I added up the nameplates and it comes to more than my service. Is that the answer?+
No, and this is the single most common way people frighten themselves out of a plan that would have worked. A dwelling load calculation does not sum nameplates. It applies demand factors that reflect the fact that a house never runs everything at once, treats some categories as largest-of rather than additive, and counts continuous loads at a higher figure precisely because they run for long periods. The result is routinely far below the naive total. Plenty of plans that look impossible on the back of an envelope pass a real calculation comfortably.
So how does the code actually treat these three?+
Differently from each other, which is the interesting part. EV charging is a continuous load and is counted at a raised figure with no demand factor relief — it is the least forgiving of the three. Heating and cooling equipment gets largest-of treatment rather than being added to everything else, since you do not heat and cool simultaneously. A range is counted through its own demand provisions rather than at nameplate. The upshot is that the charger usually dominates and the range usually costs less than people expect.
Which of the three is most likely to be the problem?+
The EV charger, most of the time, because of how continuous loads are counted and because chargers are often specified larger than the household actually needs. The heat pump comes second and depends heavily on the equipment selected. Induction is frequently the least demanding of the three in calculation terms, which surprises people who assume a big range is a big load.
Can I reduce what the charger contributes?+
Yes, and this is usually the cheapest lever available. A lower-amperage charger is often entirely adequate — most people drive far less than they plan for, and an overnight charge at a modest rate covers a normal week comfortably. Load management is the other route: a device that prevents the charger drawing while another large load runs, which lets the calculation treat the pair differently. Between them these two levers rescue a great many plans that would otherwise need a service upgrade.
What is energy management and does the code recognise it?+
It is a system that limits the total draw by controlling loads, and yes — the code recognises energy management in the load calculation, which is exactly why it works as a strategy rather than as a workaround. That recognition is what allows a plan to be assessed on what can actually draw simultaneously rather than on what is connected. It is also the mechanism behind smart panels, though a dedicated load-management device usually achieves the same thing for considerably less.
Does keeping gas for one appliance help?+
It can, and it is worth considering on its merits rather than treating full electrification as all-or-nothing. Retaining gas for one appliance — often the range, since induction is a preference more than a necessity for many households — sometimes brings the rest of the plan within an existing service. Whether that trade is worth making is yours to weigh, but it should be a decision rather than something nobody mentioned.
Do the 120V appliance options change the picture?+
Meaningfully, for water heating in particular, where 120V heat-pump models run on an ordinary circuit rather than a dedicated 240V one. Where the water heater is part of the same plan, choosing that route can be the difference between fitting and not fitting. It is worth pricing complete jobs — appliance plus electrical — rather than comparing appliance prices, because the electrical difference is often the larger number.
What if the calculation says no?+
Then you have a real answer and several options: a smaller charger, load management, staging the additions over time, retaining gas for one appliance, or upgrading the service. Listed cheapest first, which is not the same as best first. The first four all work by accepting a limit — a slower charger, appliances taking turns, or keeping a gas appliance you meant to replace — and most people going all-electric do not want to choose between the oven and the car. Upgrading the service is the most expensive and the only one that removes the constraint rather than managing it, and if you intend to add everything eventually it is usually the right call rather than the fallback. What matters is that the choice is made against a calculation rather than a guess, and with a clear picture of what each option feels like to live with.
Is it cheaper to upgrade the service once and stop worrying?+
Often, yes — if you are genuinely going to add all three. The incremental cost of sizing generously at the time of a rebuild is much smaller than the cost of a second rebuild later, and the levers above all carry some ongoing compromise. Where people go wrong is upgrading reflexively without the calculation, and discovering afterwards that the existing service would have carried the plan with a smaller charger.
Who installs what?+
We do the panel, the service and every circuit. A C-20 contractor sets the heat pump equipment itself; we do its panel and circuit side. Water-heater plumbing and gas lines belong to a C-36. The range is ours on the electrical side once the circuit is there. Knowing where the boundaries fall matters mostly for scheduling, which is usually what sets the calendar on a multi-appliance project.
Should I get all three quoted together?+
The electrical, yes — emphatically. Running one calculation against all three, and pricing the circuits as one job, is both cheaper and more accurate than three separate conversations. The appliances themselves can be bought whenever suits, but the electrical decision should be made once, against the full list.
Does financing apply?+
All three of these are qualifying energy-efficiency upgrades for GoGreen Home financing, so panel work tied to them normally qualifies where the same work on its own would not. It attaches to the qualifying work rather than to the plan as a whole, so it is worth confirming per phase rather than assuming once at the start.
Do I need a permit?+
Which authority issues one depends on your address rather than on the appliances: the City of Santa Cruz, Capitola, Scotts Valley and Watsonville each run their own, and everything unincorporated goes through County Planning. Live Oak, Pleasure Point, Soquel, Aptos and Felton are all unincorporated county despite the mailing address. Where a permit applies to work we do, we pull it and coordinate the inspection.