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  • Instapark PowerBox Mars100 Fold-n-Go Portable 100-Watt Solar-powered 12V Battery Charger with Built-in Charge Controller & Cooling Fan
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Instapark PowerBox Mars100 Fold-n-Go Portable 100-Watt Solar-powered 12V Battery Charger with Built-in Charge Controller & Cooling Fan

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Available from these sellers.
  • Powerful 100 watts high-efficiency mono-crystalline solar panel with foldable design, ideal for charging all 12-volt lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell)
  • Stylish, foldable & self-contained design with compact size and light weight, ideal for home use and outdoor activities
  • Built-in controller prevents battery from being over-charged or over-discharged and built-in cooler fan with temperature sensor prevents overheating.
  • Multi-functional 5-LED Charge / Battery Strength indicator
  • Adjustable steel flip stand for maximum sunlight exposure
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1 refurbished from $299.99
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Automotive Winter Driving Essentials

Product Information

Technical Details
Item Weight18 pounds
Product Dimensions26.2 x 2.8 x 26 inches
Item model numberSPB0104
Manufacturer Part NumberSPB0104
Folding Yes
Cover Included Comes with housing
Special Features power folding, extendable
Amperage10 A
Voltage18 volts
Wattage100 watts
Additional Information
Best Sellers Rank #222,513 in Automotive (See top 100)
Shipping Weight22.8 pounds
Date First AvailableApril 20, 2012
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Product Description

Converting virtually unlimited supply of solar power to much needed juice for your 12V batteries, the Instapark SPB0104 is a powerful 100 watts, yet compact solar powered battery charger, an indispensable tool for your automobiles, RVs, marine boats and etc. To ensure safety and durability, the SPB0104 is built-in with a 10 amp charge controller which prevents the battery from overcharging and excessive discharging, also there is a cooling fan controlled by a temperature sensor to prevent overheating.

Folded up nicely and neatly into a carrying case with handle, this elegant and stylish design not only offers great protection for the solar panels but also excellent portability and easy storage while the solar panel is not in use.

Key design features include:

Whole System Integration - The solar panel, charge controller, cooling fan & storage compartment for accessories are all packed in one unit, designed for easy storage, portability and daily use.
Low Maintenance - No regular maintenance is required.
Durability - Built with strong ABS plastic body and steel back stand.
Simplicity - Easy operation, the system is plug-and-charge, no training or experience required.


Solar panel power: 100 Watts, 18 V / 5.55 A
Output voltage: 12 V
Output connection: Anderson
Controller: 12 V / 10 A
Disconnection voltage: 16 V (high) / 11.1 V (low)
Maximum charging voltage: 15.5 V
Maximum charging current: 10 A
Self-consumption: < 6 mA
Boost charging voltage: 14.4 V
Float charging voltage: 13.8 V
Dimensions: 26 ¼ X 26 X 2 ¾ inches
Net weight: 17 lbs 9 Oz

Accessories included:

15-foot connection cable, Anderson to Anderson
Extension cord, Anderson to alligator clips
Extension cord, Anderson to cigarette lighter male plug
Back stand belt
User manual

Customer Reviews

To start the user manual is written in very poor broken English.
Eric O Starnes
It works fine but the storage of the cables and accessory's in the panels in the back of the unit is just a little too small and make it hard to close the panel doors.
The instapak portable solar panel was easy to use, just plugged in and started charging.
Amazon Customer

Most Helpful Customer Reviews

27 of 27 people found the following review helpful By IDN on March 26, 2013
Verified Purchase
After two days testing in maybe a 2/3 sunny day, both days I am very impressed! I got this panel thinking it probably won't work, but can be returned. The purpose is to be able to solar charge my Stanley Power Stations and Automotive Jump Starters, which I use for light (13 watt CF bulb throws off = 60 watts light, can last up to two nights in a power out) USB ports, powering a wireless modem, using a DVD player and charging phones, ipods, laptops and such in a power outage. We were out 10 days during Sandy in NJ, and luckily I had a place to bring the Stanleys that had power and could rotate them. Problem was, I ate up lots of gas running back and forth and there was a big problem getting gas. Would be better to charge them up right at home.

