Serving these various markets, we offer the following configurations of our DC power systems, with output power ranging from 5 kW to 50 kW:

? Base power systems. These stationary systems integrate a DC generator and

automated controls with remote monitoring, which are typically contained

within an environmentally regulated enclosure.

? Hybrid power systems. These systems incorporate lithium-ion batteries (or

other advanced battery chemistries) with our proprietary battery management

system into our standard DC power systems.

? DC solar hybrid power systems. These stationary systems incorporate

photovoltaic and other sources of renewable energy into our DC hybrid power

? Mobile power systems. These are very light weight and compact power systems

Our DC power systems are available in diesel, natural gas, LPG / propane and renewable fuel formats, with diesel, natural gas and propane gas being the predominant formats.

The COVID-19 pandemic has negatively impacted business and industries all over the world since March 2020. The pandemic continues to have a significant negative impact on our overall operations including revenues, productivity, gross margins and liquidity.

Our solar hybrid power systems, which integrate solar energy storage with natural gas/LPG (propane) powered generators, are ideal for off-grid (i.e., areas where wireless towers are not connected to an electrical grid) and bad-grid (i.e., areas where wireless towers are connected to an electrical grid that loses power more than eight hours) applications.

Critical Accounting Policies and Estimates

Impact of New Accounting Pronouncements

See "Note 1 - Organization and Summary of Significant Accounting Policies - Recent Accounting Pronouncements" of the Notes to our condensed financial statements.

Financial Performance Summary and Outlook

See "Risk Factors" commencing on page 24 of this Quarterly Report on Form 10-Q for additional considerations.

? The first two data columns in each table show the absolute results for each

? The columns entitled "Dollar Variance" and "Percentage Variance" shows the

change in results, both in dollars and percentages. These two columns show

favorable changes as a positive and unfavorable changes as negative. For

example, when our net revenues increase from one period to the next, that

change is shown as a positive number in both columns. Conversely, when

expenses increase from one period to the next, that change is shown as a

? The last two columns in each table show the results for each period as a

General and Administrative Expenses. General and administrative expenses increased by $46, or 5%, to $1,036 during the three months ended June 30, 2022, as compared to $990 during same period in 2021. The increase in general and administrative expenses during the three months ended June 30, 2022 was primarily due to an increase in general and administrative staff.

For the six months ended June 30, 2022 and June 30, 2021, net sales to international customers accounted for 1% and 12%, of total revenue, respectively.

Net Loss. For the six months ended June 30, 2022, we incurred net loss of $1,859, or $(0.15) per basic and diluted share, as compared to net loss of $2,769, or $(0.22) per basic and diluted share for the six months ended June 30, 2021.

The following table sets forth the significant sources and uses of cash for the six-month periods set forth below:

Net increase (decrease) in cash $ (2,445 ) $ 6,892

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