A 15 kva stabilizer keeps the voltage steady for a running load of up to about 9.6 kW. That suits a large home with three ACs, an office, a clinic or a small workshop. Many buyers call it a 15 kb stabilizer; “KB” is a common way of saying kVA, so both mean the same 15 kVA rating.
SG Power Products Pvt. Ltd. is one of the Noida-based 15 kva servo stabilizer manufacturers, with 15+ years of experience and its own factory in Ghaziabad. This page covers the 15 kva stabilizer price for single and three phase models, how much load it runs, specifications and how to choose.
| Capacity | 15 kVA (15,000 VA, about 12 kW at a 0.8 power factor) |
| Recommended running load | Up to about 9.6 kW, allowing a 25% safety margin |
| Models | Single phase and three phase |
| Cooling | Air cooled |
| Input range | Single phase: 170–270V or 190–270V · Three phase: 340–480V (P-P) / 170–280V (P-N); custom on request |
| Output voltage | 230V ±1% single phase (220/230/240V settable) · 410V ±1% (P-P) and 230V ±1% (P-N) three phase |
| Regulation and efficiency | ±1% regulation, 97% efficiency tested to IS 2026 (Part 1) |
| Output delay | Adjustable from 3 to 200 seconds |
| Control | KNEUTRON microcontroller-based, true RMS sensing, digital display |
| Approximate price | From about ₹40,000 + GST (single phase) |
| Testing | 100% units tested, 173 checkpoints, NABL lab-tested design |
Prices are indicative. For the latest price, contact SG Power.
Download the 15 kVA air cooled datasheet (PDF)Need a reliable 15 kVA unit for a large home, office or workshop? Buy straight from SG Power, with no trader's margin, a free load and site-voltage check, and single or three phase models matched to your area.
| From SG Power Directly | From a Trader or Reseller |
|---|---|
| Factory pricing | Reseller margin added |
| Sizing by the team that builds the unit | Advice varies by seller |
| Input range and phase matched to your site | Mostly stock models only |
| Every unit tested through 173 checkpoints | Testing depends on the source |
| Service support in 319+ cities | Depends on the reseller |
A 15 kVA stabilizer is a voltage stabilizer rated for 15,000 VA, or about 12 kW at a 0.8 power factor. A servo type uses a motor-driven variac and a buck-boost transformer to hold the output steady when the mains rises or falls. It comes in single phase for homes and three phase for buildings and machines.
It is also called a 15 kva servo stabilizer, a 15 kva voltage stabilizer or an automatic voltage regulator (AVR). SG Power's 15 kVA models are part of its KNEUTRON servo voltage stabilizer lineup from 10 to 500 kVA, in the air cooled series.
A 15 KB stabilizer is the same as a 15 kVA stabilizer. “KB” is an informal way many buyers and electricians in India say kVA. A 15 KB stabilizer, a 15 kVA stabilizer and a 15,000 VA stabilizer all mean the same capacity, about 12 kW at full rating.
The 15 kb stabilizer price depends mainly on whether it is single phase or three phase, plus its input voltage range and build quality. Wide-range models for low-voltage areas cost more.
| 15 kVA Model | Input Range | Best For | Approximate Price (+ GST) |
|---|---|---|---|
| Single phase, standard range | 170–270V or 190–270V | Large homes, offices and clinics | starts from ₹40,000 |
| Single phase, wide range (custom) | e.g. 140–280V or 110–280V | Rural and very low-voltage areas | Price on request |
| Three phase, standard range | 340–480V (P-P) / 170–280V (P-N) | Workshops, offices, large homes on three phase | starts from ₹45,000 |
| Three phase, wide range (custom) | Wider than standard | Low-voltage industrial areas | Price on request |
Prices exclude GST (servo stabilizers are generally billed at 18%), freight and installation. Prices are indicative. For the latest price, contact SG Power.
