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Sunsei 25006 SE-500 7.5-Watt 15-Volt Solar Panel Battery Charger / Maintainer

4.0 out of 5 stars 9 customer reviews

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  • 7.5-Watt (500mA, 15-Volt)solar charger, perfect for medium sized boats, R-Volts, trucks and tractors
  • Protects against natural battery discharge and electronic drain
  • Touch-action indicator
  • Engineered to maintain your 12-Volt deep cycle battery
  • Perfect for back-up power in RVs, boats or off-grid applications

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Technical Details


Product Description

Product Description

This solar-powered battery trickle charger from ICP® Solar Technologies is perfect for medium-sized boats, RVs, trucks and tractors. It's designed to protect against natural battery discharge and electronic drain, and it can also charge portable units such as deer feeders and gate openers.

From the Manufacturer

The SE-500 Sunsei solar 7.5-Watt 120-Volt charger is a solar panel designed to provide reliable, renewable energy as an alternative to noisy and expensive diesel, propane and gas generators. This solar panel is ideal for medium-sized boats, RVs, trucks and tractors and can also be used to charge portable electronics, deer feeders, gate openers and fence charges. It is engineered to maintain a 12-Volt deep-cycle battery, it will keep a battery topped off when not in use. The weatherproof solar charger provides immediate trickle-charge when exposed to daylight, even on cloudy days. Its "Plug-n-Play" features allows connection of multiple panels in seconds without tools or rewiring; it also features a touch-action indicator to show when the panel is charging. The panel comes with 1 -cigarette lighter adapter,1-female cigarette lighter adapter,1-battery clamp connector,1-terminal ring connector,1-extension cable (10-Feet),1-panel-to-panel jumper cable, 4-mounting screws. It is 14.8-Inch by 14.2-Inch by 1-Inch in size and weighs 3.3-Pound. It is covered by a 10-year warranty

Product Information

Product Dimensions 17.8 x 16 x 2 inches
Item Weight 3.3 pounds
Shipping Weight 4.5 pounds
Manufacturer Sunsei
ASIN B001KQ5XBO
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Item model number SE-500
Customer Reviews
4.0 out of 5 stars 9 customer reviews

4.0 out of 5 stars
Best Sellers Rank #576,807 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
#2,285 in Patio, Lawn & Garden > Generators & Portable Power > Solar & Wind Power > Solar Panels
#210,408 in Sports & Outdoors > Outdoor Recreation > Camping & Hiking

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By J. Preston on December 30, 2008
Verified Purchase
I purchased this for trickle charging the battery on my tractor. It tends to sit (covered) in a sunny spot, and, it is an electricity hog when I use the lights on it. It has worked well for about a month maintaining the charge on the battery, making up for the poor output of the old generator on the tractor, and boosting the starting and lighting power.

This unit provides a constance 0.5 amp charge. I have a few concerns. I hooked up a high quality voltmeter to it and the charge read somewhere between 16 volts and 18 volts (off the scale on my volt meter). Under a load (once connected to the battery) it may read a lower voltage but I have not measured it under load.

In any event, it charges the battery over a period of about four days and keeps it charged.

A real plus to this unit is that it is accompanied by an excellent array of leads. It has an extension cord that is about 8 feet long. There are four types of leads enclosed with the package.

The first are bare wires (+ and - (red & black)) that, on the other end, plug into the unit or the extension cord.

The second are a set of alligator clips (+ and - (red & black)) that, on the other end, plug into the unit or the extension cord.

The third is a male cigar lighter adapter that plugs into the unit or the extension cord.

The fourt is a female cigar lighter adapter that plugs into the unit or the extension cord.

All of the connections and leads are of good to high quality.

With these attachments, you have the versatility you need to hook it up to any vehicle or 12v battery.

This is well worth the $100 (approximate cost plus shipping).
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In all fairness, I never expected to charge a dead battery with this. I leave my boat parked in the desert and I leave this plugged in. Week after week, I go back to the boat and it the battery is fully charged. I was worried that without a trickle charger that I would be "stuck" constantly looking for a jump or have to carry another jumper battery. With the SE-400, this has not been the case. I did buy the small charge controller (probably not needed) as well as the mounting equipment. The mounting arrangement was overpriced for what it was, but it works very well and is probably the simplest way to go. If you're handy, you could easily make your own. (This should be a separate review.) If you are looking for a trickle charger, I think this is an excellent solution.
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Verified Purchase
The product is very nice and works as advertised. Sunsei did a nice job for the most part. Only issue with its design is the caps that cover the 2 power jacks on it fall off easily and are easily lost.

Other than that, the only problem is upon receiving it, it had two large cracks across the glass. It still works, but is no longer weatherproof. You cannot see these until you open and remove the panel from its blister pack. Mine was shipped from Vermont to Chicago via UPS. Even though the box had "FRAGILE" printed on it, they didn't take good care shipping it. In the future I'll look for this sort of product in an outdoors recreation store in the area.
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Verified Purchase
I purchased this charger to help my tent trailer battery when we are camping without a hookup. It looks like it would be a great choice for the job, I like all the different cables and adapters that come with it.

However, like another reviewer noted, my panel arrived damaged. Not just a couple of cracks, but shattered. The box was marked fragile, but was not packed accordingly. No styrofoam peanuts, no plastic cushion bags, just some wadded up paper to take up the extra space in the shipping box. The shipping box didn't even look very beat up. I called customer service and was very pleased with their prompt replacement. However, the replacement unit arrived in the same shape. Shattered. I returned both of them and got my money refunded. I purchased a similar Sunsei unit at a local store and have been pleased with it.

Amazon, either you have a bunch of broken product on your shelves, or you need to change how you ship fragile items. Or both.
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i had just bought this panel at Bass Pro Shops and i took it out of the box and was satesfied at how such a small device can top off a deep cycle battery. i need this because i use a Deep cycle battery to run a minn kota 30lb thrust trolling motor.
i also like the fact that the charge is very sensitive even in a room with very little light, in other words dosent take no light as being a good answer, i highly recommend it for anyone that loves being outdoors
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