The heat pump water cost per year can vary depending on several factors such as the energy efficiency of the unit, the local electricity rates, the hot water usage patterns, and the climate conditions.

Heat pump water heaters are known for their energy efficiency and can provide substantial savings compared to traditional heat pump water cost per year. On average, a heat pump water heater can save up to 50-60% on electricity bills.

To estimate the cost per year, you can consider the following steps:

1. Determine the unit's energy consumption: Look for the energy consumption rating of the heat pump water heater, usually provided in kilowatt-hours (kWh) per year. This information can be found in the product specifications or obtained from the manufacturer.

2. Determine the local electricity rates: Check your electricity bill or contact your utility provider to find the cost per kilowatt-hour (kWh) of electricity in your area.

3. Calculate the annual energy cost: Multiply the energy consumption of the heat pump water heater (in kWh) by the electricity rate (in INR per kWh). This will give you an estimate of the annual energy cost for operating the unit.

It's important to note that the cost per year can vary depending on factors such as the number of occupants, hot water usage habits, and the climate conditions. For example, in colder climates, the heat pump may need to work harder to heat the water, resulting in slightly higher operating costs.

Overall, hybrid heat pump water heater to operate are known for their energy efficiency and long-term cost savings. By estimating the annual energy cost based on the factors mentioned above, you can get an idea of the operating expenses for a heat pump water heater in your specific situation.