Top Metrics to Know Before Choosing a Home Battery

What Are the Key Metrics You Should Know Before Buying a RESS?

Before investing in a home battery, here are the essential metrics every homeowner should understand:

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1. Capacity (kWh)

What it is: The total amount of energy the battery can store.
Why it matters: A higher kWh means your system can power your home for longer periods. Consider your daily energy consumption to find the right size.
Example: A typical LEOCH wall-mounted home battery , the LW51.2-100, has a storage capacity of 5.12 kWh. One fully charged LW51.2 can keep essential appliances running for about an entire day during a blackout.

2. Power Output (kW)

What it is: The rate at which electricity is delivered.
Why it matters: Determines how many appliances your battery can power simultaneously. For example, 5 kW can run several lights and a refrigerator, but may not support high-demand devices like HVAC systems all at once.

3. Depth of Discharge (DoD)

What it is: The percentage of the battery's total capacity that the battery is discharged during use.
Why it matters: A higher DoD (like 80% or 90%) means you can use more of the battery without affecting its lifespan.

4. Cycle Life

What it is: The number of charge/discharge cycles a battery can handle before its capacity degrades.
Why it matters: A longer cycle life (e.g., cycles) means more years of use and better ROI.
You might see something like " cycles @80%DoD" on the datasheets. But what does that mean?
Let's break it down: