a neighbor just bought a house to resell next to ours . he had the electric company inspect his home before purchase and all seemed okay. Then 2 months later he got a letter stating his breaker box was out of code. The home is a little older than ours, his breaker box is the same manufacturer as mine. He claims that the breakers might not trip properly and could cause a fire so he had it replaced. It cost him $2000 for this repair. Because mine is only about 5 years newer (built in 1983) might mine need replacing as well? Is this common to need replacing? and $2000!!! that sounds extreme.

I was told I could use a switching power supply that is equivalent to the battery pack that has a short run time. In my case I was told I need an 18 volt with 20 amps available in the 300 - 500 watt range. I cannot find anything I can afford in this configuration. This brings up the question. If I use a power supply that is a quad, each supply rated at either 18 or 24, with 5 amps each connected in PARALLEL, will the available amperage go from 5 to 20,5x4, stay the same as the voltage does, or go down by a factor of 5? In series same question. If I use multiple single power supplies at 18volt/5amp same rules apply? I have many printer power supplies in the 18 volt, 3 amp range. I could use those in parallel if the available amps of each is multiplied by the number of supplies. Advice please.