Portable power stations -- think power banks but bigger, much bigger -- are all the rage now, and they're great for charging up anything from AC power at home or taking off-grid. But if you want a true off-grid experience, you need to add solar panels to the mix. This way, as long as you have access to the sun, you have free, unlimited power!

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Some of the best solar panels available for power stations are theseEcoFlow 110W panels . And right now you can pick these up for a jaw-dropping price.

EcoFlow 110W Portable Solar Panel, IP68 Water & Dustproof (save$130)

$169 at Amazon

I've tested dozens of solar panels for power stations over the past few years, and EcoFlow solar panels are some of the best available. 

First, these panels offer an industry-leading 23% conversion rate for solar energy, meaning that you get more bang for your buck and you get away with using a smaller solar panel. 

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Then there's the IP68 rating for water-resistance and dust-proofing. It's a pain having solar panels that you have to take inside when the weather takes a turn for the worse. I know, because I once spent two months in Scotland and I had to put my panels away every time it rained -- and it rained a lot! -- so having the ability to leave them outside is a real time saver.

The cherry on top with these panels is that the carry case doubles as a kickstand, allowing you to set up your panels such that you maximize the amount of sun hitting them by setting the angle just right. This means you can charge your solar power station even faster.

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