This is a nice piece of kit from Renogy which i have used for some time without issues. Click on the image to buy direct from Renogy or use the button below to buy from Amazon directly.
Max Power at STC: 400W
Open Circuit Voltage: 47.2V
Short Circuit Current: 11A
Optimum Operating Voltage: 40V
Optimum Operating Current: 10A
Maximum System Voltage: 600VDC
Maximum Series Fuse Rating: 15A
Operating Temperature: -40°F~185°F / -40℃~85℃
Dimensions: 2838*855*20 mm (111.8x33.7 x0.8 in)
Folded Dimensions: 708*855*80mm(27.9*33.7*3.2in)
Weight: 13.7kg (30.2 lbs
Click the image to buy direct from Aferiy or use the button to buy from Amazon
AFERIY 200W portable solar panel boasts a conveniently designed handle, ensuring effortless transportation. With a minimal weight of merely 4.5 kg, this solar panel outshines other models in the market, significantly lightening your load. When folded, its compact dimensions measure 54.5 x 53 x 5 cm. Whether for camping, RV trips, gardening endeavors, or a plethora of outdoor activities, this versatile solar panel is your ultimate companion.
This solar panel photovoltaic packs 300W of power yet is only 0.6cm thick and weighs only 7.5kg., making it easier to mount,transport, hang, and remove.solar panel usb port output
This 100W solar panel is especially designed for higher conversion efficiency and portability, a perfect companion for most portable solar generators/power station on the market. Constructed of high-efficiency solar cells, it can convert up to 21.5-23.5% of solar power into free energy.
Renogy 400W solar panel provides 36V huge power for your solar generators, such as Phoenix1000 and other large generators on the market. Effectively shorten charging time, make you enjoy the sunshine energy as soon as possible
Max Power at STC: 200 W
Open Circuit Voltage: 23.40V
Short Circuit Current: 10.50A
Optimum Operating Voltage: 20.16V
Optimum Operating Current: 9.92A
Cell Efficiency: >22.6%
Operating Temperature: ’14°F to 149°F(-10℃ to +65℃)
Dimensions: 25.0 x 21.1 x 2.2 in / 635 x 536 x 55 mm(fold),94.1 x 21.1 x 0.2 in / 2390 x536 x 4 mm (unfold)
Weight: 17.6 lbs. / 8.0 kg
Maximum Power at STC: 100W
Open-Circuit Voltage (Voc): 21.6VMaximum Operating Voltage (Vmp): 17.6VShort-Circuit Current (Isc): 6.10A Maximum Operating Current (Imp): 5.68A
Maximum System Voltage: 600VDC(UL)
Weight: 8.80 kgs/19.4lbsFolded Dimension: 53.59 x 54.61 x 7.87
Most solar panels are usually rated at 12 volts which means if you have a 24 volt battery system, you will need to wire two panels in series, or get a single higher voltage solar panel (24v) to generate enough voltage to charge a 24V battery.
Note: A 12v solar panel cannot charge a 24v battery!
This guide assumes you are using 2 x 12v solar panels & an MPPT solar charge controller that is suitable for 24v systems.
To make a 24v system we need to join the 2 x 12V panels in series.
When we join solar panels in series we increase the voltage, but the amperage remains the same.
Example: - if you connect two solar panels with a rated voltage of 40 volts and a rated amperage of 5 amps in series, the voltage of the series would be 80 volts, while the amperage would remain at 5 amps.
This simply involves joining the "POSITIVE" MC4 terminal of one solar panel to the "NEGATIVE" MC4 terminal of the second panel.
The cables will usually have a sticker showing plus or minus symbols to aid you.
Take the remaining "NEGATIVE" of the 1st panel and the remaining "POSITIVE" terminal on the 2nd panel & connect these to your solar charge controller.
It is suggested you make sure the batteries are connected to the controller 1st!
Your solar charge controller should detect the solar panels new voltage and will begin to charge your battery.
The alternative is to get a single solar panel with a high enough voltage to charge the higher 24V battery voltage by itself.
Any panel with an open circuit voltage of >30 (Voc)* would achieve this, but in the winter it may struggle to reach a high enough voltage.
Aim for >45 (Voc)* or more.
You do of course have to make sure that your solar charge controller is rated for 24 volts.
Basic PWM controllers are generally only available in 12 volt versions, or they will have a low input voltage range which will not be suitable for larger solar panels.
MPPT controllers can charge both 12 or 24V systems.
*Voc - This is the open circuit voltage of your solar panel with no load on it, it is read using a meter between the positive & negative outputs.
The panel will have a label with this number for you!
Parallel Connections
Parallel connections are the opposite of a series connection.
When we wire solar panels are in parallel, the positive terminal from one panel is connected to the positive terminal of another panel and the negative terminals of the two panels are connected together, usually using splitters like these.
In this case the panel voltages remain the same, but the panel amperage increases.
Example: - if you connect two solar panels with a rated voltage of 40 volts and a rated amperage of 5 amps in parallel, the voltage would remain at 40 volts, while the amperage would increase to 10 amps.