Maintenance

Home battery systems are designed to be “fit and forget” technologies with very few moving parts. However, performing a few simple checks and ensuring the system is in the right environment will help you get the maximum possible lifespan from your investment.

1. Temperature Control

Temperature is the single most important factor in battery health.

  • Operating Range: Most lithium batteries work best between 10°C and 30°C.
  • Cold Weather: In very cold temperatures (below 5°C), batteries may charge or discharge more slowly to protect the cells.
  • Extreme Heat: Avoid installing batteries in areas that get very hot (like unventilated lofts or south-facing garden walls), as heat accelerates the chemical degradation of the battery.

2. Firmware Updates

Modern batteries are controlled by complex software (BMS - Battery Management System).

  • Why update: Manufacturers regularly release updates to improve efficiency, add new features, and enhance safety.
  • Automatic updates: If your battery is connected to the internet, these updates usually happen automatically. Ensure your battery’s Wi-Fi or cellular connection is stable.

3. Physical Inspection

Once or twice a year, you should perform a visual check:

  • Casing: Ensure there are no signs of damage, corrosion, or bulging.
  • Cabling: Check that all visible cables are secure and haven’t been chewed by rodents (especially in lofts or garages).
  • Clearance: Ensure no items have been piled on top of or against the battery. Most systems need a small amount of clearance for air circulation to prevent overheating.

4. Monitoring the State of Charge (SoC)

Try to avoid leaving your battery at 0% or 100% for very long periods.

  • The “Sweet Spot”: Like electric vehicles, lithium batteries are happiest between 20% and 80% charge.
  • Deep Discharge Protection: Most modern systems have a “reserve” level (usually 10%) to prevent the battery from ever truly reaching zero, which can damage the cells.

5. Professional Health Checks

While an annual service isn’t strictly required for many warranties, we recommend a professional inspection every 3 to 5 years. An accredited installer will check:

  • The integrity of the internal cells.
  • The performance of the inverter and cooling fans.
  • The tightness of all electrical connections.

Note on Life Cycles: Every time a battery is fully charged and discharged, it counts as one “cycle.” Most quality batteries are rated for 6,000 to 10,000 cycles, which typically equates to 10 to 15 years of daily use.