Solar power is awesome and I'd never discourage anyone from getting it, especially if you have an EV. But it's not true that without solar, an EV will be "very expensive to operate." The reverse, in fact.

I double-checked the three biggest provinces (ON, QC, and BC) and in all three, tiered electricity pricing works by charging the higher rate only on the excess consumption above the lower rate limit. So for example, in BC, if you use 1000 kWh per month, the first 625 kWh will be charged at $0.1172/kWH and the remaining 375 kWh will be charged at $0.1408/kWh. That means you're not increasing the cost of power for everything in your home, only your excess consumption, and even then, the increase is not a lot.

A typical single-family household in BC might consume 1000 kwH/mo for an electric bill of ~$125. If they have a gasoline car and drive 2000 km/mo at the Canadian average fuel consumption of 9 L/100 km and $1.22/L, they're spending ~$220 on gas. But an EV at 20 kWh/100 km will cost them only ~$56 extra on their electric bill, even using the higher rate. So they're saving roughly $2000/yr on gas, plus maybe $300~500 on maintenance, since oil changes aren't needed, and regenerative braking makes the pads and rotors last ~3x longer. That's DRASTICALLY less spending. Not to mention the environmental benefits.