12V 120W Solar Panel

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CAN THE SOLAR PANEL BE MOUNTED ON A FLAT ROOF OR WALL?

Yes. It is fine to mount the panel on a horizontal surface such as a roof or on a vertical surface like a wall as long as the panel receives full sun for a reasonable period of the day. You will gain 25% performance if the panel is tilted toward the sun and faced in a northerly direction, since this enables the maximum amount of solar energy to reach the panel.

WHAT APPLIANCES CAN I RUN ON THE SOLAR PANEL?

Solar panels gain all their energy from the sun and are therefore limited in their ability to operate 12VDC appliances directly. Although they may run very small appliances, it is more common to connect the solar panel and appliance to a battery. This method is more effective, provides a stable voltage and allows the appliance to continue to operate even if the panel is shaded.

CAN I RUN MORE THAN ONE SOLAR PANEL?

It is possible to run multiple solar panels for higher voltage applications or for more power:
1. Placing 2 solar panels in “Series” will make them suitable for use on 24VDC battery systems or vehicles.
2. Placing 2 or more panels in “Parallel” will still make them suitable for 12VDC use but will provide twice as much power (current).

WILL THE SOLAR PANEL CHARGE MY FLAT BATTERY & HOW LONG WILL IT TAKE?

1. The SPP20 is designed for “topping up” and maintaining batteries. Given sufficient time, it will put some charge back into the battery.
2. The SPP40, SPP60, SPP80, SPP120-MC4, SPP135-MC4 and SPP160-MC4 will charge a battery. Recommended charge times vary depending on battery type and panel size.

I AM GOING ON A 4WD TRIP. HOW MANY SOLAR PANELS WILL I NEED?

It really comes down to how many appliances are drawing power from your battery. The number of solar panels required should be based on how much power is used over a 24-hour period.

Most people when they go away would run a fridge and a couple of lights to cook with. This requires calculating daily energy consumption to determine how many panels are needed.

A solar system that produces around 45 amps per day is typically needed. Assuming around 10 hours of usable sunlight per day, this equals approximately 4.5 amps per hour.

Two SPP40 solar panels wired in parallel or one SPP80 panel producing around 4.6 amps per hour should be enough. You may need to charge the battery by running your car for short intervals during cloudy weather.

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