due to them being one of the only companies that I know of that offer a full guarantee with their mounting systems. Other mounting system manufactures guarantees are affected depending on which screws/coach bolts you use alongside them. Before we found this out we were using decking screws from Travis Perkins as these felt strong and reliable. Plus with both of these products you don't have to pre drill holes
Reply to the thread, titled "What fastners you using?" which is posted in Solar PV Forum | Solar Panels Forum on Electricians Forums.
Best EV Chargers by Electrical2Go! The official electric vehicle charger supplier.
OFFICIAL SPONSORS
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc