SmithHSC
New Member
We have just had solar panels installed for our home (yesterday). I am looking into replacing two water heaters with tankless heaters. I currently have one whole house water heater (double pole 30 amp breaker in main service panel) and a smaller water heater in an addition with one shower and one sink (double pole 30 amp breaker in sub panel). My question is about the capacity of my panels and what I can add to them. My explanation may be lengthy and I apologize.
The main service panel has had a 150 amp main breaker. In this panel are four 20 amp single breakers, one 15 amp single breaker, one 20 amp double pole breaker, two 30 amp double pole breakers, one 40 amp double pole breaker, two 50 amp double pole breakers, and one 60 amp double pole breaker. I believe that one of the 50 amp double pole breakers leads to the sub panel.
There are three 20 amp breakers, not included in the description above, which were removed from the main service panel and placed outside with the solar panel equipment. I don't have a grasp on how that impacts the capacity of the main service panel now. There are now at least five single slots available for use in the main panel.
My first question is about the main service panel. If I get a tankless water heater, obviously I would be replacing on 30 amp double pole breaker with a larger amperage. How much can I add to this panel as it stands now?
My second question is similar. If I get a smaller tankless water heater for the sub panel, replacing a 30 amp double breaker in the sub panel, how much can I add to the sub panel. For logistics reasons we cannot use just one water heater for the entire house.
Thank you for enduring my lengthy post and for your advice.
The main service panel has had a 150 amp main breaker. In this panel are four 20 amp single breakers, one 15 amp single breaker, one 20 amp double pole breaker, two 30 amp double pole breakers, one 40 amp double pole breaker, two 50 amp double pole breakers, and one 60 amp double pole breaker. I believe that one of the 50 amp double pole breakers leads to the sub panel.
There are three 20 amp breakers, not included in the description above, which were removed from the main service panel and placed outside with the solar panel equipment. I don't have a grasp on how that impacts the capacity of the main service panel now. There are now at least five single slots available for use in the main panel.
My first question is about the main service panel. If I get a tankless water heater, obviously I would be replacing on 30 amp double pole breaker with a larger amperage. How much can I add to this panel as it stands now?
My second question is similar. If I get a smaller tankless water heater for the sub panel, replacing a 30 amp double breaker in the sub panel, how much can I add to the sub panel. For logistics reasons we cannot use just one water heater for the entire house.
Thank you for enduring my lengthy post and for your advice.