How Can We Use Solar Energy To Power Air Conditioners?

In the summer, the heat is on, and that means that you have to work harder than ever to keep your home cool. It’s easy to reach for the air conditioner (AC), but the electric bill will probably skyrocket. The good news is that you don’t have to pay for electricity to cool your home.

In this blog, I’ll show you how can we use solar energy to power air conditioners and create a cool, comfortable environment for your family.

Solar energy is an alternative energy source that is free from pollution and harmful effects.  To be able to successfully install a solar panel system for your air conditioner, you must first find out what kind of solar panels you need. There are two basic types of solar panels:

Photovoltaic and Solar Thermal.

Both types work by converting sunlight into electrical energy. Both types work by converting sunlight into electrical energy. Photovoltaic (“PV”) solar cells convert the sun’s energy into electricity, while thermal solar panels use the sun’s heat to generate electricity.

Solar thermal panels are usually mounted on the roof of a building or structure, while photovoltaic panels are usually installed on the ground. Solar thermal panels produce hot water by heating water and then storing it in tanks.

The choice of which type to use depends on your specific situation. If you’re planning to install solar panels to generate electricity for your home, you’ll probably want to use solar thermal panels.

Photovoltaic panels convert sunlight into electricity. If you’re planning to use solar panels for other purposes, such as powering an electric vehicle or charging batteries for portable devices, you may want to use photovoltaic panels.

If you decide to use solar thermal panels, you’ll need to choose a type that can be integrated with your home’s existing structure. This means that you’ll need to be able to mount the panels on a roof that’s already built and installed. In some cases, you’ll also need to be able to mount the panels on the roof of an existing structure that you don’t own.

Once you’ve chosen a type of solar panel, you’ll need to find out how much solar energy is available in your area. The amount of energy you can generate depends on the amount of sunlight that falls on your solar panels each day and specifically, how much amount of energy you require to run your AC.

Soler Energy Monitor

You can determine this by measuring the amount of sunlight that falls on your solar panels during the course of a year. You can do this by using a solar energy monitor.



A solar energy monitor will tell you how much sunlight falls on your solar panels every day and how much energy it generates. Solar energy monitors are available at most hardware stores and online. If you have a solar energy monitor, you can use it to figure out how much energy you’ll be able to generate each month. To get an idea of what kind of energy you’ll be able to generate, you can use the following formula:

energy generated = (sunlight) x (energy output)

The amount of sunlight that falls on your solar panels varies depending on the time of year. In the summer months, the amount of sunlight that falls on your solar panels is usually greater than in the winter months.

Types Of Solar-Powered AC

If you want to switch to solar power in your home, you’re probably wondering how to narrow down the best solar-powered AC for your home. Before you look at specific products, it’s important to understand how different types of solar technology work.

There are three types of solar-powered air conditioning systems:

  • DC Solar Air Condition,
  • AC Solar Air Condition (ac), and
  • Hybrid Solar Air Condition.

Direct and alternating current is the way energy flows. It’s also the way electricity is delivered and consumed. DC only flows in one direction, while AC changes direction often. These currents are used in different applications, for instance, home electrical grids use alternating current, while batteries use direct current.

DC Solar Air Condition: Direct current solar air conditioning uses the DC power that is generated by photovoltaic panels. This kind of system doesn’t need an inverter to change AC power to DC power optimal for Off-grid systems because they do not require an inverter to convert the AC from the utility company into DC and then back again to AC.

ac Solar Air Condition: An alternating current (ac) solar-powered air conditioning unit is designed to work with your home’s existing power grid.  Solar power is DC electricity, but in order to use it on the electrical grid, it needs to be converted to ac power. This usually involves the use of inverters and transformers.

Hybrid solar air conditioners: A hybrid solar air conditioning system uses both electricity from the grid and solar power to reduce your cooling costs. A combination system uses a grid-powered ac/DC hybrid electric system to run the fan and compressors and is connected to a solar energy system for the compressor.

How Many Watts Does Your Air Conditioner Use?