Day one, I took a small 300 Amp Stanley and drained it halfway down. It charged to full capacity in about 1 1/2 hours. I was stunned. Can't be right. So I drained to about 50% one of the larger 450 Stanley Power Stations, and put it out today on a mostly sunny but sometimes cloudy day. In two hours that one was DONE! I can't believe how quickly these charge them, they are really great panels.

The construction... if there were a way to take a half star off the rating I would have. The casing is plastic. I'd have gladly paid a bit more for metal. I am very worried it may crack so I baby it. You have to move these around to track the sun, easy enough, but be careful. Other than that the design is brilliant, it is truly plug n' play. It folds up and stores easily. You could take this anywhere, on a camping trip it would be wonderful for example, but save the box for transport...again, I worry about the plastic housing. Sturdy enough, if you don't smack it or drop it though.

The so called manual...
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72 of 86 people found the following review helpful By Eric O Starnes on April 10, 2013
Verified Purchase
First of all, I am generally easy to please and in fact have written several reviews for Amazon on different products always awarding either four or five stars. With that said, this product is without a doubt the single most disappointing product I have every purchased.

To start the user manual is written in very poor broken English. There are at least 50 spelling/grammar mistakes in the small 10 page manual. This may seem petty and if this was the only problem I would have gladly accepted the product, however, it is telling of a company's quality control to manufacture in China and sell in The States without having reviewed translated material. What else was not reviewed? In this case, clearly the product itself. An intern could have reviewed this document in less than 15 minutes and corrected all of these mistakes.

Next, I have to say that the physical packaging is quite good and the design is clever, however, the solar panels were lightly scratched over the entire array. It was difficult to find a one-inch square that was unscratched. During my call with Instapark customer service, I asked if these were 2nd hand panels, but the CS person confirmed that they were Grade-A panels.

Most importantly, using a multimeter, the output was only 1.7V vs. the spec of 12v and the current was only 3.2A vs the spec of about 9A. I was so surprised at this result that I connected my multimeter to my car battery just to make sure that my multimeter wasn't faulty. During my call with customer service they explained that this was normal and that I should measure the voltage after I connect it to the battery. I told him this was nonsense because as that point it would be a measurement of the battery voltage and not that of the solar panel.
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13 of 13 people found the following review helpful By D. Leeper on March 17, 2013
Verified Purchase
I've only owned this product for one week, but I can say that it is nicely designed, it includes essential connectors, and it's easy to use. I like the way it folds flat and stores neatly out of the way on a wall hook in my garage. I was thinking of putting together a charging system out of component parts, but this unit looked so convenient, portable, and easy to store, that I went for it.

So far I've only charged up one battery. It was a deeply discharged 35 Amp-Hour AGM battery, and it took about one full day of bright sun (Phoenix, AZ) to bring it all the way back to full charge. The indicator lights on the panel clearly showed the charging progress from empty to full. Very nice. Unlike some other reviewers, I had no trouble seeing the indicator lights in bright sun. I just had to look at them "head-on" -- they are recessed a bit into the case, so they don't show up at an angle -- no big deal.

Out of curiosity, with external meters, I observed battery voltage and charging current during the charge-up. Voltage started at about 11.5 volts and ended at 12.5 volts. Initial charging current started at about 2 amps and climbed in a matter of a minute or two to over 3.5 amps. Charge current gradually declined to a low of about 1 amp at the end of the cycle. That's about 40 watts peak power going into the battery. The unit is rated at "100 watts" but I presume that's the maximum "raw power" the bare panels could produce on their own -- the embedded charging electronics are there to protect the battery and the charging unit, and they seemed to be doing their job. The unit does have overheat protection circuitry, which did not "trip" during the charge cycle.

The instructions are adequate, and the unit is so simple to use that not much instruction is needed.
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