Almost every quote we write for an EV charger, a hot tub or a basement suite has the same awkward paragraph in it: before we can add the thing you asked for, we need to talk about your electrical service. It is rarely what anyone wants to hear, and it is not always true. Here is how we work out whether it is true for your house.
What the number on your panel actually means
The rating on your main breaker is not a measure of how much power your house uses. It is a ceiling on how much it could draw at once. Most Chilliwack homes never come anywhere near their ceiling, which is why a house can run for thirty years on a service that looks small on paper and never trip anything.
What changes that is not the total number of things plugged in. It is adding a load that runs continuously and at high draw: a car charging overnight, a hot tub holding temperature through February, a heat pump, a shop with a welder in it. Those are the loads that move a house from comfortably under its ceiling to occasionally over it.
The load calculation is the whole answer
There is a defined method for working this out, and it is not a guess or a rule of thumb. An electrician adds up everything the house is actually connected to: its size, its heating, its water heating, its range, and every dedicated circuit already installed. The standard allowances are applied to that total, and the result is compared against what your service can carry.
The output is a number, and that number is the honest answer to the question. It is also the thing to ask for. If a quote proposes a service upgrade without one, ask what the calculated load came to. Any electrician who has done the work can tell you in a sentence.
What we need from you to do it
- Roughly when the house was built, and whether it has been added to
- How the house is heated, and how the water is heated
- Whether the range, dryer and any hot tub are electric or gas
- The specification sheet for whatever you are adding
- A photograph of the panel with the door open
That is usually enough to give you a direction over the phone before anyone drives out.
When the answer is no upgrade
Plenty of houses have room. A newer build with gas heat and a gas range is often carrying far less than its ceiling, and a Level 2 charger fits underneath it with margin to spare. In that case the job is what you asked for and nothing more: a circuit, a run, and a morning's work.
There is also a middle path that gets skipped too often. Some loads can be managed rather than added: a charger that steps its own current down when the rest of the house is busy, or an energy management device that sheds one load while another runs. That is frequently cheaper than a service upgrade and it is the right answer more often than it gets offered.
When the answer is yes
Sometimes the calculation comes back over, and then the upgrade is not optional and not a sales tactic. Worth knowing before you get the quote: a service upgrade is not only a new panel. It is coordination with BC Hydro, usually a new mast and meter base, a permit, and an inspection. That is why the number is what it is, and why the timeline is measured in weeks rather than days.
The upside is that it is a once-per-house job. A service sized with headroom absorbs the next thing you add, and the one after that, without another conversation like this one.
What to do before you call anyone
Take a photograph of your panel with the door open, find the spec sheet for whatever you are adding, and note how your house is heated. Those three things are most of a load calculation, and they turn a vague quote into a specific one.
If you are weighing up a charger, a hot tub or a suite in Chilliwack or anywhere in the Fraser Valley, send us those and we will tell you where you stand before anyone books a truck.