8 of 8 people found the following review helpful
Solar Trickle Charger,
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This review is from: PowerFilm R-14 14W Rollable Solar Panel Charger (Lawn & Patio)
I have installed large, glass, metal-framed solar chargers on a previous boat, but wanted something light, flexible, and removable for the tender to a large motor yacht. This unit seems to work well and provides 0.3 to 0.5 amps of charging current under typical conditions in San Diego in the winter, which is enough to keep the battery charged when the only draw is occasional running of the bilge pump when it rains.
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Showing 1-2 of 2 posts in this discussion
Initial post: May 4, 2014 6:34:04 AM PDT
Christoph Geiss says:
Interesting: 0.3 to 0.5 A at 15V would suggest a total output of approximately 7W or less, not 14W as stated. San Diego doesn't seem all that cloudy to me.
In reply to an earlier post on May 4, 2014 7:21:36 AM PDT
John P. Penhune says:
Haze and significant winter angle between the normal to the film and the sun angle account for most of the difference. Starting with ~ 1kW per square meter normal to the sun in free space there are a lot of factors that make typical solar panel installations achieve much less than best-case manufacturer claims.
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