WHY DO FIRE ENGINES BATTERIES HAVE TO BE RE CHARGED FROM THE MAINS?

Fire engine batteries need to be recharged from the mains to ensure they are always at full capacity for emergency responses. During extended periods of inactivity, the batteries can discharge, and relying solely on the engine's alternator may not provide sufficient power for all onboard systems. Additionally, charging from the mains can help maintain the battery's longevity and reliability, which is critical for the safety of both firefighters and the public. Regular recharging ensures that all electrical equipment, including lights and communication devices, are fully operational when needed.