Question 1

How long does it take to charge a 12v rv/marine battery?

Accepted Answer

Thanks for your question!
The charging time of the solar panel is closely related to the sunlight intensity while you are charging and the power of the device to be charged. Due to the lack of your rv/marine battery information, we cannot give a specific time.
For example, in a sunny day without cloud in the summer, and the solar panels on the seaside or on the top of the mountain are unobstructed, the charging time of a 200wh battery is about 200wh/90W*1.2=2.7h under the direct sunlight of 10:00-15:00 (If the light intensity is not enough, the time will surely be extended).
*(The 90W used above is not 120W, because it needs to consider whether the battery itself has a maximum input limit, although the normal output of ELECAENTA 120W solar panel is 120W. If the device to be charged has a limit, the current will be automatically limited during charging in order to protect the device.)
*In the later stage of a battery charging cycle, trickle current charging is generally used, so the time will be slightly extended to about 1.2 times.

Question 2

Can this panel be run in series with other panels?   If so, is there a limit to the total voltage in the string?

Accepted Answer

I do not see any advantage to putting these panels 'in series'.....But I have run two very successfully in parallel, using a 'splitter' to run the two panels into a single output connector; have used this setup on a solar power station as well as a truck camper with solar & batteries.

Question 3

How much for parallel cable and where to get it?  You link it to a 5521 cable which you say won't work.

Accepted Answer

My solution for running my two Elecaenta 120W panels was to purchase an SAE type 'splitter' which joins the two panels (my choice: LIXINTIAN 10AWG, $19). You will also need two (2) 5521-to-SAE adapter cables (COMeap 2-pack worked for me, $13). I use the parallel panels to augment the solar panel on my truck camper. Running two (2) 20-foot SAE extension cords is not a problem either!

Question 4

What adapter would I need to go to a XT-60 input?

Accepted Answer

Hello, the DC output of our solar panel is DC5521, we have a DC5521 to MC4 cable included in the package, you can purchase a MC4 to XT60 cable. Connect the DC5521 to MC4 cable to the DC5521 cable first, then connect the MC4 to XT60 cable, so it can charge your device.

Maximum Voltage	18 Volts
Maximum Power	120 Watts
Connector Type	USB-A, USB QC3.0, TYPE-C
Amperage Capacity	6.6 Amps
Standby Power Shutoff	25% High Efficiency Conversion
Item Weight	9.15 Pounds
Folded Size	19152.17 inch
Item Dimensions L x W x H	19"L x 15"W x 2.17"H
Material Type	Monocrystalline Silicon, Rubber, Oxford, ETFE

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ELECAENTA 120W Portable Solar Panel for Power Station, Foldable Kickstand Monocrystalline Solar Charger with PD 45W USB C/DC/ QC 3.0 for Phones Tablets, IPX5 Waterproof for Outdoors Camping Off Grid

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