Solar mini grids can provide high-quality uninterrupted electricity to nearly half a billion people in unpowered or underserved communities and be a least-cost solution to close the energy access gap by 2030. But to realize the full potential of solar mini grids, governments and industry must work together to systemically identify mini grid opportunities, continue to drive costs down, and overcome barriers to financing, says a new World Bank report.

The deployment of solar mini grids has seen an important acceleration, from around 50 per country per year in 2018 to more than 150 per country per year today, particularly in countries with the lowest rates of access to electricity. This is the result of falling costs of key components, the introduction of new digital solutions, a large and expanding cohort of highly capable mini grid developers, and growing economies of scale.

Solar mini grids have become the least-cost way to bring high-quality 24/7 electricity to towns and cities off the grid or experiencing regular power cuts. Powering 490 million people by 2030 will require the construction of more than 217,000 mini grids at a cumulative cost of $127 billion. At current pace, only 44,800 new mini grids serving 80 million people will be built by 2030 at a total investment cost of $37 billion.

Produced by the World Bank’s Energy Sector Management Assistance Program (ESMAP), the new book, Mini Grids for Half a Billion people: Market Outlook and Handbook for Decision Makers, identifies five market drivers to set the mini grid sector on a trajectory to achieve full market potential and universal electrification

1. Reducing the cost of electricity from solar hybrid mini grids to $0.20/kWh by 2030, which would put life-changing power in the hands of half a billion people for just $10 per month

2. Increasing the pace of deployment to 2,000 mini grids per country per year, by building portfolios of modern mini grids instead of one-off projects

3. Providing superior-quality service to customers and communities by providing reliable electricity for 3 million income-generating appliances and machines and 200,000 schools and clinics

4. Leveraging development partner funding and government investment to “crowd in” private-sector finance, raising $127 billion in cumulative investment from all sources for mini grids by 2030.

5. Establishing enabling mini grid business environments in key access-deficit countries through light-handed and adaptive regulations, supportive policies, and reductions in bureaucratic red tape.