Quick Answer
To calculate the cost of a hybrid solar installation, consider the system's total capacity, including the solar array, inverter, battery bank, and other components. Determine the system's upfront cost, ongoing expenses like maintenance and replacement, and any potential savings through net metering. Finally, account for the battery's discharge cycle and the system's overall efficiency.
Hybrid Solar System Components and Costs
A typical hybrid solar system consists of a solar array, inverter, battery bank, mounting hardware, wiring, and monitoring equipment. The cost of these components varies depending on the system’s size and specifications. For example, a 5 kW solar array with a 10 kWh battery bank might cost between $15,000 and $25,000.
System Efficiency and Battery Selection
When selecting a battery bank for a hybrid solar system, consider the system’s discharge cycle and the battery’s depth of discharge (DOD). A deeper DOD can result in shorter battery lifespan and increased maintenance costs. For example, a 10 kWh battery bank with a 50% DOD might last 5 years, while the same bank with a 20% DOD might last 10 years.
Net Metering and Cost Savings
Hybrid solar systems can be configured to take advantage of net metering, which allows homeowners to sell excess energy back to the grid. The value of this excess energy is typically credited against the homeowner’s electricity bill. For example, if a hybrid solar system produces 2 kWh of excess energy per day, and the homeowner’s utility rate is 15 cents per kWh, the daily credit would be $0.30. Over the course of a year, this credit could total $109.50.
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