200 watt solar panel generates how much watts of electricity per month?
I've operated a 25 kilowatt (kw) solar panel system for two years (44 panels, rated at 90 watts each, just about like yours). It averages 0 kilowatt hours (kwh) per day, but clear days get about 60 kwh. My system generates about 3300 kwh per month (we dump directly to grid), worth about $4,000 per year. Payback for my system, which cost $00,000 (after utility rebates and tax credits), is 25 years (the expected lifetime, coincidentally). Under similar conditions, your 200 watt solar panel would average 820 watt-hours per day, or about 25 kwh per month, worth $2.50.
When it exposed to light, it starts generate electricity. Now the 200W written on panel is not its all time power. Its Watt Peak (200Wp) , it means when sun is at peak. it is around PM - 3.30PM daily in India(plane area). And panel never give 200w for more than 5 years, the efficiency reduced up to 0% at completion of 5 years of panel and 20% up to 25 years of life of panel.
Depends where you live. Each kWp will generate in a year about 750kWh in northern England, or 900kWh in the south. About ,00kWh in the south of Germany or up to 2,200 kWh in the Californian desert. The farther you are from the equator, the bigger the difference between summer and winter months: in S California summer months may only generate 2 times as much electricity as winter months. In the UK it can be 4-5 times as much. 200 W is 0.2 kWp so divide the numbers I gave by 5 and then divide by 2 to get the 'average' month - you really need to look up 'insolation tables' for your area though!
Theoretically, for every hour that bright, direct sun shines on the panel, 200 watt-hours (0.2 kWh) of energy will be produced. In practice, the answer depends on temperature, orientation of the panel, and how many hours of sun are hitting it, including clouds and seasons. This varies tremendously by geographic location. In my region of California, such a panel will produce about 33 kWh a month on average - more in summer, less in winter.
watts of electricity per month is not a valid measure. You want to know watt-hours per month. A fair assumption may be 5 good hours of sunshine per day, or 50 hours per month. Thus, a 200W panel can produce 30 kilowatt-hours of electricity per month. Many more factors are involved, including your controller, battery charger, wiring, and battery system. At a typical retail rate of $0.5/KWh for electricity, this is worth $4.50 per month. Still, solar power can be cost-effective over the long haul.
