Basics
14.7.16
Kapitel/Chapter 5: Basics - Seite/Page 29
5.7.1 Instructions for the starter battery for extended downtimes
Note: Information starter battery
Starter batteries
Self-discharge of batteries is a physical and chemical
process and cannot be avoided even if the battery is
disconnected
• For extended downtimes, the battery shall be disconnected from the genset.
• Charge battery regularly. Observe instructions of the battery manufacturer.
Depending on the battery type, check the acid level before charging and refill each cell up to the marking using
distilled water as necessary.
Modern starter batteries are typically maintenance-free.
Deep discharge will damage the battery and can render it unusable.
Keep battery clean and dry. Clean battery poles (+ and -) and terminals regularly and coat with acid-free and acid-
resistant grease. During assembly, ensure good contact of the terminal connections.
General limits for lead-acid batteries:
2.1 V / cell corresponds with full battery (charged).
1.95 V / cell corresponds with empty battery - recharge.
For a 12 V battery, the following applies:
- 11.7 V lower open-circuit voltage (battery empty), recharge battery.
- 12.6 V upper open-circuit voltage (full battery) - trickle charge full battery at 13.2 V.
For a 24 V battery, the following applies:
- 23.4 V lower open-circuit voltage (battery empty), recharge battery.
- 25.2 V upper open-circuit voltage (full battery) - trickle charge full battery at 26.4 V.
These values are based on a battery temperature of 20-25°C. Observe the instructions from the battery
manufacturer.
Note: Starter battery recommendation
Fischer Panda recommends:
• Install battery circuit breaker and switch to OFF on the
machine. (Cutting the battery circuit.)
• Secure the battery plus terminal close to the battery.
• Regularly check contacts for corrosion.
5.7.2 Measures for short downtimes
Short downtime (1 to 3 months)
• Measure battery charge status based on open-circuit voltage.
• During downtimes >7 days, disconnect battery (e.g. battery main switch to position 0).
• Check the battery within 2 months and allow the engine to warm up for min. 10 min.
• Fill fuel tank to 100% (level to full).
5.7.3 Measures for medium term downtimes / hibernation
Medium term downtimes (3 to 6 months)
