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.

Crompton Arno Neo 15-L 5 Star Rated Storage Water Heater (Geyser) with Advanced 3 Level Safety, National Energy Conservation Award Winner 2023
  • PRODUCT: Crompton’s energy efficient storage water heater with fast heating
  • TECHNICAL SPECIFICATIONS: Wattage: 2000 W; Capacity: 15L; Star Rating 5; Pressure 8 bar
  • 3 LEVEL SAFETY: Capillary Thermostat, automatic thermal cut-out & multi-functional valve to provide higher safety
  • ANTI-RUST: Fitted with specially designed magnesium anode which prevents corrosion due to hard water quality
  • QUALITY COMPONENTS: ISI marked nickel coated special element to provide resistance against scale formation
Bajaj Shield Series New Shakti 25L Vertical Storage Water Heater For Home| 5-Star Rated Geyser| Multiple Safety Systems| For High Rise Buildings| 10-Yr Tank 6-Yr Element 4-Yr Product Warranty| White
  • TYPE: Storage Water Heater/Water Geyser, Capacity: 10 Litres, Wattage: 2000 Watts The rated voltage is 230 volts, and the frequency is 50 Hz
  • WARRANTY: 10 Year Tank Warranty, 6 Year Heating Element Warranty & 4 Year Product Warranty by Bajaj
  • BUILD TO LAST with GLASSLINE INNER TANK, TITANIUM ARMOUR TECHNOLOGY & MAGNESIUM ANODE for zero erosion: These technologies prevent corrosion & rusting of the geyser inner tank and helps to fight hard water Results in long tank life
  • TEMPERATURE CONTROL – Set the temperature of water as desired with the help of Adjustable Thermostat knob
  • ENERGY EFFICIENT with SWIRL FLOW TECHNOLOGY – ENSURES 20% MORE HOT WATER; PUF INSULATION – Traps the heat inside the tank, to keep water hot for longer period, thanks to the Polyurethane foam inserted between the outer and inner shells of water geyser body
Longway Superb 15 Ltr 5 Star Rated Automatic Storage Water Heater for Home, Water Geyser, Water Heater, Electric Geyser with Multiple Safety System & Anti-Rust Coating (Gray, 15 Ltr)
  • Type: Storage, Capacity: 15 Liters, Wattage: 2000 Watts, Pressure: 8 Bars, BEE Rating: 5 Star Rated Energy Efficient Geyser, Inner Tank Material: Stainless Steel (SS) Tank with special Anti-Rust coating – 2X Corrosion Resistance, Outer Body Material: Metal (CRCA).
  • Highest Saving: BEE 5-star rated with Advanced heat resistant Technology for Power Savings. Perfect if you want to go green. Quality check: 5 safety functions and 15 Quality checks by a team of professionals to ensure the best product for you. Extra heavy duty element for extra heating & durability.
  • Product Features: Superior polymer coated tank, nano poly bond technology for excellent corrosion resistance and oxidation resistance even in high temperature and pressure 100% ISI Marked & BIS approved Copper Heating Element to ensure powerful heating.
  • Package Content: Electric Geyser, Instruction Manual.
  • Warranty Period: 1 Year Limited Domestic Brand Warranty on Product & 5 Years on Inner Tank/Container. Enjoy the hassle free warranty by Longway on your product.
V-Guard Zio Instant Geyser 5 Ltr Wall Mount Water Heater|Advanced Multi-Layered Safety|3000 W Powerful Heating|Strong Stainless Steel Tank|Suitable For Kitchen&Bathroom|White-Blue
  • POWERFUL INSTANT HEATING: V-Guard Zio 5 Litre is powered by a superior 3 kW heating element with a copper sheath and high-grade magnesium oxide insulation for quick movement of heat
  • ADVANCED 4 LAYER SAFETY: Pressure release valve for safer operations at higher pressures, ISI marked thermostat for cutting off power supply when temperature exceeds 55°C, Overheating protection through disc type snap action safety device operating at 90°C & Anti-siphon Protection for preventing the reverse flow of water
  • STYLISH & ENERGY EFFICIENT : This Instant Water Heater maintains maximum heat retention with eco-friendly insulation and has an stylish colour display panel indicating the status of heat and power
  • HIGH DURABILITY: Robust Inner Tank of Zio is made of high-grade 304 Stainless Steel | Rust-proof high-quality engineering polymer constitutes the Outer Body, preventing rust formation
  • WARRANTY: V-Guard Zio has a warranty of 2 Year on Product, 2 Year on Heating Element and 5 Year on Inner Tank
Longway Vesta 5.5 Ltr 5 Star Rated Instant Water Heater for Home with Advanced Multi-Layered Safety System & Anti-Rust Coating |Suitable for Kitchen & Bathroom | 5 Year Warranty (Gray, 5.5 Ltr)
  • DURABLE STAINLESS-STEEL TANK FOR EXTENDED LIFESPAN: Built with high-grade stainless steel, this water heater offers long-lasting durability, ensuring endless hot water supply. Its heavy-duty copper heating element ensures rapid heating, providing hot water whenever you need it.
