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Massimo 500W 12V Portable Lithium Battery Power Station - $340
$340.00
Massimo 500W 12V Portable Lithium Battery Power Station at Costco for $339.99 12/28 through 01/01. Review notes it is 540wh.
https://www.costco.com/massimo-50...91481.html
https://www.costco.com/massimo-50...91481.html
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Here's a short youtube review where the guy basically trashes an identical Aimtom unit since it doesn't have regulated 12v circuit. https://www.youtube.com/watch?v=EAvMnN6
Too bad Hobotech hasn't reviewed any version of it yet, I find his reviews the most robust since he tests these battery power stations to the point of failure, the generics have weaker circuitry that get fried if you overpower it with a high power appliance (heat gun, heater).
I chatted with Costco and the return policy on this is only 90 days.
Here's a review on ebay I found helpful:
This is the one! I
I Purchased this unit after two weeks of reading reviews from just about all the compatible units in this class and I'm really impressed with it. To start this exact unit is available in at least six different company brands with different color scheme to throw off the inexperienced consumer, at a higher price ($70-90 more). They all have pretty much the same reviews and I have asked the same technical questions to all of the different brands with obviously the same answers. (Because it's the same unit!) I finally purchased this unit for the best price I found of $387. This unit will charge fast within 6-10 hrs on solar on a sunny day depending on wether you have it hooked up to 100w or 200w panel. It will also charge in about 5 hrs with the wall AC jack or the 12v car adapter in about 8 hrs. The info on the screen is pretty accurate and tells you how much power your consuming and how much time you can run it at you current consumption rate. My favorite option is that you can run and charge things off of it while it's charging with the (pass through feature) The only drawback is that the 12v jack is not regulated and voltage will drop as the battery drains if it's not being charged simultaneously. All in all the best 500w @ 540wh unit you can buy for under $400 hands down. If your on the fence do yourself a favor and get it! You won't regret it.