Can I upgrade from a 120V to 240V?
1 Answer. Show activity on this post. IF the outlet is the ONLY outlet on the circuit, it’s perfectly fine to change it to a 240V outlet (or disconnect, given it’s for a heat pump) and change the breaker to a two-pole 240V 15A breaker – all your 120V wiring is already rated for 250V if not 600V.
How much does it cost to convert 120 to 220?
The price to install a 220v outlet varies greatly depending on your area, the difficulty of the installation, and whether or not you have the skills to install it yourself. It may cost just $100 or exceed $1000. The average price you can expect to pay is $300.