  • ENHANCED SAFETY FEATURES: This water heater features a robust polymer body that is both shock-proof and rust-resistant, ensuring long-lasting durability and safety and designed to withstand pressures up to 8 bars, this instant geyser is ideal for use in both low-rise and mid-rise buildings.
  • SUPERIOR HEAT RETENTION: Featuring premium Glass Wool Insulation, this water heater retains heat for longer periods, so you can enjoy hot water whenever needed.
  • USER-FRIENDLY WITH NEON INDICATORS: This water heater comes with convenient neon indicators to show power and heating status, and it includes a moulded 3-pin plug for optimal load efficiency.
  • WARRANTY PERIOD: 1 Year Limited Domestic Brand Warranty on Product & 5 Years on Inner Tank/Container. Enjoy the hassle free warranty by Longway on your product.
IMPERIAL GOLD 25-L Storage Water Heater (Geyser) For Home | 5 Star Rated | Multiple Safety System | Instantly Heat Water | Anti Rust Tank | ISI Copper Element 2Kw | 2 Years Warranty | Ivory Colour
  • ✅This Geyser Comes With Multiple Temperature Controller Which Lets You Control The Level Of Heat According To Your Comfort And As Per Your Seasonal Requirement.
  • ✅The 2000 Watt High Quality Extra Thick Heating Element Material Ensure Fast Heating Of Water And Provides The Perfect Hot Water And Provides The Perfect Hot Water Anytime Of the day
  • ✅Magnesium Anode Rod Sacrifices Itself, Acting As An Additional Layer Of Protection Against Corrosion And Further Prolongs The Water Heater Life
  • ✅The Geyser Comes With Seven Tank Processed Sheet Metal Powder Coated Body. The Seven Tank Processed Geyser Body Saves Your Geyser From Rust and Corrosion
  • ✅Enjoy uninterrupted hot water supply with this 25-liter instant geyser, perfect for quick showers and daily needs.
Havells Instanio 3L Instant Water Heater(Geyser)| Temp. Sensing LED Indicator| Rust & Shock Proof Body| ISI Marked|With Flexible Pipes|Warranty: 5 year on Inner Tank| High Rise Compatible (White Blue)
  • LED Indicator: Colour-changing LEDs that change from blue to amber to indicate the hotness of the water
  • Outer Body: Rust and shock proof ABS outer body for long life
  • Inner Tank: Stainless steel inner tank of 304 grade
  • Power Cord: Fire retardant power cord for maximum safety
  • 0.65 MPa Bar Pressure: Suitable for high rise buildings and pressure pump applications
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
Racold BUONO PRO NXG Storage Water Heater 25L – Free Standard Installation & Pipes, 5 Star Rated, ABS Body Vertical Geyser for Bathroom,3 Safety Levels, Rust Proof Body with Titanium Coating, White
  • TITANIUM PLUS TECHNOLOGY: Buono Pro NXG water heater has a superior durability thanks to its specially designed titanium steel tank which helps to resist pressure and water impurities
  • SMART GUARD: Buono Pro NXG has a special anode which performs an electrolytic process which protects the heating element from corrosion
  • RUST PROOF BODY: Buono Pro NXG is specially designed to make it rust free, increasing his life
  • SAFETY PLUS: 3 levels of safety against high temperature and pressure, provided by a hightech adjustable thermostat, cut-out and multi function safety valve according to international standards
  • HIGH PRESSURE RESISTANCE: the water heater has high pressure withstanding capacity, which makes it suitable for high-rise buildings and high pressure pump applications
AO Smith HSE-SHS-025 Storage 25 Litre Vertical Water Heater (Geyser) ABS Body | BEE 5 Star Superior Energy Efficiency | Enhanced Durability Blue Diamond Tank Coating | Suitable High rise Buildings
  • Type : Storage ; Capacity 25 Liters, Wattage 2000 Watts; Pressure : 8 bars Factory set thermostat – Max 75C Double Protection with Thermal Cut-Out and Multi-function Safety Valve
  • Outer Body – ABS Plastic – superior glossiness and surface finish. Inner Tank Material: Blue Diamond Glass Lined Tank- 2X Corrosion Resistance
  • Warranty: 5 years on inner tank, 2 years warranty on glass coated heating element and 2 years comprehensive
  • BEE 5 Star rated for Maximum energy savings

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.