
The Independent Advisor star ratings for solar panels is calculated based on weighted factors: durability and reliability (35 per cent), performance (35 per cent), and customer satisfaction (30 per cent). The customer satisfaction scores are derived from a recent survey of over 1,500 Independent readers who own solar.

国家可再生能源实验室(英語:National Renewable Energy Laboratory简称NREL),位于美国,是专门从事和的研究和开发的机构。 NREL是政府所有的、由承包商经营设施,并由提供资金支持。在这样的安排下,个人实体代表联邦政府经营整个实验室。 NREL也会收到国会的资金,以用于研究和进一步开发的项目。 NREL还国. . The National Renewable Energy Laboratory (NREL) in the US specializes in the of , , energy systems integration, and sustainable transportation. NREL is a sponsored by the and operated by the Alliance for Sustainable Energy, a joint venture between