Harness the sun to keep your batteries charged anywhere
Setup Time
5-10 minutes
Power Output
100W+
Compatibility
Multiple battery types
Orientation
Clear the pad, lay out your parts, and spot the color coding so setup flows smoothly.
Choose a location with maximum sun exposure throughout the day. Consider the sun's path from sunrise to sunset to optimize panel placement. Avoid shaded areas from trees, buildings, or vehicles. A flat, stable surface works best, though the panels can be angled for better sun capture.
Lay everything out before you start so nothing is missing mid-setup.
setup
Deploy your solar panel and connect it to your battery system
Take your Grecell solar panel out of its carrying case or storage location. The panel folds compactly with a convenient red carry handle for easy transport.
Keep It Clean
Dust and dirt on solar panels can significantly reduce charging efficiency. Wipe panels clean before each use.
Photo of folded Grecell solar panel with red handle and branding
Fully unfold the solar panel and position it facing the sun. Orient the panel to capture maximum sunlight based on the sun's position and predicted path throughout the day. The Grecell panel has four connected sections that unfold accordion-style.
Sun Tracking
For maximum efficiency, reposition your panel every few hours to follow the sun's movement across the sky.
Photo of fully unfolded four-panel Grecell solar array on gravel ground
Locate the zippered storage pocket on the back of the solar panel. Unzip this pocket and carefully pull out the connection cables. These cables are pre-attached to the panel and include multiple adapter options.
Photo of unzipped storage pocket with cables being removed from panel
Identify which connector type your portable power station requires. The Grecell panel comes with multiple adapters for different battery brands. For Jackery Explorer models, you can use the direct red and white connector. For other batteries, you may need to use specific adapters.
Critical: Check Polarity
Always verify that positive (+) connects to positive and negative (-) connects to negative. Reversed polarity can damage your equipment.
Close-up of Jackery Explorer input port with red and white connector being inserted
If using SAE-type adapters (the two-prong connectors), it's critical to verify polarity before connecting. SAE adapters can sometimes have reversed polarity, meaning the positive and negative terminals may not match between the panel and battery. Look for the + and - markings on both the cable and the battery input.
Polarity Is Critical
This is the most important step. Connecting with reversed polarity can permanently damage your battery or solar panel. Always double-check before plugging in.
Close-up of SAE adapter connectors showing red and black wires with polarity markings
Once you've verified polarity is correct, firmly connect the adapter to your battery's solar input port. For batteries requiring special adapters (like EcoFlow's yellow XT60), first connect the SAE-to-XT60 adapter, then plug into the battery.
Photo of solar cable connected to EcoFlow battery input port with yellow adapter
Photo of battery display showing input power reading confirming connection
Check your battery's display screen to confirm that solar charging has begun. Most portable power stations will show an input wattage reading when successfully receiving solar power. The display should indicate power flowing into the battery.
Optimize Your Charging
If you're getting low wattage, try adjusting the panel angle or moving it to a sunnier location. Cloud cover and panel angle dramatically affect output.
Close-up of Jackery display showing 93W input and 94 percent battery level
If you want to charge multiple batteries simultaneously, use a splitter cable. The splitter connects to the solar panel's output and provides multiple connection points for different batteries. This allows you to distribute solar power across your entire battery bank.
Shared Power
When charging multiple batteries, the solar panel's total output is divided between them. Charging will be slower than charging a single battery.
Photo of splitter cable with multiple red and black output wires
Photo of two EcoFlow batteries connected via splitter cable to single solar panel
monitoring
Keep your solar setup running efficiently throughout the day
Periodically check your battery displays to ensure charging continues efficiently. Watch for changes in input wattage that might indicate the panel needs repositioning as the sun moves.
Photo of battery display showing active solar charging status
As the sun travels across the sky, reposition your solar panel to maintain optimal charging. This can increase your total daily power generation by 20-30% compared to a fixed position.
Maximum Efficiency
The best charging occurs when the sun's rays hit the panel at a 90-degree angle. Adjust throughout the day for peak performance.
Photo of solar panel being angled toward afternoon sun position
pack up
Safely disconnect and store your solar panel system
When you're done charging or ready to pack up, disconnect all cables from your batteries. Always disconnect from the battery side first, then from the panel side.
Photo of cable being unplugged from battery input port
Carefully coil all cables and adapters and return them to the zippered storage pocket on the back of the solar panel. This keeps everything organized and prevents losing small adapters.
Photo of cables being coiled and placed back into panel storage pocket
Fold the solar panel back into its compact configuration. Fold accordion-style in reverse order, ensuring no cables are caught between panels. Use the red carry handle for transport.
Storage Location
Store your solar panel in a cool, dry place. Avoid leaving it in hot vehicles for extended periods, as extreme heat can degrade the solar cells over time.
Photo of solar panel being folded back into compact storage configuration
Walk the perimeter once and confirm these items before moving in.
You're now generating clean solar power at camp! Your batteries will stay charged throughout your trip, giving you reliable power for lights, devices, and appliances. Check back periodically to reposition the panel and maximize your charging efficiency.
The Grecell solar panel includes multiple adapter cables that work with virtually all major portable power station brands including Jackery, EcoFlow, Goal Zero, and generic batteries. The included adapters eliminate the need to purchase brand-specific cables separately.
A zippered storage pocket on the back of the panel keeps all cables and adapters organized and protected. This thoughtful design prevents losing small adapters and makes setup faster since everything stays with the panel.
The accordion-style folding design with four connected panels provides high power output (100W+) while folding down to a compact, portable size. The red carry handle makes transport easy, and the panels are lightweight enough for backpacking or car camping.
Using an optional splitter cable, you can charge multiple batteries simultaneously from a single solar panel. This is perfect for group camping or when you need to keep several power stations topped off throughout the day.
Photo of splitter cable connecting solar panel to two batteries simultaneously
Panel Type
Foldable monocrystalline
Number of Panels
4 connected sections
Power Output
100W+ (conditions dependent)
Included Adapters
Multiple (Jackery, EcoFlow, SAE)
Storage
Integrated zippered pocket
Portability
Folds compact with carry handle
Setup Time
5-10 minutes
My battery isn't charging even though everything is connected. What's wrong?
First, check the polarity of your connections—reversed polarity is the most common issue, especially with SAE adapters. Verify that + connects to + and - connects to -. Also ensure the panel is in direct sunlight (not shade), cables are fully seated in ports, and your battery isn't already at 100% charge (some batteries stop accepting input when full).
The charging wattage is much lower than expected. How can I improve it?
Low wattage is usually caused by poor panel angle or partial shade. Adjust the panel so it's perpendicular to the sun's rays—even a 30-degree angle can cut output by 50%. Check for shadows from trees, clouds, or nearby objects. Also ensure the panel surface is clean; dust and dirt significantly reduce efficiency. Finally, verify all connections are tight, as loose connections create resistance.
Can I leave my solar panel connected to the battery overnight or in bad weather?
Most solar panels and batteries have built-in protections against reverse current flow at night, so leaving them connected overnight is generally safe. However, it's best practice to disconnect and store the panel when not actively charging. Never leave solar panels out in rain, snow, or severe weather—while many are water-resistant, prolonged exposure to moisture can damage connections and reduce lifespan.
How do I know if I'm using the right adapter for my battery?
Check your battery's manual or the label near the solar input port. Common types include: barrel connectors (round plug), XT60 (yellow rectangular), Anderson Powerpole, and SAE (two-prong). The Grecell panel includes adapters for most types. If you're unsure, look for matching connector shapes and sizes. When in doubt, contact your battery manufacturer—using the wrong adapter or forcing a connection can damage equipment.
The splitter cable isn't charging both batteries evenly. Is this normal?
Yes, this is normal. When using a splitter, the solar panel's power is distributed based on each battery's charge state and internal resistance. A battery at 50% charge will typically draw more power than one at 90%. The total output is also divided between batteries, so each charges slower than if connected individually. For fastest charging, charge batteries one at a time rather than using the splitter.