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12. REVENUES | 3 Months Ended
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Mar. 31, 2018
Notes to Financial Statements |
REVENUES | For each of the identified periods, revenues can be categorized into the following:
|  | For the three months ended March 31 |
|  | 2018 |  |  | 2017 |
Product Sales |  | $ | 2,868,630 |  |  | $ | 367,089 |
Maintenance Fees |  |  | 5,448 |  |  |  | 3,600 |
Professional Services |  |  | 1,894 |  |  |  | – |
Total Revenues |  | $ | 2,875,972 |  |  | $ | 370,689 |
At March 31, 2018 and December 31, 2017, deferred revenue amounted to $55,649 and $77,514 respectively. At March 31, 2018, the Company has received an initial deposit to plan and manufacture two Solar Tree® units in addition to deposits for multi-year maintenance plans for previously sold products. As of March 31, 2018, deferred revenue associated with product deposits are $26,304 and the delivery of such products are expected within the following six months, while deferred maintenance fees amounted to $29,344 and pertain to services to be provided through the fourth quarter of 2021.

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