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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Disaggregation of Net Sales

Disaggregation of Net Sales

 

The following table shows the Company’s disaggregated net sales by product type:

 

    Years End December 31,  
    2018     2017  
DC power systems   $ 22,528,268     $ 13,798,841  
Accessories     1,518,086       619,885  
Total net sales   $ 24,046,354     $ 14,418,726  

 

The following table shows the Company’s disaggregated net sales by customer type:

 

    Years End December 31,  
    2018     2017  
Telecom   $ 21,552,950     $ 12,714,164  
Government/Military     1,477,121       1,244,267  
Marine     177,909       278,254  
Other (backup DC power to various industries)     838,374       182,041  
Total net sales   $ 24,046,354     $ 14,418,726  
Schedule of components of inventory

As of December 31, 2018 and 2017, the components of inventories were as follows:

 

    Years End December 31,  
    2018     2017  
Raw materials   $ 6,060,448     $ 2,716,392  
Finished goods     2,741,321       3,100,661  
      8,801,769       5,817,053  
Less:  Inventory reserve     (330,000 )     (330,000 )
Total Inventories, net   $ 8,471,769     $ 5,487,053  
Schedule of reconciliation of the product warranty liability

The following is a tabular reconciliation of the product warranty liability, excluding the deferred revenue related to the Company’s warranty coverage:

 

    Years End December 31,  
Changes in estimates for warranties   2018     2017  
Balance at beginning of the period   $ 175,000     $ 175,000  
Payments     (244,454 )     (364,163 )
Provision for warranties     244,454       364,163  
                 
Balance at end of the period   $ 175,000     $ 175,000  
Schedule of estimated life

. Estimated useful lives of the principal classes of assets are as follows:

 

    Estimated life
Production tooling, jigs, fixtures   3-5 years
Shop equipment and machinery   5 years
Vehicles   3-5 years
Leasehold improvements   Shorter of the lease term or estimated useful life
Office equipment   5 years
Software   5 years
Schedule of anti-dilutive

The following potentially dilutive shares were excluded from the shares used to calculate diluted earnings per share as their inclusion would be anti-dilutive:

 

    December 31,  
    2018     2017  
Options     360,000       30,000  
Warrants     115,000       115,000  
Total     475,000       145,000