US beats China as best country for RE investments China drops to second due to its high investment barriers. Ernst&Young’s latest Renewable Energy Country Attractiveness Indices or RECAI ranks nations on how attractive they are for renewable energy investments. The US reclaimed the top spot in RECAI after losing out to China a few years ago. China dropped to second place because of high barriers to entry for external investors. India is back on track after the reintroduction of a scheme to encourage wind power.