Most inverter batteries are sold based on Ah rating. However, Ah only reflects stored capacity. It does not define how long your appliances will run during a power cut.
Actual backup depends on engineering factors such as battery design, plate construction, and discharge efficiency. Two batteries with the same Ah rating can deliver different runtime. When buying a battery, do not rely on verbal estimates. Check the Certified Backup Hours printed on the packaging and compare before you decide. Measurement builds confidence. Assumptions do not. With Okaya, you can see Certified Backup Hours at defined load conditions, so you know exactly what to expect.
Certified Backup Hours represent the actual runtime of a battery under defined load conditions.
Each CBH value is:
If it is printed, it is proven.
Setting the standards for Test conditions:
Important Considerations for Battery Performance and Backup:
CBH (Certified Backup Hours) is Okaya's independently verified backup declaration that shows the actual tested runtime of an inverter battery under defined load conditions. The values are verified by NABL-accredited independent laboratories and printed on the battery packaging. While an Ah (Ampere Hour) rating only indicates the battery's stored capacity, CBH tells you how long the battery will actually provide backup under specific loads. This removes guesswork and allows buyers to compare batteries using certified runtime instead of estimated performance.
Okaya CBH is tested under the UMHD (Urban Metro Heavy Duty) protocol, developed to reflect typical Indian household usage. Standardized test conditions include constant current charging until TOC is ≥15.5V, OCV between 12.50V and 12.70V, electrolyte specific gravity of 1.25–1.26, ambient temperature of 27 ±2°C, and a discharge cut-off voltage of 10.5V. These tests are conducted by NABL-accredited independent laboratories, ensuring unbiased and reliable backup hour certification.
CBH provides a dependable benchmark because it is measured under standardized laboratory conditions. Actual backup at home may vary depending on factors such as the total wattage of connected appliances, ambient temperature, battery age, charging method, and the battery's State of Charge (SOC). New batteries usually require three complete charge-discharge cycles to achieve their rated CBH performance. While real-world runtime may differ slightly, CBH remains a verified reference point for comparing battery performance.
NABL (National Accreditation Board for Testing and Calibration Laboratories) is India's government-recognized accreditation body that certifies laboratories for technical competence, accuracy, and impartiality. Okaya's CBH values are verified by NABL-accredited independent laboratories, rather than being self-tested. This ensures the backup hours printed on every Okaya battery are validated by a neutral third party under standardized testing conditions, providing greater transparency and confidence for buyers.
Okaya CBH values are published for specific load levels such as 100W, 200W, 300W, and 400W. To estimate your expected backup, calculate the total wattage of the appliances you plan to use during a power cut—for example, two 60W fans plus four 10W LED lights equals 160W. Then compare this with the nearest load value in the CBH table printed on the battery packaging. Lower connected loads provide longer backup, while higher loads reduce runtime, allowing you to make an informed comparison across different Okaya battery models.
The complete Okaya XBD+ inverter battery range—including both SJT (Super Jumbo Tubular) and Tall Tubular (TT) models from 90Ah to 310Ah—features CBH (Certified Backup Hours) printed on the packaging. Okaya is India's first inverter battery brand to declare independently verified backup hours tested by NABL-accredited laboratories under the UMHD protocol. Unlike conventional battery brands that generally rely on estimated or self-declared backup claims, Okaya provides standardized third-party verification. To explore the complete XBD+ range, visit okaya.in or send "Hi" to +91 9818909090 on WhatsApp.
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