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WARRANTY OBLIGATIONS | 3 Months Ended
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Mar. 31, 2021
Product Warranties Disclosures [Abstract] |
WARRANTY OBLIGATIONS | WARRANTY OBLIGATIONS 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.

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- Definition The entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -URI http://asc.fasb.org/topic&trid=2155896 + Details
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