Another modality is that adopted in Cambodia, where a consolidated licence provided by the national regulator allows mini-grid operators to play a small distribution role in the event of central grid extension by the public utility. Households with SHSs may have little incentive to purchase electricity from a mini-grid, particularly where this also entails a connection charge, and this could potentially reduce prospective demand below the minimum efficient scale for investment to be viable. Planning and coordination are needed between mini-grid development and grid extension, to ensure appropriate prioritization of investments, to avoid deterring potential investors, and to allow mini-grids to be interconnected and/or integrated into an overall grid as appropriate at a later stage. In light of the pace of innovation in the energy market, this calls for a flexible approach that avoids locking in particular technological solutions that may be inappropriate to the country's needs in later years.