Okay, let's break down your situation and explore your options.

Understanding the Issue: Load Calculation and "Removed" Loads

The core problem is that electrical code requires you to calculate the load based on all connected appliances, unless something is demonstrably and permanently removed. Simply switching off a breaker doesn't equate to removal in the eyes of an electrical inspector. They assume that at any point, someone could switch that breaker back on, adding that load back to the panel.

Does Switching Off the ACs Create Capacity? Technically, No. Merely switching off the breakers for the ACs is highly unlikely to satisfy an electrical inspector that the load is no longer present. They will assume the ACs are still connected and could be used. This means those 35 amps per AC unit will still be counted in your load calculation.

Will adding 4 heat pumps , each rated for 15 amp each be in compliance of electrical code ? Highly unlikely: The ACs alone are 70 amps load. Four heat pumps will add 60 amps of additional load (4 X 15 amp = 60 amp). The panel will now exceed it's rated load capacity.

Alternative Solutions and Considerations

Here's a breakdown of potential paths forward, ordered from most likely to be compliant to least likely:1.

Officially Decommissioning and Disconnecting the Old ACs



This is the most straightforward and compliant option. You need to physically disconnect the AC units from the electrical wiring. This means disconnecting the wires at the unit itself and ideally removing the wiring back to the breaker box. Have a licensed electrician do this and document the disconnection. Documentation is key. Get a letter from the electrician stating that the AC units have been permanently disconnected and decommissioned, so they are no longer part of the electrical system. This documentation is presented to the city when you apply for the permit to install the heat pumps. The Advantage

This removes the 70 amp load from your load calculation, freeing up enough capacity for your new heat pumps (60 amps).2.

Load Shedding / Load Management System

This involves installing a device that prevents the AC units and heat pumps from operating simultaneously. It monitors the current draw and can automatically shut off one set of appliances if the other is running, preventing the panel from being overloaded.

Requires Approval

This must be approved by your city's electrical inspector before installation. They will need to see the specifications of the load shedding system and be convinced that it provides a reliable safeguard against overload.

Important Considerations

The load shedding system must be listed and labeled for its intended use. It must be properly installed by a licensed electrician. You'll need to demonstrate to the inspector how the system works and ensure they are comfortable with its functionality.3.

Derating the Tesla Charger

If possible, consider derating the Tesla charger. You can often adjust the charging amperage in the Tesla vehicle settings. Lowering the charging amperage reduces the load on the panel.

Limitations

This might not free up enough capacity for all four heat pumps. It also slows down charging.

Still Requires Recalculation

You would need to recalculate the load with the reduced charger amperage and submit that to the city.4.

Subpanel Replacement/Upgrade (Least Likely, but Possible)

Maybe. If your existing subpanel is physically incapable of handling the potential load, you might need to replace it with a larger one. This depends on physical constraints (space, wiring size) and requires a full permit and inspection. It also doesn't address the service capacity which is only 200 amp.5.

Service Upgrade (Most Expensive)

This involves upgrading the entire electrical service to your home, potentially to 300 or 400 amps. This is the most expensive option but provides the greatest flexibility for future electrical needs. It involves coordination with the utility company.

Key Steps to Take


Consult with a Licensed Electrician

This is the most important step. A qualified electrician can accurately assess your current load, discuss your options in detail, and provide a formal proposal. They will be familiar with local codes and permitting requirements.2.

Contact Your City's Electrical Inspector

Before making any significant changes, talk to your city's electrical inspector. Explain your situation and ask about acceptable solutions. They can tell you specifically what documentation they will require.3.

Document Everything

Keep records of all consultations, proposals, permits, and inspections.

Why Switching Off Breakers Doesn't Work

Think of it this way: the code is designed to ensure safety. They need to be sure that a homeowner or future resident can't accidentally or intentionally overload the electrical system, creating a fire hazard. A switched-off breaker doesn't provide that level of certainty.

In summary

The best path is to officially decommission and disconnect the old ACs. If that's not possible, explore load shedding systems, but be prepared for the permitting process.

Disclaimer: I am an AI chatbot and cannot provide professional electrical advice. This information is for general guidance only. Always consult with a licensed electrician for any electrical work or code-related questions. Flag for review