If we do not consider the rebates that some countries offer on solar panels, the payback normally runs between 20 and 25 years. The long payback though ignores the increased benefits to the planet and the possibility of increased electric costs over that time period.
Panels will also degrade with time. Warmer climates may see a slightly longer payback period, due to the decreased performance of solar panels. I have several panels on my home and they actually produce more power in the winter months, despite the shorter daylight periods, due to the cooler temperatures
No set answer to that. It depends on the capacity of the battery, the size and efficiency of the solar panel and the intensity of the sunlight.
That depends on the amp-hour capacity of the battery.
take a solar panel & add wires on the panel & connect these wires to the small appliance!!!!
It doesn't seem that it takes very long at all, maybe an hour or two, depending on your work speed
well, something that has very long battery life or just bring a solar panel connected to a socket
A very long time. I would guess 48 hours of sunlight at the very least. Even that may not be enough to fully charge the battery. It really depends on how much amperage the solar panel is putting out.
Most likely not. In order to charge the battery to its nominal rated 4.8 volts, youreally need a source capable of more than 4.8 volts open-circuit.You need to take the solar panel and a voltmeter, and measure the output voltageof the solar panel with no load connected to it. If it's more than 4.8 volts, then itwill charge your battery.But . . .That's not saying anything about how long it will take. 0.4 watt is not an awful lotof power, and your solar panel will not even deliver that much before its outputvoltage sags to 4.8 . So I would think that this solar panel will not be an acceptablecharger for that battery.
From start to finish, for a residential house. It could be done in a month. Only a few (3-5) days would workers be on the roof.
It usually takes a while. Although this may seem like as something bad, it will eventually pay for itself and will be a great benefit economically and ecologically. The time it will take for it to pay for itself depends wholly on the amount of sun the place gets.
"Wp" means Watts peak. It is the maximum amount of power a solar panel could produce in perfect conditions. It is not an attainable value. The way they determine this amount is to take short circuit current and multiply it by open circuit voltage. Actual max power is closer to 56% of the WP rating.
2 hours
A long time.