Load Calculator
Tell us what you want to run during a power cut. We'll size the exact Eastman Home UPS and battery bank for the backup you expect.
Calculate Your Load
Pick your appliancesChoose what needs to stay on, across five appliance categories
Set backup hours & preferencesFrom 1 to 12 hours, with waveform and battery type.
Get your recommendationYour load, VA required and a matched Eastman setup.
Size your Home UPS and battery
Add the appliances you want running during an outage, set your backup duration, and we'll estimate your load and recommend a matched Eastman solution.
Select Your Appliances
Tap + to add the quantity you run during a power cut
Backup Your Need
Duration, waveform and battery preference
FAQs
1. What is the Eastman Load Calculator?
The Eastman Load Calculator is an easy-to-use tool that helps you estimate your home’s power backup requirement. Based on the appliances you want to run and your desired backup duration, it helps you identify a suitable Eastman Home UPS and battery solution.
How do I use the Eastman Load Calculator?
Select your appliances, choose backup hours and preferences, then review the calculated recommendation.
What appliances can I add to the calculator?
You can include common lighting, fans, kitchen, entertainment, cooling and utility appliances.
How does the calculator determine my power requirement?
It totals the wattage of each selected appliance and adds a practical operating margin.
How much backup time can I select?
You can choose between 1 and 12 hours.
What is the difference between Sine Wave and Square Wave Home UPS?
Sine wave output is best for sensitive electronics, while square wave systems suit basic everyday loads.
Which battery type can I choose?
Choose between tubular and lithium batteries.
Should I choose a Tubular or Lithium battery?
Tubular batteries offer dependable value; lithium batteries are lighter, faster charging and maintenance-free.
What does “Your Load” mean?
Your Load is the combined wattage of the appliances you selected.
What does “VA Required” mean?
VA Required is the inverter capacity recommended after applying the operating margin.
Why is the number of backup hours important?
Longer backup duration requires greater battery storage capacity.