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考研
The installed price of solar energy has declined significantly in recent years as policy and market forces have driven more and
The installed price of solar energy has declined significantly in recent years as policy and market forces have driven more and
admin
2019-08-08
76
问题
The installed price of solar energy has declined significantly in recent years as policy and market forces have driven more and more solar installations.
【F1】
Now, the latest data show that the continued decrease in solar prices is unlikely to slow down anytime soon, with total installed prices dropping by 5 percent for rooftop residential systems, and 12 percent for larger utility-scale solar farms.
【F2】
With solar already achieving record-low prices, the cost decline observed last year indicates that the coming years will likely see utility-scale solar become cost competitive with conventional forms of electricity generation.
A full analysis of the ongoing decline in solar prices can be found in two separate Lawrence Berkeley National Laboratory Reports.
【F3】
Both reports also stress the fact that while the median price of solar has declined, there is still significant variability in the cost of both rooftop and utility-scale solar installations.
For example, among residential systems installed last year, the cheapest 20 percent of systems sold for less than $3.30 per Watt while the most expensive 20 percent sold for more than $5.00 per Watt. 【F4】
Likewise, the cheapest 20 percent of utility-scale systems sold for less than $1.60 per Watt while the most expensive 20 percent cost over $2.60 per Watt.
The point is that cheap solar in one location doesn’t necessarily mean cheap solar everywhere. The installed price still varies a lot.
Perhaps the most interesting piece of data to come out in the latest Lawrence Berkeley National Lab reports is the trend in the price of solar power purchase agreements or PPAs. These prices reflect the price paid for long-term contracts for the bulk purchase of solar electricity. The latest data show that the solar PPA price last year fell below $50 per megawatt-hour (or 5 cents per kilowatt-hour) in 4 of the 5 regions analyzed. 【F5】
In the power industry, the rule of thumb for the average market price of electricity is about $30 to $40 per megawatt-hour—so solar is all set to match the price of conventional power generation if prices continue to decline.
Going forward, the declining price of solar across all categories demonstrated by the latest Lawrence Berkeley National Laboratory reports coupled with the extension of the federal renewable energy investment tax credit through the next three years should drive a continued expansion of the U.S. solar market and even more favorable economics in the next few years.
【F5】
选项
答案
根据电力工业的经验法则,电力的平均市场价格大概是每兆瓦时30美元至40美元。因此,如果太阳能价格持续降低,它就随时可以与传统的发电电能价格相匹敌。
解析
①本句为并列复合句。主句为so连接的两个分句。分句1为主系表结构,分句2为主谓宾结构。②分句2中包含一个if引导的的条件状语从句说明solar is all set to match the price of conventional power generation发生的条件,该从句为主谓结构。
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0
考研英语一
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