Hi beatminister. Thanks for the comment. The way it is wired doesn't cause a short. I have 4 24vt banks wired just like this. I'll have a upcoming video soon on how to wire the batteries. I use 6 volt batteries to get more power amps. You can't use a vehicle battery on a solar power system because a car battery discharges all at once unlike solar batteries or golf cart batteries. Solar batteries and golf cart batteries discharge slowly. I wired my solar panels in three tandem which produces 72vt to 98vt when the sun is shining directly on them. Some controllers like the midnight solar can overload the volts. My house is running off 120vt and 240vt AC power pure sine wave at 60 hertz. My system is a 8.5 kw running a 3 bedroom house with inground pool. We don't us DC power to power our homes in the US that's why the power inverter is needed. The solar panels and battery bank are all DC power. Hope this answers your questions. Stay tuned for more in depth videos.
RE: D.I.Y. SOLAR POWER SYSTEM BY @davethediyguy BEING ENERGY INDEPENDENT Part 2