Solar Air Conditioner

The moment an air conditioner is added to the list of appliances used in a household, the electricity bills increase significantly. Although it is difficult to significantly reduce the “big” impact of an air conditioner on your electricity bills, but still some of it can be managed by choosing the right technology. Solar Air Conditioner (technology MGM Compressor) is the latest and the most efficient technology. This Technology is based on Magnetic Vibrate Technology. These Air conditioners are designed in such way that it can save 70 – 80 % of electricity (Units Consumed) over a regular air conditioner.

How does Air Conditioner Works?

For most people, air conditioner just throws cool air at the temperature one sets it at. But does it really work that way? In fact air conditioner during cooling process, takes the indoor air, cools it by passing it through evaporator and throws it back in the room. It is quite opposite to how our good old air coolers used to work. Air coolers used to take outside air, cool it with water and throw it in. But air conditioners just work on internal air. Along with evaporator air conditioner also has a compressor that compresses the gas (refrigerant) in the AC to cool it that in turn cools the incoming internal air from the room.

In a regular air conditioner:

The compressor is either off or on. When it is on, it works at full capacity and consumes full electricity it is designed to consume. When the thermostat reaches the temperature level set in the AC, the compressor stops and the fan (in AC) continues to operate. When the thermostat senses that the temperature has increased, the compressor starts again.

What is solar Air Conditioner?

Solar air conditioning refers to an air conditioning (cooling) system that uses solar power as a primary energy source by converting solar energy to electricity. This makes the system very energy efficient and cost effective. Solar AC works on a hybrid system which combines photovoltaic technology (PV) with direct current (DC). It automatically switches between solar and battery power as per need. In hybrid, this system charges its batteries when the sun is shining and when it isn’t, the system runs on battery backup while charging its batteries by alternating current (AC) power.

This solar air conditioner also works like a conventional air conditioner with some key differences, i.e. the existing or conventional AC uses only Grid-Electricity and takes a comparatively high wattage to run but, the Solar AC has been designed in such a way that it takes a very low wattage. Also, Solar air conditioner” has three connectivity options:

  • Solar PV Power,
  • Battery Power Bank,
  • Electricity Grid (DISCOM)

Solar AC with the MGM Technology (Compressor) works like an accelerator in a car. When compressor needs more power, it gives it more power. When it needs less power, it gives less power. With this technology, the compressor is always being on, but draws less power or more power depending on the temperature of the incoming air and the cooling level set in the thermostat. The speed and power of the compressor is adjusted appropriately. This technology is currently available only in split type of air conditioner.

What is benefit of Solar Air Conditioner?

This air conditioner will run continuously but will draw only that much power which is required to keep the temperature stable at the desired cooling level. So, it may automatically adjust its capacity based on the requirement of the space or room, it is cooling. Thus, it draws much less power and hence consuming lesser units of electricity.

Features of Solar air conditioner:

Solar AC is a very effective solution for those locations where climate is hot & humid and grid based electricity is scarce and not enough due to frequent power cuts. Solar AC is designed to address these kind of regular and frequent problems found in almost all the major parts of India. Solar AC runs on different alternative energy sources i.e. when it is working on solar PV it saves and reduces Grid electricity demand, it is also very power efficient and saves major electricity expenses of the customer. Solar ac is very environment friendly as it reduces grid power consumption up to 100% because the grid power is being generated by Fossil fuel, whereas solar system reduces the grid power demand and hence as a result, it does lesser carbon emission into the atmosphere.

  • 1. Can work without electricity
  • 2. Work on both, solar power and Grid-electricity
  • 3. Solar air conditioner is of Low maintenance
  • 4. Zero Electricity Bill and saves 100% on bills

Difference between regular air conditioner and solar air conditioner

1. Solar air conditioners are variable speed/ variable tonnage air conditioners and thus operationally they are quite different from regular air conditioners that have single speed compressors and single tonnage.

2. Solar air conditioners adjust their speed/tonnage depending on heat load of a room. Whereas regular air conditioners don’t.

