I was taking off my 2, 2003 75 watt BP solar panels
to replace them with a single
275 watt LG neon panel . These panels
were from before the time of MC 4 connectors so they have junction boxes mounted to the bottom of the panel to make connections in . when we opened one of the boxes the connection block was melted in 3 pieces the diodes where fried in half . The system is properly fused but not blown and there was no indication of heat damage either to the plastic box or either surface of the panel. The wires are still in good condition . My first thought was fire but I would have expected more surface damage ,maybe a small explosion.
What do the boffins think