I currently have 200 amps coming to my house. This panel was added about 8 years ago when the house was totally remodeled. If I add up the circuit breakers on the main panel box, it looks like I have 500 amps worth of circuit breakers. (See image below.) From the main panel, a 40 amp line runs through the house to an attached garage approximately 50 feet away. The garage is about 30 years old and the subpanel is pretty full. It appears to have 120 amps worth of circuit breakers installed. The subpanel in the garage powers 3 garage door openers and lights, over a dozen 5-15 outlets, exterior lights and a NEMA L6-20 outlet. In another thread, Upgrade old NEMA 6-20 outlet?, I asked about upgrading my NEMA 6-20 outlet. I received lots of helpful suggestions but haven't made any changes yet. I plan on adding NEMA 14-50 outlets to the other two bays in the garage. From the garage subpanel, the lines would have to be run about 15 feet and 50 feet respectively, so I'm guessing 6 gauge wire would be required. Questions: 1. Should I be concerned that the 200 amp main panel has 500 amps of circuit breakers and the 40 amp subpanel has 120 amps of circuit breakers installed? 2. If I shouldn't be concerned about #1, would I be able to upgrade the NEMA 6-20 to NEMA 14-30? The 6-20 outlet is currently on 12 gauge wire but only about 6 inches from the subpanel so it wouldn't take much to upgrade it to 10 gauge. If I can't upgrade, I'll probably use a pigtail adapter or change the outlet to 5-20 based on suggestions in the other thread. 3. Should I have a new 100 amp line run to the garage (via the main panel) or is my current 200 amp line sufficient? I assume I need 100 more amps and because the main panel is already totally full, they would have to swap out the main panel in order only use one meter. Is this a correct assumption? Would it be better to get a new meter and panel for the 100 amp line or would this result in two power bills each month? Let me know if you have any questions concerning my current setup and I'll do my best to provide answers. I already had one electrician out and he wanted $5000 for running a hundred amps plus $500-$1000 per charger. The funny (sad) thing is I didn't ask him to install chargers but had asked for 2 14-50 outlets so that I could do the 'install' myself by plugging in a UMC or EVSE. I don't trust his estimate at all. I've tried calling a few other electricians in order to schedule estimates but everyone has been very flaky so far, not returning calls or emails. :crying: Thanks in advance for any advice!