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Solar Energy Systems, net (Tables)
6 Months Ended
Jun. 30, 2018
Solar Energy Systems Disclosure [Abstract]  
Solar energy systems, net
Solar energy systems, net consists of the following (in thousands):
 
 
June 30, 2018
 
December 31, 2017
Solar energy system equipment costs
 
$
3,455,457

 
$
3,124,407

Inverters
 
353,422

 
317,390

Total solar energy systems
 
3,808,879

 
3,441,797

Less: accumulated depreciation and amortization
 
(463,983
)
 
(399,280
)
Add: construction-in-progress
 
92,926

 
119,053

Total solar energy systems, net
 
$
3,437,822

 
$
3,161,570