A 100 amp panel from the 1970s was fine for a fridge and a furnace. It is not fine for a heat pump, an induction range and a car charger. AAA Electric upgrades homes in Rock Hall, MD to a 200 amp service with a new panel, main breaker, grounding electrode system and bonding brought up to current code.
We pull the permit, coordinate the utility disconnect and reconnect, and label every breaker when we are done. If you have a Federal Pacific Stab-Lok or a Zinsco panel, replacement is the only safe option, and we will tell you that plainly.