Electrical grid crisis in Honolulu

We had rolling blackouts on the island of 'Oahu last week.  The reason was that demand outstripped power production in light of the loss of some power generation units on the island (news link).  The irritating thing is---it was a bright and sunny day.  The electric company has a moratorium on private solar units being added to houses in some areas.  The public reason they give is that it makes the energy grid unstable; but of course it also means the electric company will loose money.  If they cannot supply enough electricity to meet demands (by burning fossil fuel that is shipped to the island I might add---the most expensive electricity in the country) how can any lawmaker in their right mind allow them to get away with blocking people from producing their own renewable power?