Question 1

Does this have a blocking diode?

Accepted Answer

It is listed in product description has having a blocking diode.

Question 2

how long will it take with good sunlight to recharge a dead 12v automotive battery?

Accepted Answer

This highly depends on your definition of "dead" as well as "good sunlight".  However, I'll give you an example of my experience with a 10w solar charger on a very low battery in the south.  I maintain a church truck that gets started only on Sunday and it doesn't drive long enough for the alternator to do anything, plus I don't think the alternator even works so every start drains the battery quite a bit.  Within about 2-3 months the battery can go from fully charged to not able to start the truck before I installed a solar panel.  Once Covid hit I charged the battery for the final time with a battery charger to get it brought up high enough to start the truck again, but it was still starting very slowly because I couldn't leave it on overnight.  I bought a 10w solar panel and attached magnets on the back then stuck it to the hood and plugged it straight into the battery.  Now it starts with full battery voltage every Sunday, and even recharges the battery from the starter drain and no alternator recharging.  It gets about 10 hours of sunlight every day and it's sitting flat on the hood which gets the best use of the noon sun which I think is the strongest.  Sorry for the super long answer, but with solar there are no real constants and everything is very subjective to your location and even the angle of the panel.

Question 3

Are there any directions with this item? also, do i peel off the plastic coating? it is all bubbly like i should, but i am not sure.

Accepted Answer

Yes, peel of the thin plastic. If you need instructions there are 2 different PDF files available in the product information section of this item.

Question 4

“Will this charge two deep cycle battles at the same time?

Accepted Answer

10 watts at 12v DC is only .83 amps at peak most deep cycles are 80-120 amp hour battery’s so your talking 200-300 hours of peak

ASIN	B015ZGDYII
Amperage	0.3 Amps
Best Sellers Rank	#278,357 in Garden & Outdoors ( See Top 100 in Garden & Outdoors ) #115 in Solar Battery Chargers
Brand Name	ECO-WORTHY
Colour	Black
Compatible Devices	12v battery
Connector Type Used on Cable	Alligator Clips
Country of Origin	USA
Current Rating	0.3 Amps
Customer Reviews	4.2 4.2 out of 5 stars (3,496)
Input Voltage	5 Volts
Item Dimensions D x W x H	200D x 12W x 200H Millimeters
Item Type Name	5W
Item Weight Unit of Measure	430 Grams
Manufacturer	ECO-WORTHY
Manufacturer Part Number	AM-L02EP5BB18V-1A
Model Number	DZ-STC-5
Number of Items	1
Output Voltage	12 Volts
UPC	788256345242

ECO-WORTHY 12 Volts 5 Watts Portable Power Solar Panel Battery Charger Backup for Car Boat Batteries

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