For thousands of households, installing rooftop solar was expected to bring substantial savings on monthly electricity bills. Instead, many consumers are reporting unexpectedly high-power bills, raising concerns over how rooftop solar systems are being billed and whether the financial benefits match expectations.

The issue has come into focus in Nagpur, where several rooftop solar users claim their electricity bills have remained high despite investing significant amounts in solar installations. Many consumers say they expected their monthly bills to reduce sharply after switching to solar but were surprised to continue receiving sizeable bills.

The energy experts emphasise that the installation of rooftop solar does not necessarily mean zero electricity bills, as the final bill payable will depend on various considerations, such as the capacity of the solar installation, electricity usage in the house, net metering policy, fixed costs charged by the distribution company, power consumed from the grid during non-solar periods. The homes that generate more electricity than their consumption might still pay fixed network costs and other fees.

The issues raised have sparked new conversations on consumer awareness than on the technology being used. Experts in the industry claim that many landlords set up their rooftop systems thinking that they would pay "zero bills," but do not comprehend the concept of net metering. With the system, consumers get paid for the excess power supplied to the grid, although it only covers the cost of energy and not the fixed fees, tax, or any other statutory costs.

The Indian government is actively promoting rooftop solar panels through its residential solar scheme to encourage clean energy and help households reduce their electricity bills. India has also set a target of achieving 500 GW of non-fossil fuel-based power capacity by 2030. Rooftop solar systems also reduce pressure on the electricity grid by generating power close to where it is consumed.

A regular solar power plant with a capacity of 3-5 kW in residential areas would produce about 12-20 units of power per day in good weather, but power generation becomes very low during cloudy days and in rainy and winter seasons, thus making more reliance on grid power inevitable.

Experts also note that consumer savings depend heavily on matching system capacity with actual household consumption. Oversized systems may generate excess electricity that receives lower compensation under some state policies, while undersized systems continue to rely significantly on grid power. Poor system maintenance, dust accumulation on solar panels, shading from nearby buildings or trees and inverter performance can further reduce electricity generation over time.

Consumer associations have recommended that there is a need for transparency in regards to saving, billing procedures, and net metering from distribution companies and solar installation companies. They recommend that the installation companies give accurate estimates that are based on consumption habits and not just zero bills for their services.

With the continued growth of India’s rooftop solar industry, the latest grievances have brought into focus the need for enhanced consumer awareness, better billing practices, and increased transparency regarding the accounting of electricity generated by rooftop solar panels. It is the opinion of the experts that greater awareness about economics of rooftop solar power will play a vital role in this regard.