How To Charge Solar Panel Without Sunlight?

solar lights and indirect sunlight

solar lightsare best charged by the sun. however, if you’re in the midst of winter or you’re garden doesn’t get much sunlight, there are other ways to charge your lights.

it’s true that your lights will still charge on a cloudy day when the sun isn’t present.

however, it’ll collect and run on less energy, causing them to die quicker.

• the best way to charge solar lights is with sunlight. however, even if you don’t have access to direct sunlight, you can still charge your solar lights in other ways.
• in overcast or winter weather, you can easily charge solar lights with indirect sunlight.
• what’s more, you can even charge your solar lights with no sunlight at all!
• solar panels do not need direct sunlight to work. most rooftop solar panels start producing electricity shortly after sunrise on a clear day.
• however, the amount of power produced by a solar panel is closely related to the amount of sunlight present.

incandescent bulb charging

solar lights are designed to harness power from the sun.

however, some of the light wavelengths that are emitted from incandescent bulbs can be absorbed by the photovoltaic cells in the solar panels on your light fixture.

• simply position an incandescent bulb over the solar panels, as close as you can, to maximise light absorbency. allow the future to be charged for 6-12 hours, and use a 60-watt to 100-watt bulb for faster charging.
• charge your solar lights with light from an incandescent bulb. the light from most incandescent bulbs is usually able to charge a solar light, although not as effectively as natural sunlight.
• place the solar panels directly underneath a household light to charge them as quickly as possible without sunlight.
• place your solar lights as close to the light bulb as possible. the further away it is from an incandescent light bulb, the longer it will take your solar panel to charge.
• use a bulb with a high wattage to speed up the charging time.
• for best results, charge your solar panels for at least 12 hours if you’re using incandescent lights.

fluorescent lighting

fluorescent lights emit a broad spectrum of light which can be absorbed by the photovoltaic cells in solar panels.

• place your solar panel light fixture under a fluorescent light bulb as close as you can to the bulb.
• leave the solar panels to charge for 6-12 hours, similar to the last option.
• for faster charging, opt for compact fluorescent lamps (cfls) or tube lights.

led light charging

as led bulbs produce bright, consistent lighting, they serve as a great alternative to sunlight for charging solar panels.

• to charge your solar lights, position the solar panel as close as you can to the light bulb, ideally a few inches away.
• once again, leave the lights to charge between 6 and 12 hours so they run efficiently.
• for a quicker job, use high-efficiency led bulbs, such as headlamps and torches.
• use led lights to charge a solar light when you’re far from home.
• battery-operated led lights, like led flashlights, are also able to charge solar lights.
• this is the best way to charge solar lights when you don’t have access to indoor lighting, such as when you’re camping.
• charge your solar panels for at least 10-12 hours if you’re using an led light to do so.
• like using an incandescent bulb, this method is really only worthwhile if you’re already using an led light for some other purpose.

mains power supply

many solar lights are equipped with usb ports or connectors for charging by electricity.

• this means that during cloudy, rainy, or darker days, you can charge your solar lights by plugging them into a mains power outlet.
• if your light doesn’t come with an adaptor, use a traditional usb charger.
• leave the lights to charge for several hours to reach full power.

reflective surfaces and mirrors

one innovative technique to increase the efficiency of solar panels is to direct more light onto them with reflective surfaces.

• mirrors, aluminium foil, or specially designed reflectors can direct light onto solar panels.
• positioning one or more of these around the panels increases the amount of light hitting the photovoltaic cells.
• the reflectors should be angled strategically to collect direct or ambient light and focus it onto the solar panel.
• ensure the reflective surfaces are free from dirt or dust, and adjust the surfaces as necessary as the sun changes position.
• use mirrors to redirect sunlight to your lights, if needed.
• if the solar panels are positioned underneath a shadow, place a mirror nearby so that it reflects sunlight onto the panels.
• this isn’t a very efficient solution, though, so only resort to this if you can’t move the solar lights themselves into a better position.
• go with mirrors that are about twice the size of the solar panel.
• this will increase the chances of the panels receiving as much sunlight as possible.
• for best results, position the mirrors diagonally on the ground so that they’re in a fixed position and lay the solar panels alongside them.
• this way, you don’t have to suspend the mirrors somewhere above the solar panels.
• note that this method also requires you to frequently reposition the mirror, since the sun moves pretty rapidly across the sky.

cloudy weather, shade, rain, and snow

• clean your solar panels when using them in cloudy weather.
• move the lights to be in the best position for receiving limited sunlight.
• while solar panels perform best under direct sunlight, they can still produce solar energy in the shade, during cloudy weather, in the rain, and while it snows.
• there are many situations in which solar panels may not get direct sunlight.
• they may be covered by shade from surrounding buildings or trees, are turned away from the sun, or are simply affected by weather conditions like clouds, rain, or snow.
• depending on the density of the clouds, a stormy day can cause anywhere from a small to a very large reduction in the output of solar panels
• additionally, even partial shade from a tree, a building, bird droppings, or snow on solar panels can reduce the output of the whole panel by a lot, so you have to be careful to avoid shade on your solar panels as much as possible.

turning lights off while charging

• turn off the lights and let them charge more efficiently for 72 hours.
• it’s recommended that you do this on a regular basis (e.g., once a month) in order to keep your solar lights working as effectively as possible.
• this technique is known as a “deep charge” in the solar lighting industry.

artificial light placement at night

• avoid placing your solar lights near street lights or porch lights.
• when solar lights are exposed to high-intensity light in the evenings, their sensitivity will decrease over time.
• for best results, place your lights as far away from artificial light as possible when using them in the evenings.
• street lights, porch lights, and other types of automatic outdoor lighting are the most common causes of reduced solar light sensitivity over time.
• note that this only applies to evenings when your lights are supposed to be running.
• it’s perfectly fine to expose your solar lights to artificial lighting when they’re turned off or charging.

solar panels and batteries

• you can’t charge a solar panel, it has no storage capacity.
• you can charge a battery using a solar panel, if you can find another light source.
• if you just want to test a cell in isolation, shining a desk lamp right at it works.
• but that’s impractical for a whole panel.
• given typical panel and lighting efficiencies, you’d need something like 1500w of actual light to run a 300w panel, probably about 3kw of led lights or 20kw of incandescent.
• you can’t charge a solar panel even with sunlight.
• solar panels produce electricity when bright light hits them.
• if you want to charge something up that would be the batteries that will store the power for use at night when there is no sun.
• you are charging a battery using a solar panel.
• it is more efficient to take the battery to a place where you can charge it with a battery charger.
• the alternative is to shine a big light connected to an extension cord onto the solar panel to charge the battery. (inefficient).