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Solar Energy Systems, net (Tables)
3 Months Ended
Mar. 31, 2018
Solar Energy Systems Disclosure [Abstract]  
Solar energy systems, net
Solar energy systems, net consists of the following (in thousands):
 
 
March 31, 2018
 
December 31, 2017
Solar energy system equipment costs
 
$
3,293,697

 
$
3,124,407

Inverters
 
333,822

 
317,390

Total solar energy systems
 
3,627,519

 
3,441,797

Less: accumulated depreciation and amortization
 
(430,780
)
 
(399,280
)
Add: construction-in-progress
 
89,065

 
119,053

Total solar energy systems, net
 
$
3,285,804

 
$
3,161,570