Online listings for a 15 kVA stabilizer range from about ₹17,000 to over ₹60,000, because sellers list different products under the same rating. The cheapest are relay-type mainline units; servo models cost more. Single and three phase, narrow and wide input ranges, and aluminium and copper windings also appear side by side.
| Price Band (Online Listings) | What You Usually Get |
|---|---|
| Under ₹20,000 | Relay-type mainline stabilizers that correct in steps, not servo |
| ₹20,000 – ₹40,000 | Standard single-phase servo models, and some three-phase units |
| ₹40,000 – ₹60,000 | Wide-range single-phase or standard three-phase servo models |
| Over ₹60,000 | Wide-range three-phase, heavy-duty or oil-cooled units |
These bands describe what other sellers list online, not SG Power's own prices. Prices are indicative. For the latest price, contact SG Power.
A 15 kVA stabilizer with a 90–300V input range is built for areas where voltage falls very low, such as villages and the ends of long supply lines. The wider range needs a larger transformer, so it costs more. In most towns and cities, a 170–270V or 190–270V servo model is enough; SG Power builds wider ranges to order.
The 15 kva servo stabilizer price depends mainly on phase, input voltage range and build quality. Three-phase models and wider input ranges cost more. Winding material, protections, display, testing, GST, freight and installation explain the rest of the difference between two quotes, so compare like for like.
Single or three phase: three-phase models correct each phase and add phase protections
Input voltage range: wider ranges need larger transformers
Winding and core: copper windings and good CRGO cores run cooler and last longer, but cost more
GST, freight and installation: often quoted separately
A 15 kVA stabilizer can carry about 12 kW at full rating. For safe everyday use, keep the running load to about 9.6 kW, which leaves a 25% margin for the surge when ACs, pumps or compressors start. That suits a large home with three ACs, a geyser and a pump.
Sizing formula: Required kVA = (running load in kW ÷ 0.8) × 1.25
Checking a load in watts: watts = volts × amps × power factor. A 15 kVA rating means 15,000 volt-amperes, not 15,000 watts, so add up the real watts of everything that runs together and keep the total under about 9.6 kW.
| Example Load | Running Load | Is 15 kVA Right? |
|---|---|---|
| Large home: 3 × 1.5 ton ACs, fridge, washing machine, TV, lights | about 7.5 kW | Yes |
| Villa: 3 ACs, geyser and 1 HP pump | about 9 kW | Yes |
| Office: 25 computers, 2 ACs, printers, lighting | about 8 kW | Yes |
| Clinic or lab: diagnostic equipment, 2 ACs, lighting | about 7 kW | Yes |
| Workshop: small machines and a compressor (three phase) | about 9 kW | Yes, three phase |
| 4 or more ACs, or a 10 kW load | 10 kW and above | No, choose 20 kVA |
Typical appliance wattage: 1.5 ton AC 1,500–2,000 W · 2 ton AC 2,000–2,700 W · refrigerator 150–300 W · washing machine 500–2,000 W · geyser 2,000–3,000 W · 1 HP pump about 750 W. For exact figures, check each appliance's nameplate or its BEE star label.
Size by what runs together, not by everything installed; a home with five ACs that runs only three at once can stay within 15 kVA
Leave room for future loads, such as another AC or a lift, so you don’t outgrow the unit in a year or two
Geysers and room heaters handle voltage swings well; some homes keep them off the stabilizer to save capacity for ACs and electronics
A 15 kVA stabilizer can run three 1.5 ton ACs together with a refrigerator, washing machine, TV and lights, which add up to about 7.5 kW. Three 2 ton ACs with other loads come close to the 9.6 kW limit. For four or more ACs running together, choose a 20 kVA stabilizer.
| AC Setup | Load With Other Appliances | Right Size |
|---|---|---|
| Two 1.5 ton ACs | about 5.5 kW | 10 kVA |
| Three 1.5 ton ACs | about 7.5 kW | 15 kVA |
| Three 2 ton ACs | about 9–9.5 kW | 15 kVA (near the limit) |
| Four or more ACs | 10 kW and above | 20 kVA |
Size for the ACs you expect to run together on the hottest evening. Inverter ACs usually draw less than fixed-speed ACs once running, so check each AC's rated input power.
Not sure about your load? Send us your appliance list and we will confirm whether 15 kVA is the right capacity for your site.
