Solar panels on roofs are great, but how they’re installed matters. If you see neat, well-secured wiring in conduits or trunking, fixed to walls or supports, it usually means someone took care.
If instead you see loose cables looped around, wires lying directly on the slab, or random junctions exposed to sun and rain, it suggests a rushed job. Messy wiring is more vulnerable to damage, water ingress, and future faults.
Neat work on the part you can see often reflects the standard of work in parts you can’t.