Experience Unmatched Solar Power Storage with the Okaya Solar Battery ST 040S
When it comes to reliable solar energy storage, the Okaya Solar Battery ST 040S stands out. This tubular battery, boasting a rated capacity of 40Ah @ C10 and 60-month warranty, is your key to uninterrupted power.
Invest in the future of energy storage with the Okaya Solar Battery ST 040S. Whether you're looking to power your solar applications at home sustainably, ensure business continuity during outages, or explore off-grid adventures, this battery is your trusted partner in energy independence. With outstanding reliability and performance, it's time to embrace the power of the sun with confidence.
Order your Okaya Solar Battery today and step into a brighter, more sustainable future. Power your world with Okaya!
• Designed cycle life at C10 discharge (at 27° C, 1.80 VPC)
• Ultra low-maintenance due to low antimony content
• Excellent Ampere-hour and Watt-hour efficiency
• Ultra low-rate of self discharge
• Designed to operate in partial state of charge condition
• Efficient in hybrid applications
• 6 Ceramic water level indicators for each vent hole
• Pressure Die cast terminals, free from voids for high strength
• Highly efficient PE Envelope Separator from DARAMIC, USA
• Superior Voltage - Ideal for cyclic applications due to superior voltage and energy output profile
• Capacity @C10: 40Ah
• Dimensions: Length*Width*Total Height = 407 * 176 * 245 mm (±2 mm)
• Net weight: 23.50 kg (±3%)
• Warranty: 60 months
• Back up at 100W: ≥ 3 hrs : 30 mins.
Both deliver identical backup performance (≥3 hours 30 minutes at 100W) and the same 40Ah capacity, so the decision comes down to how much you value the extra 24 months of warranty coverage relative to the roughly ₹1,000 price difference — for many households, the longer protection period is worth the modest premium.
At 23.5kg versus the 040H's 22kg, the slightly heavier build typically reflects additional plate material or construction reinforcement that supports the longer 60-month warranty period — more robust internals built to remain reliable over the extended coverage window.
Service life depends heavily on usage patterns, charging discipline, and maintenance, but the ATT (Advanced Tubular Technology) design is specifically built for daily cyclic discharge — the kind of repeated charge-discharge pattern solar systems create — rather than occasional backup use.
It's not recommended. Mixing batteries of different ages, capacities, or wear levels in the same bank can cause uneven charging and reduce the lifespan of both batteries — if you're expanding capacity, matching battery age and specification within the same bank gives more reliable, predictable performance.
Beyond checking and topping up water levels using the 6 ceramic indicators, keep terminals clean and tight, ensure the battery sits in a well-ventilated area, and avoid letting it sit in a deep-discharged state for extended periods — the low-antimony design already minimizes water loss compared to older battery designs.
It covers manufacturing defects under normal use for 60 months. Damage from improper installation, using tap water instead of distilled water, or chronic deep discharge typically falls outside standard coverage — confirm the exact terms and any registration steps with your dealer or Okaya Customer Care.
At OKAYA, we offer a wide range of power solutions for various applications. Take a look today!
OKAYA POWER PVT. LTD.
ENERGIS D-7, 3rd & 4th Floor, Rohtak Rd,
Udyog Nagar, Mangolpuri,
New Delhi - 110041, INDIA
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