5 star Geysers are generally the power saving storage water heater available in India. The star ratings of water heater geyser is dependent on standing loss of water geyser. Which means the amount of heat lost by storage water heater. So the star rating is more dependent on how long it can store the water hot in the inner tank of storage water. So insulation plays a bigger role in deciding the star ratings. So if you are a person who don’t let the hot water store inside for long or mostly use it immediately then this star rating will play a marginal role in your water power savings.

You should use higher energy star rated water geyser for bigger tank capacity storage geyser. Like for 25liters a 5 star rated is a must. For 10-15liters you can decide between 4-5star depending on price. For 6-10liters 3-4star is enough. It all depends on how long you keep hot water and how hot you set the water geyser temperature to.

Bajaj Shield Series New Shakti 15L Storage Wall Mount Water Heater For Home|5-Star Rated Geyser|Child Safety Mode|For High Rise Buildings|10-Yr Tank 6-Yr Element 4-Yr Product Warranty 【White & Grey】
  • ✅ Free Installation and Free Inlet pipes worth Rs.600 by brand.
  • ✅ DuraAceTM tank with Marine grade glassline coating, DuraCoatTM Non-Stick Heating Element, DuraNteTM Thermostat and VoltageProTM – it can wiithstands 45KW Surge Voltage
  • ✅ 10 Year Tank Warranty, 6 Year Heating Element Warranty & 4 Year Product Warranty by Bajaj
  • ✅ Bajaj Shield Series New Shakti has an Unique weld free joint technology for outer body and Pre coated metal body
  • ✅ The product comes with Swirlflow Technology – 20% more hot water
V-Guard Divino Geyser 15 Litre Wall Mount Water Heater For Home|5 Star Rating|Vitreous Enamel Tank Coating|Advanced Multi-Layered Safety|Suitable For Hard Water&High-Rise Buildings|White
  • 【15 LITRE】Storage Water Heater; 【BEE 5 STAR RATED】: Highly Energy Efficient with Extra Thick & High Density CFC Free PUF Insulation for Maximum Heat Retention;【COUNTRY OF ORIGIN】: India
  • 【ANTI-CORROSIVE & SUITABLE FOR HARD WATER USAGE】: Advanced Vitreous Enamel Coating protects the Inner Tank, Superior Incoloy 800 Heating Element ensures Sustained Performance, Extra Thick Magnesium Anode provides Added Protection 
  • 【66% REDUCTION IN LEAKAGE】: Single Weld Line High Grade Mild Steel Tank
  • 【SAFETY ASSURED】: Advanced Thermostat & Thermal Cut-out Mechanism for Dual Overheat Protection; 5-in-1 Multi-function Safety Valve prevents excessive Pressure Build-up, Vacuum Formation & Reverse Water Flow
  • 【HYGIENIC & PUNGENT-FREE WATER】: Multi-layer protection against Corrosion & Scaling
Orient Electric Enamour Classic Pro Geyser|25L Storage Water Heater| High Pressure Epoxy Coated Tank|5 Star rated |8 bar pressure compatibility |Suitable for high rise buildings |5 years tank warranty
  • STYLISH & SOPHISTICATED DESIGN: This orient geyser comes with a pre-coated metal body and stylish design to complement your interiors.
  • SHOCK-PROOF & SPLASH-PROOF IPX2 PROTECTED BODY: This water heater comes with an IPX2 protected, high-strength Polymer body that is shock-proof and splash-proof for an ultra-safe usage.
  • ENHANCED SAFETY WITH MULTIFUNCTION VALVE: The 25 litre geyser comes with a multifunction valve for enhanced safety, as well as a moulded 3-pin plug for better load efficiency.
  • GOOD CORROSION RESISTANCE & EXTENDED LIFE: With Nickel-coated heavy Copper heating element, this water heater is corrosion resistant and durable.
  • 20% MORE HOT WATER OUTPUT WITH WHIRLFLOW TECHNOLOGY: Equipped with the cutting-edge Whirlflow technology, this orient geyser yields 20% more hot water by minimizing the direct mixing of hot and cold water.
AO Smith Geyser 15 Litre 5 Star BEE Rating | 2KW | Storage Water Heater With 2X Corrosion Resistant Blue Diamond Glass Tank | Warranty: 7 Yr Tank, 3 Yr heating element & 2 Yr Overall | VAS PLUS 15L
  • DOUBLE PROTECTION FOR SAFETY: Enjoy ultimate peace of mind with this AO Smith 15-litre water geyser. It features a factory-set thermostat, multi-function safety valve, and thermal cut-out, ensuring safe and reliable hot water for your bathroom every day.
  • DURABLE & ELEGANT DESIGN: This AO Smith 15-liter water geyser is crafted with a glossy ABS plastic body and blue diamond glass-lined tank for 2X corrosion resistance, making it the best 15L storage water heater for style and durability.
  • ENERGY-EFFICIENT 5-STAR GEYSER: Save on electricity bills with this BEE 5-star rated 15-litre geyser. Perfect for eco-conscious homes, this water heater ensures efficient heating while reducing energy consumption, making it a top choice in India.
  • BUILT FOR HIGH-PRESSURE USE: This AO Smith 15-liter storage water geyser can handle up to 8 bars of pressure, making it ideal for high-rise apartments or hard water areas. Enjoy uninterrupted hot showers without compromising performance.
