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Schumacher SP-200 2.4W Solar Battery Maintainer

3.9 out of 5 stars 243 customer reviews
| 68 answered questions
List Price: $49.99
Price: $24.37 & FREE Shipping on orders over $49. Details
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  • It is environmentally safe
  • No electricity needed for operation
  • Amorphous technology allows charging on cloudy days
  • Rated for indoor and outdoor use
  • Complete with battery clamps and 12 Volt plug
› See more product details
10 new from $24.29
$24.37 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com.

Frequently Bought Together

  • Schumacher SP-200 2.4W Solar Battery Maintainer
  • +
  • Schumacher SPC-7A 12 Volt Solar Charge Controller
  • +
  • Schumacher EC-25 25' Cable Connector Extension Cord
Total price: $52.39
Buy the selected items together

Product Information

Technical Details

Brand Schumacher
Item Weight 2.4 pounds
Product Dimensions 123 x 10.4 x 1 inches
Origin China
Item model number SP-200
Manufacturer Part Number SP-200

Additional Information

ASIN B004ZC3TFC
Customer Reviews
3.9 out of 5 stars 243 customer reviews

3.9 out of 5 stars
Best Sellers Rank #4,402 in Automotive (See top 100)
#131 in Automotive > Replacement Parts > Batteries & Accessories
Shipping Weight 2.5 pounds (View shipping rates and policies)
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available May 5, 2011

Warranty & Support

Warranty, Parts:Parts
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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From the Manufacturer

SPC-7A SP-100 SP-200 SP-400 SP-1500 SP-5400
Type Solar Charge Controller for 12V Solar Panels and Batteries Foldable Solar Charger Solar Battery Maintainer Solar Charger / Maintainer Solar Charger / Maintainer Solar Panel Kit
Environmental Safe ✓ ✓ ✓ ✓ ✓ ✓
Watts Handles up to 100 Watts of Solar Power 10 2.4 4.8 15 54
USB Port ✓
Quick Connect 12V Accessory Plug ✓ ✓ ✓ ✓
12V Female Charging Cable ✓
Quick-Connect Battery Clip Cable Assembly ✓ ✓ ✓
Includes SPC-7A Charge Controller ✓ ✓

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Customer Reviews

Top Customer Reviews

5.0 out of 5 starsWorks as advertised
By Mark Smidky on April 12, 2012
Verified Purchase
The charger works as advertised. The only thing I found lacking was a status light indicating that current was flowing to the battery when plugged into the cigarette lighter. I had to use a multimeter to check contacts at outputs for voltage - 19.2 volts. It appears well made, price is reasonable, and shipping was speedy.
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3.0 out of 5 starsNo Charge Controller
By Steve Wayne on June 28, 2012
After much contemplation and research,,, and calling the manufacturer I've been informed (buy the manufacturer) that this unit does NOT have any method of charge control. Beware! ... you can easily overcharge your battery(s) with this unit. Overcharging can cause serious irreparable damage to your battery. Therefore, unless you're continually monitoring the charge state, and can disconnect this charger at the appropriate point, you need to use a charger that incorporates a charge controller. Don't use this unit as a "connect it and forget it" method of keeping your batteries charged or "topped off". You need something that has a charge controller. 73.

UPDATE: In response to other comments; yes, if you're charging (maintaining) large capacity batteries such as automotive or marine, a controller may be unnecessary. Caution due however with smaller batteries.
15 Comments 157 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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3.0 out of 5 starsSchumacher SP-200 solar maintainer
By E. Hill on June 27, 2013
The Schumacher Solar battery maintainer is a solar panel with a cigarette lighter type power plug and a set of battery clamps.

I measured the open circuit voltage at noon near the Summer solstice at 21.2 Volts.
The short circuit current at 191 milliamps and when connected to a charged automotive battery the current was 165 milliamps. The current will vary with the battery voltage so for a charged battery at 12.6 volts the current should be about 190 milliamps to get 2.4 watts. This panel did not put out the full rated 2.4 watts but probably close enough.

The output of a solar panel is unregulated and the voltage will drop down when connected to a load such as the battery so the high open circuit voltage is not a problem. The voltage needs to be higher than the battery to charge it. This high voltage would only be a problem if the panel put out much more current than this one or if you wanted to run a 12 volt device directly in which case you would need a voltage regulator. (Of course this device is meant to be plugged into a car battery). This panel does not put out enough to over charge a car battery even if it did put out the full 2.4 watts all the time, after all your alternator puts out over a 1000 watts to charge a battery and the regulator will drop it down to a level probably higher than the 2.4 watts when charged.

