New Hampshire’s renewable industry will get a boost – though at a possible cost to ratepayers – if three bills passed last week by lawmakers are signed into law by Gov. Chris Sununu. Senate Bill 446 is perhaps the most far-reaching, increasing fivefold the size of projects that would qualify for net metering. That’s the current law that allows homeowners, small business and groups to get credit, and sometimes even cash, for generating their own electricity.SB 446 would extend the upper limit from 1 megawatt to 5 megawatts, allowing large businesses, municipalities and even small hydro generators to take advantage of it, paving the way for much larger renewable energy projects.Critics, including utilities and some business groups, claim that generators are paid too much for the power, and this amounts to a subsidy paid for by other ratepayers. Advocates say that renewable energy saves money on distribution and generation costs.