The air conditioning is measured in watts, and the rate at which it uses energy is measured in watts per hour. Once you’ve determined that, you’ll figure out how many solar panels you need to run your air conditioner.

Here’s a look at different-sized air conditioners and how many watts they use.


Small Window Air Conditioners: 500W

Medium Window Air Conditioners: 900W 

Large Window Air Conditioning Units: 1440W

Central Air Conditioner: 3500W

Central Air Conditioner Fan: 750W


In addition to the large capacity window AC, you’ll also want to include a central air conditioning unit and an auxiliary unit. Each should be rated at least 3500 watts.

You will have to determine how many watts your AC uses and how many hours per day it runs. It helps to get an estimate of how much your electric provider charges to run the AC.

How Much Electricity Does A Solar-Powered Air Conditioner Use?



Once you know what kind of solar panels you want to use, you can figure out how many solar panels you need to install to generate enough energy to meet your monthly needs.

Solar panels come in a wide variety of sizes, depending on how much energy you want to generate. The most common sizes are 1 kilowatt (kW), 5 kW, 10 kW, 15 kW, 20 kW, 25 kW, 30 kW, and 35 kW.

An air conditioner would need about 1200 watts of solar panels for each ton of cooling capacity if it is operating in sunny conditions. One hundred Ah battery is required per Ton for each hour of anticipated running time. This will let you run when the sun isn’t out and will also provide a backup for your motor to ensure that it runs smoothly even during times of extreme heat. It’s important to know these things before building a solar system to run an air conditioner:

Why are tonnes rather than watts used to grade AC?

Air conditioning units aren’t the same. If we measured their electrical kilowatt ratings for comparison, it wouldn’t show their actual cooling efficiency. The 2 AC units rated at 1.5 kW might not have the same cooling power.

An AC is a unit of measurement used to measure the power consumption and cooling requirements of central air-conditioning systems. It’s a commonly used measurement of weight.

A ton is a huge load. This unit represents the amount of cooling needed to melt 2,000 pounds of ice in one day. The weight of a ton of coal equals 1000 pounds. The more weight, the more volume, and the more air can be cooled each hour. One ton can be represented as 12,000 BTU/h (British Thermal Units per hour) or 3.5 kW. This means that a 1-Ton air conditioner has a cooling capacity in Watts of 3516 Watt-hours per second or 3516 watts of electricity, which is the amount.

A one-ton air conditioner has a cooling capacity of Watts:

12,000 BTU x 1055 ÷ 3600 ÷ 24 h = 3516 Watts (cooling)


What Is EER Value In AC?

EER stands for “Energy Efficiency Ratio” and it tells you how well your air conditioner or heater works. Divide the BTU numbers for your ac units by their electrical rating, and you come up with a ratio that indicates how much electricity is generated.

An efficient AC unit can have an EER of 11, for example. AC, with an EER rating of more than 10, is recommended for climates that get warmer in the summer. The EER weather rating system is based on an outdoor temperature of 95°F, an inside temperature of 80°F, and 50% humidity.

SEER ratings are more common these days because they take into account an air conditioner’s cooling capacity over a range of outside temperatures. The S stands for “Seasonal”.


How Much Does Running An AC Cost Per Hour?

This is extremely variable and depends on a number of things as hereunder:

  • What is the AC unit’s efficiency?
  • How frequently do you run it throughout the day?
  • The climate outside
  • The price of your power per kWh

It is important when shopping for heating and cooling services to be sure to size the system correctly. When sizing your system, keep in mind the above factors.  An air conditioning unit should pull around 7 amps per ton of its cooling capacity.

If the tonnage (weight) changes then the change in amp can be calculated. The amp/tonnage relationship changes as the cooling power increases. This changes when the tonnage changes. It’s generally accepted that the amp/tons relationship changes as the cooling power increases.

2 ton equates to 15 amps

3 ton equates to 18 amps

4 ton equates to 21 amps

What Is Rated Load Amps (“RLA”)?

RLA is a mathematical calculation, used to determine if a compressor motor meets Underwriters Laboratories (“UL”) standards, which are the most stringent in the industry.  It relates to HVACR and it should not be confused with Full Load Amps (FLA).

You should look for the RLA value on the air conditioning tag. The RLA value isn’t the AC’s normal running current. The maximum current drawn by the compressor motor during operation is the maximum current the compressor motor will pull while the AC is running.

Furthermore, this isn’t the same as the LRA value, which is Locked Rotor Amps. If the compressor is pulling maximum current, there could be a problem. This voltage is the same as inrush or surges current when the compressor motor starts from a standstill.

AC Surge Current

An AC motor operates, it pulls many times more current than when it runs continuously. The surge current is the highest amp the motor pulls unless the motor is locked solid and can’t move at all (this is very bad). The inrush current is the amp drawn for starting the motor.

The amount of wire required is based on the size of the wiring plus ten percent. Most surge currents only last for a few seconds, and the heating effect on the wires isn’t significant. Therefore, fuse or breaker ratings need to be properly sized according to what you are using them for so that they do not fail under this surge.

For any solar-powered AC, this will have important implications for its design and construction. The right solar panel size depends on how much the battery bank is able to supply reserved energy to the solar panels’ wattage rating for this motor surge current.

Solar panel systems designed to run your appliances make use of a device called an inverter to change the direct current voltage from solar panels into alternating current power for use in your home.

How Many Solar Panels To Power AC?

How many solar panels you need is determined by how much electricity your air conditioning requires.  To determine how many panels are needed for your application, consider an average of 1 to 5 panels for 100 watts.

It’s difficult to select the right size of solar panel because a small panel is only good for generating a low wattage and a big panel When selecting solar panels, for example, if you choose a solar panel between 250 and 400 watts, one solar panel is enough to run 100 watts.

However, if they are not strong 100-watt panels, you may need more than three to five panels to run 100 watts.

Effect Of On-Grid System Or An Off-Grid System?

There are two types of renewable energy systems: one is on-grid or grid-tied, and the other is off-grid. Both have their advantages.

In a grid-tied system, you’ll hook up your home to the main electrical grid so that you can get your energy from the utility company. This means that you can take power-efficient shots even if you need to use power-saving features to use it when there is no sun.


An off-grid system uses solar panels instead of relying on the utility meter to create electricity. If you require more power to keep the air conditioning running, the inverter is going to convert DC from the solar battery bank into ac.  The battery bank stores extra energy from solar PV to use later.

If you have an off-grid solar panel system and use that much electricity, you’ll likely need a generator to be able to use your panels as much as you want to do.

Why Use Solar Energy To Power AC?

To cool the air and release moisture in your home, air conditioners and HVAC systems use cooling and recirculation to allow hot air and moisture to be released outside. Solar air conditioners work similarly, and when you buy one, you’ll not be spending more on electricity in the summertime.

Homes with AC cost on average 12% of their energy costs, ranging from 5% in very cold climates to 27% in hot-humid climates in the US according to the US Energy Information Administration (“EIA”). A residential cooling system can be used to lower the temperature of a room or a house. Central air conditioning is used to cool the whole house, and a standalone AC unit is used for smaller spaces.

In 2015, more than 60% of U.S. households used central air conditioning units, while approximately 23% used AC units alone. About five percent of households used both a central air conditioner and a supplementary AC unit according to EIA.

Air conditioner systems cost more than $29 billion every year. This Department of Energy, what’s more, is saying that AC units and systems are responsible for about 117 million metric tons of carbon dioxide being released into the atmosphere each year. If you live in a hot region, you’ll want to consider switching to an air conditioning unit that’s better for the environment.

Solar ACs are a good option for homeowners who don’t need a full solar panel installation, such as people with small roofs, who live in condos, or who want RV cooling. Homeowners with the cash to do so may want to consider installing a whole-home solar AC system. It will provide the best energy savings and most likely also provide a better return on investment than just putting in an individual AC unit.


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