Same day shipping on 200 Watt Mono solar panels available in both 12V or 24V. Good quality, high efficiency, and discreet blackout appearance absorbs and radiates the most energy. Panels measure 32 inches across and 54.4 inches long, weighing in at 24.2 pounds. This is a very convenient size solar panel. Depending on how many you planned on wiring in parallel or series, the 12V or 24V model may be more convenient for you. There is no difference in efficiency, they are just wired differently. How many solar panels do you need to power your solar air conditioner? A surprisingly accurate estimate of real world production is to assume you get 3 hours of full watt production from a solar panel - so a 200 watt panel will safely make 600 watt hours of energy on a given day. This gives you a good safety margin to meet your daily kilowatt hour needs even during spurts of bad weather. Panels never produce 100% of their rated power. But even on rainy days, solar panels produce power, however much less. Therefore, if room on your property allows, always install as many solar panels as your space allows that you are comfortable with. You cannot have too much - there is nothing to use up - the panels will only give as much power as you actually need, and having more will not hurt your system in any way. For example you determine that you need a daily harvest of 10 kWh, which is enough for a small air conditioner and efficient appliances. Simple example:10,000 watt hours / 3 hours / 200 watts per panel = 16 panels recommended (rounded down from 16.6).    We can help you estimate your needs and work out a package deal on your budget.