Get Free Sizing AdviceChoose 10 kVA for a home with two ACs and 15 kVA for a large home or office with three ACs. Choose 20 kVA for four or more ACs, or a running load above about 9.6 kW. Buying the right size the first time avoids overload trips and early wear.
| 10 kVA | 15 kVA | 20 kVA | |
|---|---|---|---|
| Full rating (0.8 power factor) | about 8 kW | about 12 kW | about 16 kW |
| Safe running load (25% margin) | about 6.4 kW | about 9.6 kW | about 12.8 kW |
| Typical home | 2 ACs | 3 ACs | 4+ ACs |
| Typical business | Office, shop | Large office, clinic, workshop | Small factory, building |
| Approximate price (+ GST) | starts from ₹32,000 (single phase) · starts from ₹35,000 (three phase) | starts from ₹40,000 (single phase) · starts from ₹45,000 (three phase) | starts from ₹50,000 (three phase) |
Prices are indicative. For the latest price, contact SG Power.
Compare the 10 kVA servo stabilizer and the full servo stabilizer price list.
Not sure whether 15 kVA is enough? Share your appliance list, and we'll recommend the right size.
Choose the 15 kVA stabilizer that matches your electricity connection. A single phase 15 kva stabilizer suits large homes, villas, clinics and offices with a single-phase supply. A 3 phase 15 kva stabilizer suits workshops, offices and large homes with a three-phase connection, and adds phase reversal and single phasing protection.
| Single Phase 15 kVA | Three Phase 15 kVA | |
|---|---|---|
| Supply | 230V single-phase connection | 415V, three phases plus neutral |
| Full-load current | about 65 A | about 21 A per phase |
| Extra protections | Not applicable | Phase reversal and single phasing |
| Typical users | Large homes, villas, clinics, offices | Workshops, CNC machines, offices, large homes |
A home with a three-phase connection can use one 15 kVA three phase stabilizer or separate single-phase stabilizers on each phase. An unbalanced three-phase unit can also feed single-phase circuits from each phase. Separate single-phase units keep the other phases running during a phase failure, so they often suit homes better.
| Option | Best For | Trade-off |
|---|---|---|
| One 15 kVA three phase stabilizer | Three-phase motors, pumps, lifts, workshops | Switches off all phases if one is lost; costs more than a single-phase unit of the same rating |
| Single-phase stabilizers on each phase | Homes where each phase feeds separate rooms or floors | More units to install, but one failed phase doesn’t black out the house |
The SG Power 15 kVA servo stabilizer is air cooled and available in single and three phase. Single-phase models hold 230V ±1% from 170–270V or 190–270V input; three-phase models hold 410V ±1% phase to phase from a 340–480V supply. Efficiency is 97%, tested as per IS 2026 (Part 1):1977, and the output delay is adjustable from 3 to 200 seconds.
| Parameter | Single Phase 15 kVA | Three Phase 15 kVA |
|---|---|---|
| Capacity | 15 kVA | 15 kVA |
| Input voltage range | 170–270V or 190–270V | 340–480V (P-P), 170–280V (P-N) |
| Output voltage | 230V ±1% (220/230/240V settable) | 410V ±1% (P-P), 230V ±1% (P-N) |
| Regulation | ±1% | ±1% |
| Efficiency | 97% | 97%, tested as per IS 2026 (Part 1):1977 |
| Output frequency | 50 Hz ±3% | 50 Hz ±3% |
| Output delay | 3–200 seconds, adjustable | 3–200 seconds, adjustable |
| Cooling | Air cooled | Air cooled |
| Control | KNEUTRON microcontroller, true RMS sensing | KNEUTRON microcontroller, true RMS sensing |
| Motor | High-torque AC stepper motor | High-torque AC stepper motor |
| Winding | Pure copper winding | Pure copper winding |
| Housing and mounting | Powder coated CRC sheet, floor mounted | Powder coated CRC sheet, floor mounted |
| Transformer | In-house CRGO core, built to IS 9815 (Part 1), IS 5142 and IS 2026 | Same |
| Duty | 100% load, continuous | 100% load, continuous |
The three-phase figures are the Guaranteed Technical Particulars from SG Power's own datasheet for this model. Other input ranges are built to customer specification, and the IS standards are published by the Bureau of Indian Standards.
