First, I'd respond that solar is very reliable and very well suited for our northern climate. The challenge with solar is that it only produces when the sun shines—but very reliably so during those conditions.
What we need battery storage for is to extend the operating hours for renewables projects to produce stored energy when the sun doesn't shine, for example. There are different types of storage technologies that are vying to help solve the market issue that exists. Battery storage is one of them.
Batteries typically have a relatively short duration; they can store energy economically for two to four hours. There are other technologies that are not yet as mature that are trying to provide storage solutions for longer, for eight to 12 hours or possibly even longer.
However, I think it's really important to look at the energy system as a mix. There is a mix of solutions, a mix of power generation technologies that we require. There is no one solution that alone is going to meet all our needs, but certainly the combination of renewables—which are primarily solar and wind today—with battery storage is something that is looking very promising, assuming that the regulatory framework is in place to accommodate it.