Our house is mid 1990's with 200 Amp service. The meter is on a garage wall (attached to the house) and the panel is in the laundry room about 20 meters / 60' distant. I'm not sure how the panel feed runs from the meter, but think it may be under the garage slab, entering the house via the crawl space. The panel is 100% used, although many circuits serve only one or at best a few outlets.
The issue I have is that the original owner only put 1 15 amp service to the garage.
I am a wood worker and plan to buy an electric vehicle in the next year or so, so want more circuits to the garage - 120 and 240V, but as the main is full and the garage is on slab, this is not a simple proposition.
What I would like to do is add a new panel in the garage, on the inside wall directly behind where the meter is located. My thinking is to make it the main panel, with the existing panel converted to being a sub panel.
In the new garage panel, there will be a need for 60-100 Amps to feed the new ccts for power tools and a vehicle charger. The rest of the power in the house will be unaffected.
The major power users currently on the main panel are a heat pump and electric hot water heater. The heat pump (60A) can be moved to the garage panel fairly easily, the hot water tank cannot.
My question, before bringing in electricians to quote on the job, is whether / how I can achieve my goal. Is it feasible to convert the existing main to a sub panel & bring all power from the meter to the new garage panel and then feed the existing panel from it or is there something else I need to consider?