Can I install an EV charger on a 100 amp panel in New Brunswick or do I need to upgrade?
Can I install an EV charger on a 100 amp panel in New Brunswick or do I need to upgrade?
You may be able to install a Level 2 EV charger on a 100 amp panel, but it depends on your current electrical load — many older New Brunswick homes will need a panel upgrade first.
The math matters. A typical 40-amp Level 2 EV charger draws significant power. On a 100-amp panel, you're working with limited headroom. The Canadian Electrical Code requires that your total connected load doesn't exceed 80% of your panel's capacity (80 amps usable on a 100-amp panel). If you have electric baseboard heat, an electric stove, a dryer, and a hot water tank, you're likely already close to that limit.
Load calculation is required. A licensed electrician will perform a load calculation per CEC Section 8 to determine if your panel can handle the additional EV charger circuit. This calculation considers all existing loads and determines available capacity. In New Brunswick, where many homes rely on electric baseboard heating, 100-amp panels are frequently maxed out during winter months.
Options if your panel is too small:
- Panel upgrade to 200 amp: $2,500-$4,500 installed, plus TSANB permit. This is the most common solution and future-proofs your home
- Load management device: $300-$600 installed. These smart devices monitor your electrical usage and throttle the EV charger when other loads are high, allowing installation on smaller panels
- Lower amperage charger: A 24-amp or 30-amp charger instead of 40-amp uses less panel capacity, though charging takes longer
- Time-of-use charging: Program the charger to run overnight when baseboard heaters cycle less frequently
NB Power service upgrade: If you upgrade to 200 amps, NB Power may need to upgrade the service entrance cable from the transformer to your meter. This can add 2-4 weeks and potential additional costs if the existing service cable is undersized.
TSANB permit is required regardless of whether you upgrade. Get your electrician to pull the permit and schedule the inspection — typical wait times are 5-10 business days in urban areas.
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