AC Electricity Cost in Patna
(2026)
Complete AC electricity cost guide for Patna. Monthly bill, units consumed, and money-saving tips based on Bihar tariff of ₹6/unit.
Quick Answer
₹2,457
Monthly Cost
409
Units/Month
₹6
Per Unit Rate
A 1.5-ton 5-star inverter AC running 13 hours/day in Patna costs approximately ₹2,457 per month at the Bihar electricity rate of ₹6/unit. A 3-star non-inverter AC would cost ₹3,510/month — that's ₹1,053 more every month.
AC Electricity Cost Calculator
₹6.3
Per Hour
₹2,457
Monthly
409
Units/Month
AC Cost Breakdown in Patna
Factors Affecting Your AC Electricity Cost
Temperature: Patna reaches 42°C in peak summer. Every 1°C above 35°C increases AC consumption by ~2.5%.
Usage Hours: Patna averages 13 hrs/day in May – July. More hours = proportionally higher bills.
Star Rating: 5-star inverter ACs consume ~43% less electricity than 3-star models. At 13 hrs/day, this saves ₹1,053/month.
Electricity Rate: Bihar's rate of ₹6/unit directly multiplies your consumption cost.
Room Size & Insulation: Poorly insulated rooms in Patna lose cool air fast, increasing AC runtime by 15–25%.
AC Age & Maintenance: Dirty filters increase consumption by 10–15%. Annual servicing saves ₹500–1,000/month in Patna.
How to Reduce Your AC Electricity Bill
Patna's frequent power cuts mean inverter ACs with wide voltage tolerance are critical. They restart smoothly after cuts without compressor damage.
Set AC to 24–26°C — each degree above 18°C saves ~6% on your Patna bill. That's 24–36% savings at 26°C vs 18°C.
Use ceiling fan with AC — allows 2°C higher setpoint with same comfort, saving 12–14% on electricity.
Clean filters every 3 weeks in May – July — Patna's humid subtropical climate clogs filters faster.
Seal room gaps and use thermal curtains — reduces AC load by 15–20% in Patna's heat.
Upgrade to 5-star if you use AC more than 6 hours daily — the moderate electricity rate in Patna ensures fast payback.
Best ACs to Save Electricity
Daikin 1.5 Ton 5-Star Inverter
Save ₹650/month vs 3★
Voltas 1.5 Ton 5-Star Inverter
Save ₹580/month vs 3★
LG 1.5 Ton 5-Star AI Inverter
Save ₹560/month vs 3★
Find the Most Energy-Efficient AC for Your Usage
We compared 50+ models across ISEER, star rating, and real electricity cost. See the top picks that save ₹7,000+ per year on your bill.
See Best Energy-Efficient 1.5T ACs 2026Related Guides & Calculators
Frequently Asked Questions
AC Electricity Cost in Patna — Complete 2026 Guide
Patna is located in Bihar, which has a domestic electricity tariff of ₹6 per unit (kWh) as per the 2026 tariff revision. For a typical household running a 1.5-ton AC for 13 hours per day, the AC alone accounts for 40–60% of the total electricity bill during peak summer months (May – July).
Patna's Humid Subtropical climate means average summer temperatures of around 42°C. Patna has extremely hot and humid summers — 44°C+ with high humidity. ACs run 12–14 hrs/day. Power cuts are common; inverter ACs with wide voltage range are essential. This directly impacts how hard your AC works — in extreme heat, the compressor runs at higher capacity for longer durations, consuming significantly more electricity.
Choosing the right AC for Patna is critical. A well-sized 5-star inverter AC is the most energy-efficient choice. The standard rule is 0.0667 tons per square foot, but in Patna's heat, add 10–15% buffer tonnage for rooms above ground floor or with direct sun exposure.
For Patna residents, the BEE 5-star rating is a financial decision, not just a label. A 5-star inverter AC saves approximately ₹6,318/year compared to a 3-star model. Given Patna's 13-hour daily usage, the return on the ₹5,000–8,000 premium is achieved within 12–18 months.
₹6/unit
Bihar Tariff
May – July
Peak Season
42°C
Avg Summer Temp
13 hrs
Avg Daily Usage
₹2,457
1.5T 5★ Monthly
₹1,053/mo
3★ vs 5★ Saving
- In Patna, use a 5-star inverter AC — the 13-hour daily usage ensures fast payback on the star-rating premium.
- Set thermostat to 24–26°C. In Patna's climate, 25°C with a ceiling fan feels as cool as 21°C without one.
- Schedule AC servicing before May. A well-maintained AC uses 10–15% less electricity in Patna's dusty summer.
- If your Patna home gets direct afternoon sunlight, use reflective window film — it reduces AC load by 10–20%.
Looking for the most energy-efficient 1.5 Ton AC in Patna?
We compared 50+ models across ISEER, star rating, and real electricity cost. See the top picks that save ₹7,000+ per year on your bill.
See Best Energy-Efficient 1.5T ACs 2026 →