Controller displays AL06 / Battery Voltage Low and generator will not crank

Safety first: Turn the controller to OFF and isolate AC and DC sources before working on the battery. Wear eye protection and gloves.

• Measure battery voltage: Using a multimeter, measure across the battery terminals. For a 12 V system, voltage below ~11.5 V indicates deep discharge; for 24 V, below ~23 V.
• Inspect terminals: Clean corrosion from battery posts and cable lugs with a wire brush. Tighten connections securely.
• Check battery charger: Locate the Kohler-SDMO battery charger (often 12/24 V float charger in the control panel). Verify AC supply to the charger and measure its DC output. If no output, check fuses and replace the charger if faulty.
• Recharge or replace battery: Use an external smart charger to fully charge the battery. If the battery fails a load test or is older than recommended service life, replace it with the specified CCA-rated battery.
• Clear alarm and test: After restoring proper voltage, clear AL06 on the controller and perform a start test.

Persistent low voltage after replacement suggests a wiring or charger issue that may require an electrician or technician.