3. Solar Air conditioner doesn’t have Jerk load while power on AC whereas regular air conditioners have a huge jerk load.

4. Solar air conditioner compressors are equipped with MGM Technology whereas regular air conditioners are with rotary and thermostat technology.

5. Solar Air Conditioners will take power (AMP) according to the ampere of a threshold voltage, whereas regular AC will take AMP according to their compressor power consumption.

6. Solar AC consumes less electricity and saves up to 80% electricity whereas regular AC consumes higher electricity.

Power Consumption of Solar air conditioners and regular air conditioners

Based on data from BEE in 2018, below is the representative (median) sample of power consumption of Air Conditioners of various tonnage and star ratings:

Annual Electricity Consumption (Unit for 1600Hrs) based on data from BEE

Is Solar air conditioner slow in cooling?

Many people have raised their concerns that Solar air conditioners do not cool well or cool slowly. However, let us go through the following illustrative image as a reference to understand the very working of Solar AC:

Regular and traditional ACs are of fixed speed ACs, where as Solar ACs are of variable speed ACs. Regular AC has compressor that go "On" and "Off". Whereas Solar ACs have DC compressors that got remain "On" all the time. As regular AC is of bigger size for peaking summer heat load; that is over-sized all the times (in fact most of the time people do oversize even for peak summer season). The drawback of the same is that the AC "Over cools" most of the time! So, if you set your AC at a temperature of ْ 25 c, it will cool down up to ْ 23 c or ْ 22 c. Now, one would question that what is the use of thermostat? Well, the thermostat (in a regular AC) switches off the compressor when the outside temperature has reached 25. But a lot has happened before that. In an AC, refrigerant moves from liquid to gas (by taking heat from the room) and then back from gas to liquid as the compressor compresses it. But, if the refrigerant is more and heat in the room is less (which generally happens in over sized AC), it does not get enough heat from the room to convert from liquid to gas and it keeps moving as liquid only. Now, when the thermostat detects temperature and switches off the compressor, the refrigerant still remains in liquid state and thus has capacity to take heat from room to convert to gas. So, it takes more heat from the room and cools the room below the set temperature level !

In comparison, the Solar AC (MGM compressor technology) changes the flow rate of refrigerant based on the heat of the room. When heat is less, the flow rate is less, when heat is more, the flow rate is more. And it does not switch off the compressor, ever. It just makes sure that if temperature setting is ْ 25 c, it is being maintained at that very level, only.

Technical Specifications

Sr. No. Particulars Model_1x Model_2x
1 Cooling Capacity BTU 3,000/ 16,000 4,000/ 21,760
2 Capacity (Ton) 1.5 2.0
3 Starting Current Ampere 0.5 0.5
4 Running Current Ampere 0.8 (min.), 4.5 (max.) 1.0 (min.), 6.5 (max.)
5 Air Flow 580 960
6 Refrigerant R410/ R32 R410/ R32
7 Unit Consumption (per hour) 0.5 0.7
8 Compressor BLDC BLDC
9 Electricity Saving (in comparison to other AC) Up to 80% Up to 80%
10 Power Input 130 - 280 130 - 280
11 Sound Level: H/M/L 38/34/31 38/34/31
12 Indoor Unit’ Dimension 850*300*198 970*315*235
13 Net Weight 11/ 13 Kgs 13.6 / 16.0 Kgs
14 Out Door Unit’ Dimension 730*285*545 800*315*545
15 Net Weight 25.5 / 29.5 Kgs 32.5 / 36.6 Kgs
16 Sound Pressure Level 45 dBA 45 dBA
17 Power Source Rating MCB 6A 6A
18 Interconnection Wires 4 core 4 core
19 Power Supply Indoor Indoor
20 Ref. Max. Piping Length r 15 M r 15 M
21 Liquid Tube Diameter Ө 6 mm Ө 6 mm
22 Gas Pipe Diameter Ө 12 mm Ө 12 mm
Solar Compatibility
23 Solar PV Modules 1500 watts 2000 watts
24 VOC 180v – 280v 180v – 280v
25 Panels Configuration 300 WP*5 300WP*7