Solar stocks are making big moves on news of the renewable-energy investment tax credit likely being extended. Here are four to watch.

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SEDG

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SolarEdge Technologies (SEDG) - Get Report

SolarEdge Technologies broke above its trend line and moving averages on Tuesday, and on Wednesday it popped another $3.76, or 17%, to $25.75, on 3.9 million shares. That's big volume for this stock, and it closed right near resistance. The next target is around $29, and if it can continue its momentum, it could run up to the mid-$30's eventually.

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SCTY

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SolarCity Corporation (SCTY)

SolarCity Corporation was a monster on Wednesday, up $13.64, or 34%, to $53.69, and traded nearly 18 million shares. That's the biggest volume on an up-day since I've been watching it. The stock tested its major declinng tops line going way back. However, because of the thrust being so strong from $24 to $54-55 in just about 5 weeks, I would expect some pullback/consolidation. But I think that's a set-up for more upside to $60 eventually.

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SUNE

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SunEdison (SUNE)

SunEdison took out its declining tops line and 50-day moving average on Wednesday, rallying 1.26, or 25%, to 6.21 on a whopping 109 million shares. Watch for the stock to reach last month's plateau in the $7.75-8 range.

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TERP

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TerraForm Power (TERP) - Get Report

TerraForm Powerhas had a tremendous recovery, nearly doubling in just the last 2-3 weeks. On Wednesday it gained 81 cents to $13.20, closing near resistance at the declining tops line and declining 50-day moving average, as well as at lateral price resistance. It could get a continuation into the $14 area, but it looks extended and may want to pullback and consolidate before its next move.

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This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.