Single phase line choke. Connected in the mains supply. This will help to reduce harmonics that are caused when the mains is rectified to create a DC link. They will also reduce the peak currents drawn by the inverter or other device. They also help to protect the input rectifier from some mains problems.
Buy single phase line chokes here.
Specification and prices below:
| Typical Inverter Power | Model Number | Description | Unit Price |
| 0.25kW, 0.4kW | CHO-S-6A0-LINE | 5.05mH 1ph 5.8A | £23.65 |
| 0.55kW, 0.75kW | CHO-S-9A0-LINE | 3.41mH 1ph 8.6A | £32.50 |
| 1.1kW | CHO-S-13A-LINE | 2.25mH 1ph 13A | £32.50 |
| 1.5kW | CHO-S-18A-LINE | 1.63mH 1ph 18A | £33.96 |
| 2.2kW | CHO-S-24A-LINE | 1.22mH 1ph 24A | £35.46 |
| 3.0kW, 4.0kW | CHO-S-35A-LINE | 1.46mH 1ph 35A | £55.00 |