As soon as i connect to a car battery the lights turn off. When i disconnect it from the battery the charging lights come on on the controller.???

Mind did the very same thing. It end up being the wires coming from the controller to the battery. I ran the black wire from the controller to the plus side of the batter and the red to the negative. The green light turned off and the red light stayed on. I know the battery isn't fully charged, so I think the problem maybe solved.

Is the controller waterproof &, therefore, can it be mounted exposed to the elements?

I can confirm that the controller is not waterproof. I have used it without incident for a year, then forgot and left it out in the rain. I can't revive it, even after cleaning the PCB with rubbing alcohol.

Can other brand solar panels (2 x 20w) be joined with this one prior to the charge controller with the proper SAE pigtail?

Yes, you can do that. The total power of solar panels should be within 100w.

Will this run and bank (recharge from night use) enough energy for my rv furnace and pump?

How much energy does your RV use in one night? The panel produces 20 Watts in strong sunlight, figure 5-6 hours of good sun in a day, that"s approx 100 watt hours of energy. if your RV uses more than that in one night, the answer is no. If it uses less than 100 watt hours, then the answer is yes

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SOLPERK 20W Solar Panel，12V Solar Panel Charger Kit+8A Controller， Suitable for Automotive, Motorcycle, Boat, ATV, Marine, RV, Trailer, Powersports, Snowmobile etc. Various 12V Batteries. (20W Solar

Product ID: 255525018

Details

Brand
SOLPERK
Efficiency
High
Included components
1 solar panel
Item weight
2 kg
Material
Glass

🔋8A smart charge controller

☀️21-30% conversion efficiency

🛠️360° adjustable mount

Description

☀️ Power your adventures sustainably — never get left in the dark again!

SMART BATTERY GUARDIAN - Integrated 8A charge controller prevents overcharging and battery drain, intelligently maintaining battery health for long-term reliability.
COMPLETE READY TO GO KIT - Includes solar panel, charge controller, mounting bracket, alligator clips, and screws — plus 24/7 lifetime support and 1-year warranty for peace of mind.
BUILT TO BRAVE THE ELEMENTS - Durable tempered glass and corrosion-resistant aluminum frame make it 100% waterproof and rustproof, withstanding extreme weather and lasting 25+ years.
MAXIMIZE YOUR POWER HARVEST - High-efficiency polycrystalline solar cells deliver up to 30% conversion, ensuring your 12V batteries stay charged even in compact form.
EFFORTLESS SETUP PERFECT SUN ALIGNMENT - 360-degree adjustable mounting bracket with pre-drilled holes and plug-and-play cables means installation is a breeze and solar capture is optimized.

The SOLPERK 10W Solar Panel Kit is a compact, high-efficiency solar charging solution designed for 12V batteries across automotive, marine, and powersports applications. Featuring a smart 8A charge controller, durable weatherproof construction, and a 360° adjustable mount, it ensures reliable, maintenance-free battery charging and long-lasting performance for over 25 years.

Specifications

ASIN	B07TTMF3FZ
ASIN	B07TTMF3FZ
Amperage Capacity	4.4 Amps
Brand Name	SOLPERK
Connector Type	USB
Customer Reviews	4.3 4.3 out of 5 stars (453)
Customer reviews	4.3 4.3 out of 5 stars (453)
Date First Available	7 December 2019
Efficiency	High Efficiency
Included Components	1 solar panel + 1 charger controller + 1 mounting bracket +1 alligator clips +2 screws
Is Discontinued By Manufacturer	No
Item Weight	2 kg
Item model number	20W
Manufacturer	SOLPERK
Manufacturer	SOLPERK
Manufacturer Part Number	20W Solar Panel
Material Type	Glass
Maximum Power	20 Watts
Maximum Voltage	12 Volts
Model Number	20W
Number of Items	1
Number of Packs	1
Output Voltage	12 Volts (DC)
Product Dimensions	37.08 x 33.53 x 1.78 cm; 2 kg
UPC	674551501677
Unit Count	1 Count

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