How Long Does An Air Conditioner Run On A Battery? See How To Calculate And Avoid High Electricity Bills This Summer

Written by Bruno Teles

Published on 18/01/2024 at 18:53

Foto: Divulgação

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With High Temperatures In Brazil, The Use Of Air Conditioning Has Become Essential For Daily Comfort. A Frequent Question Arises: Is It Possible To Keep An Air Conditioner Running Solely With A Battery? And For How Long? This Article Offers A Detailed Analysis Of The Operating Time Of An Air Conditioner Connected To A Battery.

The First Step To Determine The Autonomy Of An Air Conditioner Connected To A Battery Involves Calculating The Daily Consumption Of The Equipment. For A 9000 BTU Model, Considering 1 Hour Of Use Per Day, The Monthly Consumption Is 17.1 kWh. Dividing This Value By 30 Days, We Have A Daily Consumption Of Approximately 0.57 kWh, Or 570 Watts Per Day.

The Next Step Is To Consider The Inverter Efficiency, Which In This Case, Has Been Conservatively Estimated At 85%. This Means That To Provide The 570 Watts Necessary For The Air Conditioner, The Battery Needs To Offer Approximately 671 Watts.

Lead Acid Battery

The Battery Chosen For This Analysis Is The Moura 12 MS 274, With A C20 Discharge Capacity Of 220 Ah. When Calculating The Stored Energy Considering The 30% Depth Of Discharge And The Battery Efficiency Of 85%, We Reach A Total Of 570.4 Wh Available For Use.

ARTICLE CONTINUES BELOW

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Paulo Nogueira

When Relating The Energy Necessary To Operate The Air Conditioner For One Hour (571 Wh) With The Energy Stored In The Battery (570.4 Wh), It Concludes That The Battery Can Keep The Air Conditioner Running For Approximately 46 Minutes. This Calculation Is Based On The Premise Of Keeping The Battery Depth Of Discharge At 30% To Preserve Its Lifespan.

Theoretical Estimate

In Practice, For A Complete Off-Grid System, Other Factors Such As Losses In Equipment, The Peak Power Of Devices, And The Choice Of Controllers And Solar Panels Must Be Taken Into Consideration.

This Study Provides An Overview Of The Viability Of Using A Battery To Operate An Air Conditioner, Offering An Initial Understanding For Those Interested In Alternative Energy Solutions. The Discussion Remains Open, And We Invite Readers To Share Their Opinions And Experiences In The Comments.

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How Long Does An Air Conditioner Run On A Battery? See How To Calculate And Avoid High Electricity Bills This Summer

Lead Acid Battery

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