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Question:

How much power does the solar panel produce?

I have a panel that quot;deep breatheproduces at 4% efficiency, what can it power, It's about 4ft by 2ft

Answer:

I sincerely doubt that you have a solar panel that is 4% efficient at converting sunlight to electricity.
confident. this relies upon and the dimensions and performance of the image voltaic panel and the capability intake of the easy bulb. in case you % consistent capability whilst the solar isn't attainable, the panel must additionally be powering a financial business enterprise of batteries and capability drawn from them. My closest publicity to image voltaic panels turn right into a neighbor who took a single one with him tenting to capability a single fan. It did an excellent activity of airing his tent throughout the day so it did no longer warmth like an oven. This turn into an application the place the capability turn into in simple terms mandatory whilst the solar turn into shining. evaluate to windmills initially put in to pump water for livestock and retrofitted with electricity turbines *and* a storage battery. the ordinary use for the electrical powered energy turn into for listening to radio interior the evening, whilst the reception turn into extra effectual. The use with a battery somewhat than in simple terms for instantaneous capability is shown as being the norm somewhat than the exception in living house applications.
I also doubt your claim of 4% efficiency. That strength solar panel is brand new technology (this year) and is not available in retail sizes yet. You probably got duped by some false marketing... In any case; even assuming you had a 4% solar panel, there are too many things for us to give you an accurate assessment of the power production. Clouds, location on earth, season, angle of the solar panel; these are all things we need to know to calculate it. Odds are it should have the average rate it produces electricity written on the back panel or with the instructions that came with it. I know of no solar panel retailers that do not also offer free installation. You should get your money back or get that free installation (and then you never have to worry about how much power it has, it just gets you what it can).
Area is 4' * 2' * (0.3048m/ft)^2 = 0.743m^2. Incoming solar (assuming optimally oriented panel) averages about kW/m^2, so 743W max gross. 4% efficiency yields 300W. Most panels are about 0% - 5% efficient, which is about W. In either case, figure about /2 the theoretical efficiency for about 2 hrs per day. so, you can run something from 50 to 50W about 2hrs per day. Too small for any appliance except maybe a laptop or light bulb. Panels typically make about 2V, not enough to run household stuff anyway. Normally panels are used to charge batteries, then an inverter takes power from the battery to run your appliances. Good luck!

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