To charge any battery the voltage of the input must be more than the battery's output.
You can't charge the battery with those 245 watts unless they are being 'pumped into' the battery at a higher voltage than the battery puts out. If you can exceed the voltage of the battery, that 245 watts will definitely charge a battery.
1 watt will do the job.
You sure can! I charge a marine battery with a 75 watt panel and it goes from a fairly good discharged state to fully charged in about four days.
about 500watts/meters of irradiance
To charge a 12V, 45Ah battery, you'll typically want a solar panel with a rating of at least 100 watts. This is because, in addition to the battery's capacity, you'll need to account for inefficiencies in the charging process and variations in sunlight availability. A 100-watt panel can generally provide enough power to fully charge the battery within a day of good sunlight. However, if you anticipate less sunlight or want faster charging, consider using a larger panel.
Well, isn't that a happy little question! To charge a 12V 180Ah battery, you'll need a solar panel with a wattage of around 180-200W. This should provide enough power to charge your battery efficiently. Just remember, it's all about finding the right balance between the size of your solar panel and the energy needs of your battery.
To charge a 200 amp-hour battery with a 1000-watt solar panel, you first need to convert the amp-hours to watt-hours. A 200 amp-hour battery at 12 volts has 2400 watt-hours (200 Ah × 12 V). If the solar panel operates at peak efficiency, it can produce about 1000 watts, which means it would take approximately 2.4 hours of peak sunlight to fully charge the battery (2400 watt-hours ÷ 1000 watts). However, considering factors like inefficiencies and varying sunlight, it may actually take longer in practice.
You need to provide many more details. So assuming that the panel voltage is reasonable, the panel is clean, it is sunny and the panel is pointed at the sun. Then it will take about 225/7 hours to charge the battery. About 300 hrs. But in fact charging is only about 85% efficient (charge at 14 V get energy out at 12V or so). This ups the charge time to maybe 350 hrs or so. Charging can be improved by inserting a MPPT charger between the battery and the panel. This bit of electronics decouples the battery voltage and the panel voltage allowing the panel to be operated at its' most efficient voltage. That might knock off 15% of charge time bringing you back to 300 sunny hours.
There is too much information there. Charging a 100 amp-hour battery fully would take 18 hours at 5.5 amps, or 6 hours at 16.67 amps. At 5.5 amps the power would be 12x5.5 or 66 watts, and this is the rating of the solar panel required. That would be about 0.4 of a square metre.
The power output of a solar panel is typically measured in watts peak (Wp) or kilowatts peak (kWp). For a typical residential solar panel, the power output can range from around 250 watts to 400 watts per panel. Commercial or utility-scale solar panels can have higher power outputs reaching up to 500 watts or more per panel.
The power output of a solar panel is typically measured in watts (W). A common residential solar panel has a power output ranging from 250 to 400 watts. Commercial solar panels usually have higher power outputs, up to around 500 watts or more.
The amount of watts that a solar panel system can generate varies depending on factors such as the size of the system, efficiency of the panels, sunlight intensity, and weather conditions. On average, a residential solar panel system can generate between 250 to 400 watts per panel.