WARRANTY OBLIGATIONS

3 Months Ended

Mar. 31, 2021

Product Warranties Disclosures [Abstract]

The Company’s warranty activities were as follows:


	Three Months Ended March 31,
		2021		2020
		(In thousands)
Warranty obligations, beginning of period		$	45,913	$	37,098
Accruals for warranties issued during period		3,894		1,524
Changes in estimates		7,655		1,677
Settlements		(2,930)		(3,270)
Increase due to accretion expense		943		774
Other		(922)		(302)
Warranty obligations, end of period		54,553		37,501
Less: current portion		(14,303)		(9,678)
Noncurrent		$	40,250	$	27,823

Changes in Estimates

In the three months ended March 31, 2021 and 2020, the Company recorded a $6.3 million and $1.5 million, respectively, increase to warranty expense based on continuing analysis of field performance data and diagnostic root-cause failure analysis primarily relating to its prior generation products. The Company also recorded additional warranty expense of $1.3 million and $0.2 million in the three months ended March 31, 2021 and 2020, respectively, related to unit costs for prior generation microinverter replacement mainly driven by tariffs.