Rally 7637 Marine Grade 500W Power Inverter with USB Charging Port and Map Light

• 500 watt continuous and 1000 watt peak
• Dual 120 volt AC power outlet and USB accessory charge port with cover
• Corrosion resistant circuit board with overload and thermal protection
• Built in Area/ Map Light
• LED status indicator for power and fault conditions

This is exactly the same thing you would buy if you got a Harbour Freight unit. They are manufactured at the same place. This unit is NOT marine grade, there is no epoxy coating on the board. Obviously with a fan it's not water tight either.

It's cheap plastic, no hiding that.

It can take a load and it performs well. You can water resist any inverter, just take off the plastic case and spray clear coat on the board. Then heat it to 200* for 2hrs to cure it (just run an inverter with a load for two hours).

EVERY modified sine wave inverter is most efficient when it's running HALF it's rated Nominal load. It's just the way the circuit and transistors work. This unit is 71% at half and less than 65 at full. That's GARBAGE! Cobra units are over 80% on both and Pure Sine are over 90% on both.

It's overpriced for what it is. Don't bother. I really was expecting something much better. I'm giving it three stars because the board, solder and parts used are good quality but it's a dated design that's not efficient. 10amps in gives you .5amps out (DC to AC) or in another way 120 watts consumed in DC power gives you 60 watts out. You loose half the power. It also falls really short in capacitance capabilities or in english starting an electric motor from a stop (press the trigger on a drill that's startup draw or Capacitance). The PEAK is usually where that rating comes in but a 1/2" hammer drill from Milwaukee blew out the safety shutdown every time and it's rated for 500w.

SOLAR users: Buy a more efficient model. You don't need to spring for Pure Sine unless you intend to run sensitive electronics (computernot laptop, LCD TV, cable box, anything with a radio in it, etc...).

Buy Rally 7637 Marine Grade 500W Power Inverter with USB Charging Port and Map Light Now

I got this item to go camping, and when I got it out of the box to use it it wouldnt work. I tried the other adapter and it came on for a sec but went right back off and never worked again. The only thing I was tryin to power was a heating pad for my disabled husband while we was camping, so I know the watts was plenty for that. HORRIBLE PRODUCT

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It claimed marine use, it is very light and has two ways to provide power. So far no complaints. I would buy another so far.

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Love the multitude of ports this inverter supplied. Even has a map light! Got it at a ridiculously low price with free shipping as well so this was one of my favorite purchases. Love the 500W of power it is capable of providing. Great product marine grade products are usually made above and beyond expectations! Would recommend even at the regular price.

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This is a great product. I had to keep my wound vac plugged in while traveling. This worked perfectly. We did find one a lot cheeper at Sam's.