This is advertized as a maintainer because it does not put out enough current to charge a battery in a reasonable amount of time. Most modern cars will draw a small amount of current from the battery even when switched off running things like the remote door lock receiver or keeping the radio presets and clock running and maybe an alarm system. This is fine when the vehicle is used fairly often.Read more ›
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5.0 out of 5 starsPerfect for what I needed it for
By T. Throop on July 13, 2012
Verified Purchase
Have a truck I don't drive every day but alarm drains steady power and after 4 days dead. Not only does that kill a standard car battery but makes it inconvenient to get the truck started. So after my research, went with this solar maintainer because its very simple and well made. No need to worry about overcharging a car battery since its so low of wattage. The one downside or warning is don't start the vehicle with this still plugged in because it suppossedly will backfeed from the alternator and fry the unit. I wish there was a way where I just hardwire this in and not worry about it truly, still researching if a controller will prevent that. By the way mounted on my dash with some doubleback tape.
2 Comments 25 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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5.0 out of 5 starsGreat maintainer!
By Stump Jumper 42 on May 5, 2012
Verified Purchase
I use this one on the battery in my RV in the Mountains. I have used for two trip so far and the battery is alway fully charged when I get to the camper and open up slide out. Great product with no out of pocket expense once you have purchased.
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5.0 out of 5 starsThis Little charger works!!
By LonMan on March 4, 2014
Verified Purchase
I bought this charger about 3yrs ago. I didn't really use it much. It was plugged in to keep my truck batterie charged but I couldn't really tell if it was working since I never really had a batterie discharge problem to begin with. But when my dad needed to keep a car batterie charged to run an electric fence last month I could see that it really does the job. We had a spot in the fence that was difficult to keep the cows in so dad ran a wire through it. It was to far to run power to so we tried a car batterie with this charger attached and it worked like a charm.
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5.0 out of 5 starsCould Not Be More Pleased...
By AgentSmith on August 18, 2012
As an avid biker, I don't actually drive my vehicle that often - but when I do, it is important to me, that I am able to jump in and go - and not have to deal with a dead battery. This little solar panel is just perfect - and it works! Since my purchase, my battery has been perfectly charged - no muss - no fuss.
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4.0 out of 5 starsFor Company Car
By Maria on March 24, 2014
Verified Purchase
Our company car doesn't get used a lot, so the battery is constantly dying. We used the solar battery charger and have never had any more trouble.
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Most Recent Customer Reviews

4.0 out of 5 starsFour Stars

left charging for 3 months while away, battery not dead, but not charged enough to start engine

Published 7 days ago by Richard
5.0 out of 5 starsGood charge

Works pretty good for charging the back hoe,, just leave it on the front end-- only need to wipe the dust occasionally.

Published 9 days ago by Laz
5.0 out of 5 starsWorks as Advertised

I attached this Schumacher SP-200 2.4W Solar Battery Maintainer to a 2007 Chevy Silverado that is seldom driven, I used the Schumacher SPC-7A 12 Volt Solar Charge Controller to... Read more

Published 11 days ago by V. O. Ritter
5.0 out of 5 starsPerfect for the camper batter

Perfect for the camper battery/

Published 15 days ago by Lawrence Carlucci
3.0 out of 5 starsAs advertised, so far

Appears to be working as advertised, but controller added didn't work but 2 days, so not sure that is putting out as much current as stated yet. Will update when get new results.

Published 17 days ago by ron west
5.0 out of 5 starsFive Stars

NICE PRODUCT'

Published 19 days ago by BOB PULFORD
3.0 out of 5 starsIt didn't work via plugging into the cig lighter plug ...

It didn't work via plugging into the cig lighter plug, and after an 8 week trip, upon returning I had to call road service! Read more

Published 21 days ago by Thomas Beck
1.0 out of 5 starsI bought two of these units, and one of ...

I bought two of these units, and one of them didnt last a year. The solar pannel inploited the other one is OK, both on brand new batteries

Published 1 month ago by Jose V.
3.0 out of 5 starsThis maintainer seems to be working properly,

This maintainer seems to be working properly, but had to unhook the battery to build up the charge because it didn't seem to catch upto the load to charge the battery and use... Read more

Published 1 month ago by Tim P.
4.0 out of 5 starsFour Stars

Worked as advertised

Published 1 month ago by Thomas Garry

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