钻石城控股有限公司已在太阳能产业的第一笔投资，承诺投资KDC太阳能公司高达2亿2500万美元资金。KDC将在新泽西州开发商业太阳能项目。
在新泽西州，太阳能项目的再生，接收，以及出售实体都必须遵守国家可再生能源的相关要求。一般来说，可确保双方合约与固定价格，具有可再生能源信贷长期合同，银行为其提供项目融资的项目开发者获收入来源更为稳定。
通过股权融资扶持太阳能项目，钻石城控股所冒风险更大。没有保证金，该公司资产增长步履维艰，因此该公司的输电量也相对较少。
一些私人控股公司也已步入发太阳能行业，包括能源投资合作伙伴，该公司曾出售大规模的公共事业太阳能面板给First Solar Inc., 和Denham Capital Management。
Diamond Castle Holdings LLC has made its first investment in the solar industry, committing up to $225 million of equity in KDC Solar LLC, which will develop and own commercial solar projects in New Jersey.
In New Jersey, solar projects can receive renewable energy credits that are then sold to entities that must buy them to comply with state renewable power mandates. Generally, project developers secure both contracts with buyers of the power, and fixed-price long-term contracts for the renewable energy credits to show banks that provide project financing that the projects will receive a steady stream of income.
By financing projects entirely with equity, Diamond Castle is taking a greater risk than those that use leverage, and it also is going to develop fewer megawatts, as its capital won’t extend without leverage. In Ranger’s view, the firm won’t be leaving value on the table, either.
Several private equity firms have taken stakes and exited from solar developers, including Energy Capital Partners, which sold utility-scale solar developer Nextlight Renewable Power LLC to panel maker First Solar Inc., and Denham Capital Management, which sold Italy-based SunRay Renewable Energy to SunPower, another panel maker, this year.
