TechFix Episode 3: Starting and Charging – What You Need to Know About the Energy Storage Systems on the all-new VNL

Presented by Volvo Trucks Academy

The TechFix video series delivers quick, practical tips to help technicians work smarter and repair with confidence.

Episode 3 illustrates how the single and dual energy storage systems manage energy flow between the ultracapacitor, living batteries, and alternator. It walks through the most common issues technicians encounter—parasitic drains, declining battery health, programming requirements—and clarifies what can be diagnosed in the bay versus what truly requires component replacement. The video also highlights proper sensor installation, correct reconnection order, calibration procedures, and the importance of using Volvo TechTool for full system verification.

The takeaway: Understanding how the Volvo VNL’s advanced starting and charging system manages energy, sensors, and calibration allows technicians to accurately diagnose issues, prevent no-start conditions, and reduce unnecessary repairs.

Click here to watch now.