The solar industry has been on a hot streak in 2019 as estimates for installations go up and margins slowly begin to stabilize across the industry. On the front lines, companies like Sunrun (NASDAQ: RUN), which installs residential solar systems, are experiencing steady demand, which is what they need to keep money flowing through their finance business. 

Sunrun's stock is already up 52% so far this year, but investors should still be wondering if there's further upside for a solar company with the No. 1 market share in residential solar. Here's a look at why I think caution is the best path forward. 

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Source Fool.com