REVENUE RECOGNITION The Company recognizes revenue primarily from four different types of contracts:  Charging service revenue  company-owned charging stations - Revenue is recognized at the point when a particular charging session is completed.  Product sales  Revenue is recognized at the point where the customer obtains control of the goods and the Company satisfies its performance obligation, which generally is at the time it ships the product to the customer.  Network fees and other  Represents a stand-ready obligation whereby the Company is obligated to perform over a period of time and, as a result, revenue is recognized on a straight-line basis over the contract term. Network fees are billed annually.  Other  Primarily related to charging service revenue from non-company-owned charging stations. Revenue is recognized from non-company-owned charging stations at the point when a particular charging session is completed in accordance with a contractual relationship between the Company and the owner of the station. Other revenues is also comprised of sales related to alternative fuel credits. The following table summarizes revenue recognized under ASC 606 in the condensed consolidated statements of operations: For The Three Months Ended March 31, 2020 2019 Revenues - Recognized at a Point in Time: Charging service revenue - company-owned charging stations $ 319,624 $ 324,895 Product sales 777,423 103,204 Other 133,619 51,599 Total Revenues - Recognized at a Point in Time 1,230,666 479,698 Revenues - Recognized Over a Period of Time: Network and other fees 63,619 90,978 Total Revenues - Recognized Over a Period of Time 63,619 90,978 Total Revenue Under ASC 606 $ 1,294,285 $ 570,676 The timing of the Companys revenue recognition may differ from the timing of payment by its customers. A receivable is recorded when revenue is recognized prior to payment and the Company has an unconditional right to payment. Alternatively, when payment precedes the provision of the related goods or services, the Company records deferred revenue until the performance obligations are satisfied. As of March 31, 2020, the Company had $132,671 related to contract liabilities where performance obligations have not yet been satisfied, which has been included within deferred revenue on the condensed consolidated balance sheet as of March 31, 2020. The Company expects to satisfy its remaining performance obligations for network fees and warranty revenue and recognize the revenue within the next twelve months. During the three months ended March 31, 2020, the Company recognized $63,621 of revenues related to network fees and warranty contracts, which were included in deferred revenues as of December 31, 2019. During the three months ended March 31, 2020, there was no revenue recognized from performance obligations satisfied (or partially satisfied) in previous periods. Grants and rebates which are not within the scope of ASC 606, pertaining to revenues and periodic expenses are recognized as income when the related revenue and/or periodic expense are recorded. Grants and rebates related to EV charging stations and their installation are deferred and amortized in a manner consistent with the related depreciation expense of the related asset over their useful lives over the useful life of the charging station. During the three months ended March 31, 2020 and 2019, the Company recorded $4,579 and $6,714, respectively, related to grant and rebate revenue. At March 31, 2020 and December 31, 2019, there was $79,091 and $83,670, respectively, of deferred grant and rebate revenue to be amortized.