How do I choose the right size and type of home battery for my needs?

Capacity is a crucial factor when selecting a home battery system. The capacity of a battery is typically measured in kilowatt-hours (kWh) and represents the amount of energy it can store. Here are some key considerations for determining the appropriate capacity:

  • Electricity Usage: Allterra will analyze your household’s average daily electricity consumption to determine the peak energy demand during typical usage hours.  This will help to ensure the selected battery capacity can meet your needs.
  • Backup Power Requirements: If your primary concern is backup power during outages, Allterra will calculate the minimum capacity needed to support essential loads such as lights, refrigeration, and communication devices for the desired duration of backup. We also consider factors such as the frequency and duration of outages in your area.
  • Solar Integration: If you have solar panels or plan to install them, Allterra will consider the capacity needed to store excess solar energy generated during the day for use during periods of low solar production or at night. The battery capacity should be sufficient to store surplus energy to maximize self-consumption and offset grid usage.
  • System Sizing: Allterra works to ensure that the battery capacity is compatible with your overall energy system, including existing or planned renewable energy sources, inverters, and energy management systems. Optimal system sizing requires balancing the battery capacity with the power output of renewable sources and the energy demand of the household.
  • Future Expansion: Anticipate future changes in energy usage patterns or system upgrades when selecting the battery capacity. Choose a modular battery system that allows for easy expansion by adding additional battery modules as needed to accommodate future energy storage requirements.
  • Manufacturer Specifications: Consider the manufacturer’s specifications, including the depth of discharge (DoD), cycle life, and warranty terms, when evaluating battery capacity options. Higher capacity batteries with deeper DoD and longer cycle life may offer better long-term value and performance.

By carefully assessing your electricity usage patterns, backup power needs, solar integration goals, and future expansion plans, you can choose the right size and type of home battery system that optimally matches your requirements for capacity and functionality. Consulting with a reputable installer or energy advisor can also provide valuable insights and recommendations tailored to your specific needs.