How to Read an Industrial Electricity Bill in India

Direct Answer

An industrial electricity bill in India separates into four cost families: the energy charge (billed in ₹/kVAh on HT connections, which ties what you pay to your power factor), the fixed and demand charge (₹/kVA of contracted demand), government levies such as electricity duty and fuel surcharge, and time-of-day adjustments. Rooftop solar reduces only the consumption-based part — and at the full retail energy charge only for power you self-consume — so the number that matters before signing any solar contract is your blended rate after solar, not the headline tariff.

TL;DR

• DHBVN HT energy charges in FY2025-26 run at roughly ₹6.55-6.85/kVAh depending on voltage level, plus around ₹290/kVA/month in fixed charges (HERC order dated 28.03.2025; Sales Circular D-04/2025 dated 11.04.2025).
• kVAh billing links your energy cost to power factor against a 0.90 benchmark — a poor power factor means paying for units you did not actually consume.
• Fixed and demand charges in ₹/kVA are not reduced by solar kWh credits, and exported solar is typically credited below retail.
• The key pre-solar diligence step: blended ₹/kWh = total grid rupees payable after solar ÷ total kWh consumed.

The anatomy of an HT electricity bill

Use a DHBVN bill as the worked example — the structure is broadly similar across North Indian discoms. The main blocks:

• Contracted load vs recorded maximum demand. The bill shows the load you contracted for and the maximum demand actually recorded in the billing month. Exceeding contracted demand attracts penal rates — a load-management problem no solar plant fixes.
• Energy charge. For HT consumers this is billed in ₹/kVAh, not ₹/kWh. DHBVN's HT energy charges for FY2025-26 sit at roughly ₹6.55-6.85/kVAh depending on voltage class (HERC tariff order dated 28.03.2025, operationalised through Sales Circular D-04/2025 dated 11.04.2025).
• Fixed/demand charge. Around ₹290/kVA/month on contracted demand.
• Electricity duty, municipal tax and FSA. Levied separately on top of the energy bill; fuel surcharge adjustments (FSA/FAC) pass through fuel-cost changes.
• ToD/ToU slots. Time-differentiated energy rates across the day, rewarding or penalising when you consume.
• Power factor incentive/penalty. Benchmarked at 0.90; because billing is in kVAh, a poor power factor inflates the units you pay for, and explicit penalties can apply on top.
• MMC, arrears and other items. Meter and metering charges, plus any accumulated dues recovered through the bill.

Here is the same anatomy as a table, with the solar impact spelled out:

Why kVAh billing changes the solar math

Most North Indian discoms bill HT consumers in kVAh — apparent energy — rather than kWh. Power factor is the ratio between real consumption (kWh) and apparent consumption (kVAh). Against the 0.90 benchmark, a falling power factor inflates billed units relative to the energy you actually used, and explicit incentive or penalty clauses can apply on top.

What does this mean for solar? Self-consumed solar units avoid the kVAh energy charge, so the savings logic still works — but the interaction between solar inverters and your metered power factor depends on the inverter configuration and how the discom meters the connection. Treat power factor management as its own workstream rather than assuming solar fixes it automatically.

Riders that move the bill: ToD, FSA and FPPAS

Beyond the base tariff, three riders routinely change what factories actually pay:

• ToD/ToU slots. Haryana HT consumers face time-differentiated rates through the day. Solar generation coincides with the daytime slots, which strengthens the savings case; see Haryana's industrial ToD tariff and smart meter changes.
• FSA/FAC. Fuel surcharge adjustments track changes in the discom's power purchase cost and appear as a separate ₹/unit line.
• FPPAS in Uttar Pradesh. UP levies a Fuel and Power Purchase Adjustment Surcharge, published monthly as a ₹/unit rider on the UPPCL tariff page under the UPERC Tariff Order for FY2025-26, approved on 22.11.2025.

Because these riders change month to month, never compute your effective rate from a single bill — always average over twelve months.

The pre-solar diligence step: compute your blended rate

This is the single most useful calculation a factory can run before evaluating rooftop solar:

1. Collect twelve months of bills. Capture seasonal variation — summer cooling loads, holiday shutdowns, production cycles.
2. Sum total rupees payable — energy charge, fixed/demand charge, duty, riders, everything.
3. Sum total kWh consumed over the same period.
4. Divide. Total grid rupees ÷ total kWh = your blended ₹/kWh. This is the number solar competes against.
5. Model the after-solar bill. Self-consumed solar is worth the full retail energy charge per unit. Exported units are typically credited at a feed-in or banking rate below retail, so oversizing a plant beyond your daytime load dilutes savings. Fixed and demand charges in ₹/kVA remain in the model unchanged.

The blended rate is usually meaningfully different from the headline energy charge once duty, riders and ToD effects are included — which is why bill-based math beats brochure-based math.

What this means before you sign a solar contract

Insist that any EPC models your actual bill line by line, component by component, rather than quoting a generic ₹/kWh savings figure; see how to read a solar EPC quote in India. If your plant sits in Haryana, interconnection and net metering specifics sit with the discom — start with DHBVN net metering for industrial consumers. And factor in the tariff cycle: rising energy charges improve the economics of every self-consumed solar unit, as covered in FY27 tariff hikes and C&I solar ROI.

Frequently Asked Questions

Why is my bill in kVAh and not kWh?

HT connections are billed in kVAh (apparent energy) so that the discom can charge for both the energy you consume and the reactive power your load draws. Against the 0.90 power factor benchmark, a poor power factor inflates billed units relative to actual kWh consumed.

Does rooftop solar reduce my fixed and demand charges?

No. Fixed and demand charges are levied on contracted demand in ₹/kVA and do not fall when your kWh consumption drops. Solar reduces the consumption-based energy charge; demand charges only improve if you flatten your recorded maximum demand through load management or, potentially, battery-backed peak shaving.

What is FSA/FAC on my bill?

FSA (Fuel Surcharge Adjustment) and FAC (Fuel Adjustment Cost) are riders that pass through changes in the discom's power purchase costs, billed separately in ₹/unit. In Uttar Pradesh the equivalent is FPPAS, published monthly on the UPPCL tariff page.

How do I calculate my blended rate?

Take twelve months of bills, add up every rupee payable (energy, fixed, duty, riders) and divide by total kWh consumed over the same period. The result is the effective rate your solar savings should be modelled against — not the single-month headline energy charge.

Is exported solar power credited at the retail rate?

Typically not. Under net-billing or banking arrangements, exports are usually credited at a feed-in rate below the retail energy charge. That is why plants sized for daytime self-consumption almost always deliver better savings per kW than plants sized to maximise export.