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, Heating Element – Copper
  • 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 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】
  • ✅ 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
  • ✅ Bajaj Shield Series New Shakti comes with multiple safety system, LED Indicator for power on & heating function, Magnesium Anode, Thermostat Knob for temperature Setting and Fire-Retardant cable with 16A Plug
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
AO Smith Geyser 15 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-015
  • 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.
  • RAPID HEATING PERFORMANCE: Get hot water instantly with the powerful 2000W heating element in this AO Smith 15L geyser. Ideal for busy mornings, it heats water quickly, making it perfect for bathrooms with overhead showers or high usage needs.
  • 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.
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 Divino DG Geyser 15 Litre Water Heater for Home | Digital Display | 5 Star Rating | Vitreous Enamel Coating | Advanced 4 Layer Safety | Suitable for Hard Water & High-rise Building | White
  • 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 25-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
Racold Altroi+ DN 6L 3KW Vertical 5 Star Instant Water Heater (Geyser) White, with Free Standard Installation & Pipes | Smart LED Ring|Free Electric Plug| for Kitchen & Bathroom, Wall Mounting
  • High Pressure Resistance: Your water heater has high pressure withstanding capacity, which makes it suitable for high-rise buildings and high pressure pump applications
  • Temperature Regulation Knob: An easy control knob through which you can regulate heating of water as per your requirement
  • Safety Plus: Three 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
  • Customized Application : It’s a unique, novel and first of its kind feature in the Instant water heater segment helps you in optimizing water heater usage . You can select ‘KITCHEN’ or ‘BATHING’ mode based on the intended hot water application
  • Smart LED Ring : The Smart LED Ring range senses when hot water is ready for bath, or other application and notifies user by changing LED color from blue to red
Racold Buono Pro NXG 15L Water Heater (Geyser) – ABS Body, Free Installation & Pipes, 5 Star Rated, 5 Years Warranty on Tank, Titanium Coating, Vertical Storage Geyser for Bathroom, 3 Safety Levels
  • 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 .
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
  • 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.