The Z21 XL series is specifically designed to meet the needs of large scales (0, 1, 2, G) and combines the advantages and comfort of the Z21 system with high output power. The Z21 XL series differs from the Z21 mainly in the track output, which provides 6 amps of main track power. However, the track voltage is not adjustable and depends on the power supply used. Additionally, the Z21 XL series features a Z-CAN for a high number of Z21 XL boosters.