For the first 6-12 months of a systems life you should check the following things:
• Measure and record resting/loaded voltage.
• Record ambient temperature where the batteries are installed.
• Inspect cell integrity for corrosion at terminal, connection, racks or cabinets.
• Check battery monitoring equipment to verify operation.
QUARTERLY
• Test Ventilation.
• Check for high resistive connections.
• Check cabling for broken or frayed cables.
• Verify Charge Output, Bulk/Absorption voltage of Inverter/Charge Controller.
• Check cells for cracks or indication of a possible leak.
• Check Ground connections.