For the three months ended June 30, 2021, we estimate that our revenue will range from $58.8 million to $60.3 million, an increase of $16.1 million or 37%, using the mid-point of the estimated revenue range when compared with revenue of $43.4 million for the three months ended June 30, 2020. The increase in revenue was due to increased demand for Solar EBOS generally and our combine-as-you-go system solutions specifically.
For the three months ended June 30, 2021, we estimate that our gross profit will range from $25.5 million to $26.5 million, an increase of $9.2 million, or 54%, using the mid-point of the estimated gross profit range when compared with gross profit of $16.8 million for the three months ended June 30, 2020. Gross margin during the three months ended June 30, 2021 benefited from a very high proportion of systems solutions revenue which may not repeat in subsequent quarters of 2021.
For the three months ended June 30, 2021, we estimate that our net income will range from $8.0 million to $10.0 million, an increase of $3.8 million or 72%, using the mid-point of the estimated net income range when compared with net income of $5.2 million for the three months ended June 30, 2020. The increase in net income was primarily due to increased revenue offset by an increase in interest expense.
For the three months ended June 30, 2021, we estimate that our Adjusted Net Income will range from $14.2 million to $15.1 million, an increase of $1.6 million or 12%, using the mid-point of the estimated range when compared with Adjusted Net Income of $13.1 million for the three months ended June 30, 2020. The change in Adjusted Net Income was related to the tax impact in 2021 related to the reorganization of the Company.
For the three months ended June 30, 2021, we estimate that our Adjusted EBITDA will range from $19.9 million to $21.0 million, an increase of $5.0 million or 33%, using the midpoint of the estimated range when compared with our Adjusted EBITDA of $15.4 million for the three months ended June 30, 2020. The increase in Adjusted EBITDA was related to our increase in net income.
As of June 30, 2021, we estimate cash and cash equivalents to be approximately $13.2 million and outstanding borrowings under our Senior Secured Credit Agreement of approximately $247.3 million, including approximately $198.3 million under our term loan facility and approximately $49.0 million under our revolving credit facility.
Reconciliation of Net Income to Adjusted Net Income and Adjusted EBITDA
Adjusted Net Income and Adjusted EBITDA are non-GAAP financial measures. We define Adjusted Net Income for the three months ended June 30, 2020 and 2021 as net income (loss) plus (i) amortization of intangibles, (ii) amortization of deferred financing costs, (iii) Tax Receivable Agreement liability adjustment, (iv) equity-based compensation, (v) COVID-19 expenses, (vi) non-recurring and other expenses and (vii) tax impact as discussed below in footnote (d). We define Adjusted EBITDA as Adjusted Net Income plus (i) interest expense less deferred financing costs, (ii) income taxes, (iii) depreciation expense and (iv) tax impact as discussed below in footnote (d).
Adjusted Net Income and Adjusted EBITDA are intended as supplemental measures of performance that are neither required by, nor presented in accordance with, generally accepted accounting principles in the U.S. (“GAAP”). We present Adjusted Net Income and Adjusted EBITDA because we believe they assist investors and analysts in comparing our performance across reporting periods on a consistent basis by excluding items that we do not believe are indicative of our core operating performance. In addition, we use Adjusted Net Income and Adjusted EBITDA: (i) as factors in evaluating management’s performance when determining incentive compensation; (ii) to evaluate the effectiveness of our business strategies; and (iii) because our Senior Secured Credit Agreement uses measures similar to Adjusted Net Income and Adjusted EBITDA to measure our compliance with certain covenants.