Related Party Transactions

12 Months Ended

Dec. 31, 2017

Note 21 – Related Party Transactions

Related party balances were comprised of the following (in thousands):

	2017		2016
Solar Bonds issued to related parties	$	100	$	265,100
Convertible senior notes due to related parties	$	3,000	$	13,000
Promissory notes due to related parties	$	100,000	$	—
Due to related parties (primarily accrued interest, included in accrued and other current liabilities)	$	2,509	$	5,136

The related party transactions were primarily issuances, maturities and exchanges of debt held by Space Exploration Technologies Corporation (“SpaceX”), our CEO, SolarCity’s former CEO, SolarCity’s former Chief Technology Officer and an entity affiliated with our CEO. SpaceX is considered a related party because our CEO is also the CEO, Chief Technology Officer, Chairman and a significant stockholder of SpaceX.

On March 21, 2017, $90.0 million in aggregate principal amount of 4.40% Solar Bonds held by SpaceX matured and were fully repaid by us. On June 10, 2017, $75.0 million in aggregate principal amount of 4.40% Solar Bonds held by SpaceX matured and were fully repaid by us.

On April 11, 2017, our CEO, SolarCity’s former CEO and SolarCity’s former Chief Technology Officer exchanged their $100.0 million (collectively) in aggregate principal amount of 6.50% Solar Bonds due in February 2018 for promissory notes in the same amounts and with substantially the same terms.

On April 18, 2017, our CEO converted all of his Zero-Coupon Convertible Senior Notes due in 2020, which had an aggregate principal amount of $10.0 million (see Note 14, Common Stock).