The key differences between the Bluetti AC200L and AC200MAX are in their power capabilities and features. The AC200L offers a higher output power of 2,400W, compared to 2,200W for the AC200MAX, and supports a higher maximum input of 2,400W (AC + DC/Solar), while the AC200MAX caps at 1,400W (AC + PV). Additionally, the AC200L operates at a lower noise level (≤50dB) and doesn't require an external charging adapter for AC charging, whereas the AC200MAX does. Lastly, the AC200L supports both Bluetooth and WiFi app control, whereas the AC200MAX only supports Bluetooth.