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 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
Crompton Arno Neo 25-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: 25L; 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
Longway Superb 25 Ltr 5 Star Rated Automatic Storage Water Heater for Home, Water Geyser, Water Heater, Electric Geyser with Multiple Safety System & Anti-Rust Coating (Gray, 25 Ltr)
  • Type: Storage, Capacity: 25 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
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
Crompton Amica Pro 15-L, 5 Star Rated Storage Water Heater with Superior Glassline Coated Tank, Powerful 2000W Heating Element, Rust Proof Plastic Body and Advanced 3 Level Safety (White and Blue)
  • PRODUCT: Crompton’s 5 Star rated storage water heater comes in a Rust Proof Plastic body with a powerful 2000W heating element
  • Suitable for Hard Water: Crompton Amica Pro comes with Superior Glassline coating that prevents scaling & ensures longer life even in hard water conditions
  • 3 LEVEL SAFETY: High Precision Capillary Thermostat, Automatic thermal cut-out & multi-functional valve to provide higher safety and protection against electric shocks and overheat protection
  • Withstand upto 8 Bar Pressure: With the use of a multi-function valve and a single weld tank, the Amica Pro can withstand upto 8 bar pressures making it suitable for high-rise buildings
  • WARRANTY: 5 year warranty on Tank, 2 year warranty on Element and 2 year warranty on Product provided by Crompton from date of purchase
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.
AO Smith Geyser 25 Litre 5 Star Rating (BEE) | Powerful 2KW Heating | Storage Water Heater With 2X Corrosion Resistant Blue Diamond Glass Tank | Warranty: 5 Yr Tank, 2 Yr Comprehensive | HSE-SHS-025
  • DOUBLE SAFETY FOR RELIABLE HOT WATER: Stay safe with the AO Smith geyser 25 litre water heater. Its thermal cut-out, multi-function safety valve, and factory-set thermostat ensure worry-free and consistent hot water supply every day.
  • ELEGANT & DURABLE DESIGN FOR LONG-LASTING PERFORMANCE: The AO Smith geyser 25 liter features a sleek ABS plastic body and blue diamond glass-lined tank, offering 2X corrosion resistance, making it the most stylish and durable 25 litre geyser for your bathroom.
  • ENERGY SAVINGS WITH 5-STAR RATED EFFICIENCY: Save more with this electric geyser 25 litre water heater. Its BEE 5-star rating ensures maximum energy efficiency, reducing your electricity bills while delivering eco-friendly and powerful performance.
  • POWERFUL HEATING FOR QUICK HOT WATER: Experience instant heating with the 2000W heating element in this AO Smith 25 litre geyser. Ideal for bathrooms with high water usage or overhead showers, it delivers hot water fast, saving you time.
  • DESIGNED FOR HIGH-PRESSURE CONDITIONS: The AO Smith geyser 25 litre is perfect for high-rise apartments and hard water areas, thanks to its ability to handle up to 8 bars of pressure. Enjoy uninterrupted hot water, no matter where you live.
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 Geyser 25 Litre 5 Star Rating (BEE), Vertical Water Heater With Quick Heating | Geyser 25 Ltr For High Rise Building | 7 Year Tank Warranty, 2 Year Comprehensive Warranty | SDS-GREEN-025
  • INSTANT HOT WATER WITH DURABLE DESIGN: Experience luxurious hot water with AO Smith 25 Litre Water Heater. Featuring a 2000W heating element and Blue Diamond Glass-Lined Tank, this 5-star rated geyser offers 2X corrosion resistance for lasting performance and comfort.
  • PERFECT FOR HIGH-RISE BUILDINGS: AO Smith 25 Litre Geyser handles 8 Bar pressure effortlessly, making it ideal for high-rise apartments. Its custom-built anode rod protects against hard water, extending the lifespan of this geyser for bathrooms by years.
  • ENERGY-SAVING 5-STAR PERFORMANCE: Save on electricity bills with our 5-star rating 25-litre geyser. Designed with an ABS outer body and advanced energy-efficient technology, this electric geyser ensures reduced power consumption without compromising on performance.
  • LONG-LASTING BUILD FOR RELIABILITY: With a Glass-Coated Heating Element, AO Smith 25 Litre Water Heater resists scale and sediment, reducing maintenance needs. Built for longevity, this geyser 25-litre ensures reliable hot water for years.
  • PRIORITIZED SAFETY AND PROTECTION: AO Smith 25-Litre Electric Geyser features a shock-proof ABS outer body for safety. Built to offer secure, fast-heating hot water, this 5-star rated geyser is the ultimate choice for peace of mind and comfort.

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.