15 kVA air cooled servo stabilizer datasheet (PDF)Every SG Power 15 kVA unit has a KNEUTRON digital controller, a front-panel display and ±1% voltage regulation. It protects your appliances with over-voltage, under-voltage and overload cut-offs and an adjustable trip time delay; three-phase models add phase reversal and single phasing protection. Calibration is done on a touch-pad, with no potentiometer adjustment.
The display shows: input and output voltage, frequency and load current (phase-to-neutral and phase-to-phase voltage and the current of each phase on three-phase models).
| Protection | What It Guards Against |
|---|---|
| Over-voltage cut-off | High mains voltage reaching your appliances |
| Under-voltage cut-off | Very low voltage that overheats AC and pump motors |
| Overload cut-off | Load above 15 kVA; the output switches off with an “Overload” message and restarts when the load is reduced and Start is pressed |
| Trip time delay (3–200 seconds) | Compressor damage when power returns after a cut |
| Phase reversal cut-off (three phase) | Wrong phase sequence that can run motors backwards |
| Single phasing protection (three phase) | Loss of one phase, which can burn out three-phase motors |
A 15 kVA servo stabilizer corrects high voltage as well as low voltage. Its buck-boost transformer brings an input of, say, 250–260V down to the set 230V, which matters in homes near a transformer. If the mains goes above the input range, the over-voltage cut-off switches the output off to protect your appliances.
Inverters and basic UPS units usually pass high mains voltage straight through, and surge protection devices absorb only short spikes, so neither fixes a steady high voltage.
A 15 kVA stabilizer works alongside an inverter or UPS; it doesn't replace them, and they don't replace it. The stabilizer corrects mains voltage for the whole house, while the inverter or UPS gives backup during a power cut. A common order is meter, stabilizer, then inverter or UPS, but your electrician should confirm it.
A whole-house UPS of the same size is far costlier, so most homes pair a mainline stabilizer with a smaller inverter or UPS.
Place the stabilizer before the inverter, so the inverter charges from steady voltage; a stabilizer after the inverter only sees the inverter's own output
Size it for everything that passes through, including the inverter's battery-charging load, not just the appliances
A servo 15 kVA stabilizer adjusts voltage smoothly through a motor-driven variac, while a relay model jumps between fixed steps. At 15 kVA, the load usually includes several ACs, pumps or machines. For most buyers, the steadier ±1% output and longer life of a servo model are worth the extra cost.
| Feature | 15 kVA Servo Stabilizer | 15 kVA Relay Stabilizer |
|---|---|---|
| Correction | Smooth, stepless | In steps, often with a click |
| Output stability | Steady (SG Power: ±1%) | Varies in steps |
| Best for | ACs, pumps, machines, offices, clinics | Basic household loads |
| Suits | Wide or frequent voltage swings and motor loads | Moderate swings on light loads |
| Life span | Longer | Moderate |
Protecting several ACs or machines? A servo model is the safer choice.
A servo stabilizer gives a precise, steady output and adds no distortion to the voltage waveform, because it is simply a motor-controlled variable transformer. Its limits are mechanical wear of the carbon brush, slower correction than a static stabilizer, and no electrical isolation, so sudden spikes still need a surge protection device.
| Advantages | Limitations |
|---|---|
| ±1% output on SG Power models, smooth and stepless | Carbon brush and variac track wear, so yearly service is needed |
| Adds no waveform distortion | Corrects more gradually than a static (solid-state) stabilizer |
| Handles full load continuously, including motors and ACs | No galvanic isolation; pair with a surge device, or an isolation transformer for sensitive medical or lab loads |
| Rugged, repairable design with a long service life | Larger and heavier than relay types of the same rating |
A 15 kVA stabilizer is used where the running load is about 6.5 to 9.6 kW and needs steady voltage. Typical users are large homes and villas with three ACs, offices, clinics, labs, showrooms and small workshops. It is installed on the mainline, so one unit protects the whole building.
