How much electricity does a 1.0 HP Water Pump consume per month?

A 1.0 HP submersible water pump has an electrical input power of ~0.95 kW (950 Watts) at 78% efficiency. Running 1 hour daily consumes ~28.50 Units of electricity per month (~₹213.75/month at ₹7.50/unit).

Why does a 1.0 HP pump draw 950 Watts instead of 746 Watts?

1 HP mechanical shaft power equals 745.7 Watts. However, electrical input power from the grid is higher due to motor and hydraulic pump losses (~75%–80% overall efficiency). Therefore, 0.746 kW mechanical power requires ~0.95 kW electrical input power.

How long does a 1.0 HP submersible pump take to fill a 1000 Litre overhead tank?

A 1.0 HP domestic submersible pump with a flow rate of 65 Liters Per Minute (LPM) fills a 1000L overhead tank in approximately 15.4 minutes, consuming ~0.244 kWh of electricity (costing ~₹1.83 per tank fill).

Are submersible water pumps subject to BEE Star Labeling in India?

Yes. BEE Schedule 10 governs energy efficiency labeling for openwell and submersible pumpsets in India based on BIS IS 8034 standards.

BEE Schedule 10 & BIS IS 8034 Submersible Standard

Submersible Water Pump Electricity Cost Calculator

Calculate exact electrical input kW, monthly power bills, overhead tank fill times, and energy cost for 0.5 HP to 2.0 HP water pumps.

BEE Schedule 10 & BIS IS 8034 Submersible Engine

Submersible Water Pump Electricity Cost Calculator

[REPRESENTATIVE INDUSTRY BENCHMARK]

1. Select Water Pump Category Benchmark

Overhead Tank Capacity (Liters)

Daily Operating Duration (1 Hours / day)

Tariff Calculation Bridge

Estimated Monthly Electricity Bill

₹384.59

Based on 28.5 Units/month

1000L Tank Fill Duration

15.38 Mins

At 65 LPM Flow Rate

Cost per 1000L Tank Fill

₹3.29

Energy per Fill: 0.244 kWh

Electrical Input Power

0.95 kW (746W Shaft)

Pumpset Eff: 78%

🧾 Step-by-Step Calculation Audit Proof

Electrical Input Power & Pumpset Efficiency

(1 HP × 0.7457 kW) ÷ 78% overall efficiency

0.95 kW Electrical Input Power

Overhead Tank Fill Time & Energy per Fill

1000L ÷ 65 LPM = 15.38 mins | 0.95 kW × (15.38m ÷ 60)

15.38 Mins | 0.244 kWh / fill

Total Monthly Grid Energy Consumption

0.95 kW × 1 hrs/day × 30 days

28.5 Units / month

Estimated Monthly Electricity Bill & Cost per Tank Fill

28.5 Units calculated via UPPCL Urban LMV-1 Tariff Engine (UPERC Order)

Bill: ₹384.59/mo | Fill Cost: ₹3.29/fill

BEE Schedule 10 & Motor Efficiency Disclosure:

Submersible water pump performance is governed by BEE Schedule 10 star labeling and BIS IS 8034 standards.
Pumpset electrical input power (kW) exceeds mechanical horsepower output due to motor & hydraulic efficiency (~75-83%).
Calculated energy and cost figures preserve double precision internally while rounding presentation values.

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Universal Unit Converter Hub

Convert Mechanical Horsepower (HP) to Electrical Kilowatts (kW).

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How Water Pump Electricity Consumption is Calculated

Water pump power draw is measured in Electrical Input Power (kW), which accounts for motor & hydraulic conversion efficiency (~78%) on top of mechanical shaft power (1 HP = 0.746 kW).

Electrical Input Power (kW) = (Mechanical HP × 0.7457) ÷ Pumpset Efficiency (0.78)

Tank Fill Time (Mins) = Overhead Tank Capacity (Liters) ÷ Flow Rate (LPM)

Worked Example (1.0 HP Kirloskar Pump): 0.95 kW Input, 65 LPM Flow, 1.0 h/day = 0.95 kWh/day $\rightarrow$ 28.50 Units/month (₹213.75/month @ ₹7.50/unit | ₹1.83 per 1000L tank fill)

Water Pump HP & Flow Rate Comparison Table

Pump Rating	Electrical Input kW	Flow Rate (LPM)	Monthly Grid Units (1.0 h/day)	Monthly Bill (30 days @ ₹7.50/unit)
0.5 HP Mini Monoblock	0.50 kW (500 W)	35 LPM	15.00 Units	₹112.50 / month
1.0 HP Domestic Submersible	0.95 kW (950 W)	65 LPM	28.50 Units	₹213.75 / month
1.5 HP Borewell Submersible	1.40 kW (1,400 W)	90 LPM	42.00 Units	₹315.00 / month
2.0 HP High Head Submersible	1.80 kW (1,800 W)	120 LPM	54.00 Units	₹405.00 / month

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