You can make your own for about $2k for a 1kW/hr system with 300W solar panels [1]. Definitely the way to go if you want something that just works without the fancy in-line wiring.
And you wonder how many fires are going to be started by pervasive backup generators.
I spent in Central America two years. Every middle class house in Guatemala or Honduras has a generator. Since these countries are the model for California establishment, CA residents should stock up on generators too.