15 kVA stabilizer for home: whole-house protection for large homes and villas with three ACs, geysers and pumps
Offices and showrooms: computers, servers, lighting and air conditioning
Small workshops and buildings: CNC machines, compressors, pumps and HVAC on a three-phase supply
15 kVA lift stabilizer: three-phase units for passenger lifts
Clinics and labs: diagnostic and lab equipment; pair with an isolation transformer for sensitive medical loads
A 15 kVA stabilizer suits a DJ or sound setup whose amplifiers, lights and other gear draw up to about 9.6 kW together. Steady voltage protects amplifiers and mixers from dips and surges, especially on generator power at events. Size it from the total rated power of all equipment, then add the usual 25% margin.
To choose between 15 kVA servo stabilizer manufacturers, check that the unit is sized for your load, covers your area's lowest voltage and matches your phase. Then compare regulation, protections, in-house manufacturing, testing and local service. Ask each seller these ten questions:
Is it a servo or a relay stabilizer, and single or three phase?
What input range does it cover? (Note your lowest voltage over a few days first.)
What output regulation and efficiency does it hold? (SG Power: ±1%, 97%)
Is the winding copper or aluminium, and are the transformers made in-house?
Does it include over/under voltage, overload and time delay protection (plus phase protection on three phase)?
Was the unit tested before dispatch, which standards does it follow, and is there a lab test report? (SG Power: 173 checkpoints, IS 9815 design, ISO 9001:2015, NABL lab-tested design)
Are GST, freight and installation included?
Who services it near me?
What warranty and AMC (annual maintenance contract) are offered, in writing?
Are spare parts, such as carbon brushes and control cards, available locally?
Have a qualified electrician install the 15 kVA stabilizer on the mainline after the meter, with correctly sized cables and proper earthing. The installation should follow the CEA safety and electric supply regulations. Upkeep is simple: keep it clean and ventilated, and book a yearly service.
Size cables and breakers for about 65 A on single-phase 15 kVA units
Plan a dry, ventilated floor spot near the main distribution board; never box or cover the unit, as it needs free airflow
Connect the stabilizer’s body earth terminal to the building’s earthing system
Fit a surge protection device ahead of the stabilizer; a servo unit corrects slow voltage changes, not lightning spikes
Choose a supplier with prompt local service, because a failed whole-house unit leaves every appliance on bypass
On three-phase units, check the phase sequence at installation
Check your earthing too. SG Power also makes earthing rods, chemical earthing electrodes and earth pit covers, plus lightning protection systems.
| Task | How Often | Who |
|---|---|---|
| Dust the body and vents | Monthly | User |
| Check input and output readings | Weekly | User |
| Inspect and replace worn carbon brushes | Yearly, or if correction slows | Trained technician |
| Full service and calibration | Yearly or under AMC | SG Power service |
Need a 15 kVA stabilizer installed or serviced? We'll recommend the right model and arrange delivery and service in your city.
SG Power has built servo stabilizers for 15+ years, makes its transformers in-house and tests every unit before dispatch. It offers single and three phase 15 kVA models with custom input ranges, and supports customers in 319+ cities, so you get factory pricing and local service.
| Why SG Power | Detail |
|---|---|
| Experience | 15+ years of manufacturing |
| Factory | 7,000 sq m in Ghaziabad, 84 machines, 250+ employees |
| Quality | 100% units tested, 173 checkpoints, NABL lab-tested design |
| Performance | ±1% regulation, 97% efficiency |
| Certifications | ISO 9001:2015, CE, RoHS, MSME registered |
| Customers | 5,937+ customers, service in 319+ cities |
| Range | 10 kVA to 500 kVA |
See the full range on our servo voltage stabilizer page, compare air cooled and oil cooled models, or learn more about SG Power.
Each SG Power 15 kVA stabilizer goes through a 3-level quality check covering 173 checkpoints before it leaves the factory. The servo stabilizer design has also been tested at an NABL-accredited laboratory (Hydel Laboratories) for performance and safety.
