Written I assume that you have a 1 tonnage air conditioner,if you wish to know the required tonnage of air conditioner required for household purpose,then it's important that you know the size of your room,since it would determine the amount of heat to be removed,the electrical appliances operating in your room,the number of people living in a room-these all parameters are required to know the heat load on the air conditioning system,then it's imperative to know the direction/orientation of your room,size of the glass and you can plug in these values on a tonnage calculator and it would tell you the size of the air conditioner.You can easily google it,not a problem.If you are using a BEE 3 star rated 1 Ton Split AC,then it would roughly consume about 1000 watts(1KW) or 1 unit of electricity an hour.Under clear skies and good sun,each square meter receives a 1000 Watts of solar energy and most of the solar PV panels in the market have an efficiency of about 15%.So for a square meter,you would be able to generate 150 watts of electricity,if i extend it to a 1000 watts,it would require a space of 7 square meters plus some free space,so overall you need to have 10-12 square meters for setting up the solar panels on your roof top.

Very hot temperatures have an adverse affect on the solar power as the efficiency reduces with higher temperatures,so they work with good efficiency in the colder climates.Assuming that the sun would shine for 5-6 hours a day,so you would be able to generate about 5-6 units of electricity and if the load connected is just an AC,you would be able to run it for nearly about 5 hours for a 1000 watt 1 ton split AC.who fixes window ac unitsYou need the complete setup for installing roof top solar PV panels if you are generating electricity off grid(not connected to the grid).new outside ac unitAs shown in the picture,apart from the solar panels,you would require a charge controller so that the battery does not gets overcharged.ac unit comparisonsCharge controller would also protect the solar panels from any reverse current moving back to the solar panels.

Batteries-Deep cycle batteries should be used for a solar PV system-please note that car batteries should never be used for solar PV system.There are multiple types of batteries available in market. The maintenance free ones are the most expensive and they also last no longer than 4-5 years. The other regular lead batteries need to be filled with distilled water regularly for right operation but if maintained well can run for long and are cheaper than maintenance free batteries,Coming to inverter-either modified sine wave inverter/pure sine wave inverters,for sensitive electronics and household appliances you should always go for pure sine wave inverters,the inverter size should be high enough.Sizing of inverter depends on the wattage of appliances connected to it. The input rating of inverter should never be lower than the total wattages of the appliances.  It is always better to have inverter wattage about 20-25% more than that of the appliances connected. This is specifically essential if the appliances connected have compressors or motors (like AC, refrigerator, pumps, etc), which draw high starting current.

Most inverters available in market are rated on kVA/VA or Kilo Volt Ampere/Volt Ampere. In ideal situations (power factor of 1) 1 VA = 1 Watt. But in real power factor varies from 0.85 to 0.99.So one can assume 1.18 VA = 1 Watt. So if you have a setup where the total wattage of the system is 1000 Watts, it means your inverter size required is more than 1180 VA or 1.18 kVA (add some extra to be on a safer side).ing to overall cost for the setup-Total it would cost you about Rs.80,000-90,000 depending upon the price of the solar panels per Watt you purchase(Rates are about Rs.45-Rs.50/watt for solar panels) and then you have inverter of 1.5KVA,mounting structures,wirings,charge controllers,please note that i am giving you a rough assumption but the range would be more or less the same.Why Does Your Air Conditioning Need Recharging? If your car's air-conditioning system blows only warm air on hot days, it's probably because it is low on refrigerant, and the most likely cause is a leak somewhere in the system.

Though many vehicle owners think they need to recharge or "top off" their air-conditioning system with refrigerant on a regular basis, such as annually, that's not the case. If the air conditioning stops working (but the fan continues to blow warm air), a leak in a hose, connector or other part of the system is probably the culprit. During the winter, you may notice that the defroster isn't clearing fogged up windows, and that also is a sign you have a leak. Most defrosters engage the air conditioning to dehumidify the air. If there is a leak, the air-conditioning system on most modern vehicles is designed to shut down once the refrigerant level drops low enough in order to prevent damage to the air-conditioning compressor. Note that we are talking about "refrigerant," not Freon, the brand name for a type of refrigerant that is no longer manufactured in the U.S. because it can damage the ozone layer. Contemporary vehicles use a refrigerant known as R-134. The EPA provides helpful information for consumers about whether they should have their air conditioner topped off with refrigerant or evacuated and recharged, found here.

The EPA notes that a repair shop (or a do-it-yourselfer) can't tell precisely how much refrigerant is in the system without the proper equipment — gauges to measure how much pressure is in the system — so how much they add while topping off the system is largely a judgment call. By performing a complete evacuation and recharge (a more expensive procedure and one that should be done by a professional), the EPA advises, the repair shop will be able to test the complete system and recharge it with the precise amount of refrigerant recommended by the vehicle manufacturer. The EPA adds that usually there is no reason to clean the system unless it is opened up, such as to check for leaks or other problems. When is it time to add or replace the refrigerant? You could be proactive and have it done before you experience problems, but you shouldn't need that more often than every few years at the most. If your air conditioning is losing its potency, even after topping it off, then you probably have a leak.