Load calculation
A written load calculation of existing and planned appliances, so you know whether you need more capacity at all.
Adding a heat pump, EV charger or induction range in Danville? HAXX runs the load calculation and upgrades the panel when the numbers call for it.
Serving Montair, Greenbrook, Sycamore, El Cerro, Magee Ranch and the Hartz Avenue downtown and the rest of Danville. Share your address to confirm availability.

Most panel projects start with a heat pump, EV charger, induction range or remodel. HAXX begins with your real electrical load and only upgrades what the numbers require.
A written load calculation of existing and planned appliances, so you know whether you need more capacity at all.
Replacing outdated, full or recalled panels, including Zinsco and Federal Pacific.
Coordinating the utility, meter and service equipment when the home needs more power from the street.
Adding a subpanel for a garage, ADU or new circuits when the main panel is out of space.
Smart panels and circuit-sharing devices that can avoid a service upgrade in some homes.
HAXX handles the permit, the inspection and the PG&E work order.
Danville's first housing tracts date to the late 1940s, and much of town was built in the 1970s and 1980s. Those panels were sized for gas heat, not today's electric loads.
The Town's EV charger checklist asks for a load calculation under CEC Article 220. HAXX does the same for any big new load to see if the existing panel can carry it.
When the service must grow, HAXX coordinates the disconnect and reconnect with PG&E and handles the Town permit.
Detached garages, pool equipment and additions often call for a subpanel. Danville lists separate submittal requirements for subpanel work.
Rated 4.8 across 515+ reviews on Housecall Pro, Google and Facebook. Read more reviews.
“The technician from Haxx immediately pointed out multiple violations of the National Electrical Code and explained that the wiring was overheating and could potentially become a fire hazard. They offered to redo the installation the correct way, pulled the proper permit, and installed the EV charger safely and professionally. The city inspection passed without any issues.”
“Recently, my dishwasher stopped working, and they discovered it was actually an outlet issue. Not only did they diagnose it quickly, but they also fixed the outlet—saving me from calling an electrician. Reliable, professional, and skilled at handling both appliances and electrical issues.”
“I purchased a couple of ceiling fans and was reluctant due to how old my house was with old wiring so I wanted someone professional and trustworthy. They have been both!”
Existing equipment, home layout and what you want to improve.
Sizing, airflow, equipment placement and electrical needs.
Options, exclusions, permit requirements and any eligible incentives.
Confirm equipment, scheduling and handover details with HAXX.
A closer look at recent electrical work by HAXX.

On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projects
Main panel installation.

Main panel upgrade.

Main panel replacement.

Span smart panel installation.

Subpanel installation.

Subpanel and new circuits.

Zinsco subpanel replacement.

Basement subpanel and circuits.
Yes. Electrical work is permitted through the Town of Danville's online permit portal. HAXX prepares the submittal and meets the inspector.
A load calculation compares your existing service with the new equipment. Many homes can add a charger or heat pump without a full upgrade.
Not always. A load calculation shows whether your current service can carry the new appliances, sometimes with load management. HAXX recommends an upgrade only when the numbers require it.
The panel swap itself is usually one day. Permits and utility scheduling for service upgrades can add several weeks, so plan early.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.