SG Power makes its 15 kVA stabilizers at its own factory in Ghaziabad, where transformers and variacs are wound and tested in-house.
SG Power supplies power and electrical safety products to government bodies, PSUs and well-known companies across India:
| Sector | Organisations |
|---|---|
| Power and utilities | POWERGRID, NTPC, BHEL, NPCL, Coal India |
| Infrastructure and metro | L&T, Alstom, Indian Railways, Shapoorji Pallonji |
| Defence and government | DRDO, Indian Army, BSF, Airports Authority of India |
| Industry and corporate | Siemens, JSW, Hindalco, JK Cement, Apollo Tyres, ICICI Bank |
Project Location - Karnataka
Power infrastructure project with advanced electrical solutions.
Project Location - Kanheri Hills
Defence sector electrical and protection systems.
Project Location - Hyderabad
Airport infrastructure and electrical safety solutions.
Project Location - Pune
Metro rail electrical installations and grounding systems.
Project Location - Ajmer
State electricity distribution network solutions.
Project Location - Jodhpur
Power distribution and earthing solutions.
Project Location - Bangalore, Noida
Heavy electrical and industrial power systems.
Project Location - Odisha
Steel industry electrical infrastructure solutions.
Project Location - Nashik, Chhattisgarh
Defence-grade electrical protection systems.
Project Location - Lucknow, Jabalpur
Telecom infrastructure and grounding systems.
Project Location - Ghaziabad
Government electronics and power systems.
Project Location - Sambalpur
Aluminium industry electrical safety solutions.
Project Location - Srinagar
Military-grade electrical infrastructure.
Project Location - Kerala
Railway electrification and protection systems.
Project Location - Rajasthan
Cement industry electrical solutions.
Project Location - Haryana
State power distribution infrastructure.
Project Location - Noida
Industrial electrical and safety systems.
Project Location - Khavda, Bikaner
Large-scale construction and power projects.
Project Location - Noida
Private electricity distribution systems.
Project Location - Chhattisgarh
Thermal power plant electrical solutions.
Project Location - Shahjahanpur
Power generation and infrastructure systems.
Project Location - Gurugram
Aviation electrical infrastructure solutions.
Project Location - Noida
Smart city electrical and infrastructure systems.
SG Power Products Pvt. Ltd. is rated 4.2 out of 5 by 132 buyers on IndiaMART (checked October 2026). The rating covers all SG Power products bought through IndiaMART, including servo voltage stabilizers, earthing products and lightning arresters.
| Source | Rating | Number of Ratings |
|---|---|---|
| IndiaMART | 4.2 out of 5 | 132 |
SG Power Products Pvt. Ltd. is a 15 kVA servo stabilizer manufacturer and supplier based in Sector 62, Noida, with its own factory in Ghaziabad. It delivers and services single and three phase 15 kVA stabilizers across Delhi NCR, Uttar Pradesh and the rest of India.
SG Power supports customers in 319+ cities, including Noida, Delhi, Gurugram, Ghaziabad, Faridabad, Kanpur, Hyderabad, Chennai, Pune, Ahmedabad and Bengaluru.
Want a 15 kVA stabilizer delivered to your city? Ask for a quote, and we'll confirm the 15 kVA model, price and delivery.
A 15 kVA (15 KB) stabilizer carries about 12 kW at full rating; keep the running load to about 9.6 kW.
It runs three 1.5 ton ACs plus other appliances; four or more ACs need 20 kVA.
A single-phase 15 kVA servo stabilizer typically starts from ₹40,000 + GST; three phase ₹45,000 + GST.
SG Power makes 15 kVA models in single phase (230V ±1%) and three phase (410V ±1% phase to phase), at 97% efficiency.
SG Power Products Pvt. Ltd. is based in Sector 62, Noida, with its own factory in Ghaziabad.
Prices are indicative. For the latest price, contact SG Power.
Contact SG Power for a free load check and the latest 15 kVA stabilizer price. Whether you need a single phase or three phase 15 kVA servo stabilizer for a home, office or workshop, we'll match the model and input range to your site. We supply across India from Noida.