"Until recently, I had never heard of the Contractors State License Board, or CSLB. It’s a California agency that regulates the construction industry, with a goal of protecting public health and safety. Most of its 15 members are appointed by the governor.

Why am I telling you this? Because CSLB sent shock waves through the solar industry this summer when it ruled that rooftop solar companies would no longer be allowed to install batteries — an increasingly popular tool for keeping the lights on during blackouts — without getting a new license that might require them to overhaul their workforce. Solar industry leaders were apoplectic, saying the new requirement would be impossible to meet and would crash the market. They filed a lawsuit to block it.

The groups pushing the rule change framed it as a safety issue. By requiring solar companies to use certified electricians to handle battery installations, they’ve argued, state officials can limit the risk of lithium-ion battery fires, explosions and other hazards."