Plug Power Inc. (NASDAQ:PLUG) is one of the best Robinhood penny stocks to invest in. It stands out owing to its edge in the clean energy space through the provision of hydrogen fuel cell systems. Similarly, on August 21, analysts at Roth/MKM reiterated their ‘Buy’ rating on the stock with a $3.50 price target. Roth/MKM Asserts Plug Power Inc. (PLUG) 'Buy' Rating on Booming Business The research firm remains optimistic about the stock’s prospects, impressed by positive production activity at the company’ ...