系统容量：10千瓦;   每年发电11,000-12,000度

总费用：$42,000.

Federal Tax Credit:  30% ($12,600) (till 2015).

能源公司贷款：70% ($29,400) (利率 6.00%) (八年左右还清).

付款形式：ESRCs at prefixed rate of $400 per certificate (1000度电/每张) until the loan is paid off.  估计每年可得12张 ESRCs ~ $5,000.  贷款还清之后and before 10 years after installation, ESRCs have to be sold to 该能源公司at either $400 per certificate or at market price (whichever is lower).  After 10 years of installation, ESRCs can be sold at market price.  

所以我没花一分钱就安装了该系统。现在我家用电不花钱。

Note:  新泽西州ESRCs现价约为$120/每张，一年多前 >$600/每张。我估计ESRC要回到>$400/每张的可能性极小，所以锁定$400/每张是明智的。各州的ESRC价格不一，网上应该查得到。