I really agree with you. The idea of a homebuilt powerwall sounds really cool. But it's not something I would come close to working with.
Awhile ago I did a some volunteer work at a radio station. One of my tasks was to check for arcing. That involved going into the transformer room, disabling the safety systems, unracking some of the electrical components, powering the system on, turning off the lights and then looking for flashes from electrical arcs. It also involved going out at night with night vision goggles to check for arcing on the antenna. If we saw anything we knew what needed to be fixed. Safety was important there, but I developed a healthy respect for electricity. After working there I'm a little freaked out about the idea of dealing with high voltage systems.
Awhile ago I did a some volunteer work at a radio station. One of my tasks was to check for arcing. That involved going into the transformer room, disabling the safety systems, unracking some of the electrical components, powering the system on, turning off the lights and then looking for flashes from electrical arcs. It also involved going out at night with night vision goggles to check for arcing on the antenna. If we saw anything we knew what needed to be fixed. Safety was important there, but I developed a healthy respect for electricity. After working there I'm a little freaked out about the idea of dealing with high voltage systems.