  • LONG-LASTING WARRANTY COVERAGE: With a 7 year warranty by AO Smith on the inner tank, 3 year warranty on the heating element and 2 years comprehensive warranty by AO Smith, this AO Smith 15 litre water heater offers unparalleled after-sales support for peace of mind.
Havells All New Adonia Spin 25L 5 Star Storage Water Heater(Geyser)|Faster Heating|Safe to use|Saves electricity|Feroglas Coated Anti Rust Tank| Temp. setting knob|7 Yr. Tank Warranty| Made In India
  • Type: Storage Capacity 25 Litres Wattage 2000 Watts Pressure 8 bar BEE Rating 5 Star
  • Feroglas Coated Inner Container: This thick rolled steel tank is coated with feroglas which ensures high resistance against corrosion, making the water heater tough on hard water & giving them a longer life.
  • Incoloy Glass Coated Heating Element: It offers faster heating & superior performance with its excellent resistance to corrosion against hard water conditions, thus extending life span of heating element.
  • High working pressure 0.8MPa: Suitable for high rise buildings. The multi-function valve prevents pressure to increase beyond 8 bar
  • Temperature setting knob: The temperature setting knob lets users adjust temperature to their comfort level, ensuring personalized warmth and energy-efficient usage.
Racold Buono Pro NXG 15L ABS Body 5 Star Water Heater (Geyser) – 7 Yrs Tank Warranty, Corrosion Prevention With Superior Titanium Enameled Tank Coating, Suitable for Buildings, for elegant aesthetics
  • TITANIUM PLUS TECHNOLOGY: Titanium enamel coating in the tank prevents corrosion by handling toughest water conditions, providing reliable and healthy water for years.
  • PUF INSULATION: An eco-friendly insulation that retains hot water longer, saving energy.
  • MAGNESIUM ANODE: The water heater features a bigger anode that prevents corrosion of the inner tank, extending its lifespan
  • RUST PROOF BODY: Prevents corrosion, eliminating any chance of rust and ensuring a longer lifespan.
  • SAFETY PLUS: This storage water geyser features enhanced protection with 3 layers of safety with a thermostat, cutout, and safety valve for a worry-free bathing experience .
POLYCAB Celestia Prime 5-Star 10 Litre Water Heater (Geyser) | Free Connecting Pipe | 5-Year Tank Warranty by POLYCAB | Temperature Control Knob | Faster Heating, Shock Resistant【White】
  • ✅【5 Star Energy Rating】POLYCAB Celestia Prime is an energy-efficient water heater with a 5-Star BEE rating by Govt of India, helping you save significantly on electricity bills.
  • ✅【Additional 7 Layer Safety】 Multi-Functional Valve Temperature control knob Advanced Thermal Cut-off Shock-resistant, and IPX4 splash-resistant design Whirl Flow Technology PUF Insulation High Strength FBP (Fiber-reinforced) Coating Tank for Corrosion resistance
  • ✅【 Coverage】Enjoy peace of mind with 2 Years Product Warranty, 2 Years Heating Element Warranty, and 5 Years Tank Warranty for long-lasting performance.
  • ✅【Free Connecting Pipe】 Free Connecting Pipe worth ₹300 included. Benefit from our All India Service Center network for seamless support and service nationwide.
  • ✅【Durable Engineered Plastic Body】POLYCAB water heaters feature a rust-proof engineered plastic body, delivering long-lasting durability and reliable performance over time.
AO Smith Geyser 25 Litre 5 Star Rating (BEE), Vertical Water Heater | Geyser 25 Ltr For High Rise Building | 7 Year Tank Warranty, 2 Year Comprehensive Warranty | SDS-GREEN-025
  • Blue Diamond Glass-Lined Tank for 2X corrosion resistance
  • Long-lasting Anode Rod a customised alloy that works even in hard water conditions to protect the tank and has 2X lifespan as compared to normal magnesium rod.
  • Installation: Water Heater Free Installation is applicable up to municipal city limit of Bangalore, Chennai, Hyderabad, Secunderabad, Pune – PCMC, Delhi, Noida, Faridabad, Ghaziabad, Gurgaon, Kolkata, Howrah and Hooghly. Free Installation does not include any additional material e.g. connecting hoses, water inlet & outlet, pipe nipples, any additional material, electrical fittings & Demounting* of old geyser etc. In rest of the cities, installation will be provided by the brand against the installation charge of INR 400
  • Inner Tank Material: Blue Diamond Glass Lined Tank- 2X Corrosion Resistance; Outer Body Material: ABS, Temperature Control Knob Easy temperature settings
  • Glass-Coated Heating Element to prevent scale formation and extend the life of heating element

Do remember you can yourself insulate water heater too as properly insulating the tank of your electric water heater can help reduce heat loss. You can insulate the tank with a water heater blanket or jacket, and insulate hot water pipes to prevent heat loss while water travels from the tank to the faucets.