In this article:
Overview
Pulse Width Modulation (PWM) is a widely used technique in electronics and digital systems to control the power supplied to electrical devices such as motors, LEDs, heaters, and more.
It operates by varying the width of pulses in a digital signal to adjust the average power delivered to the load.
Within zappi 1% increment of PWM, the EVSE (Zappi) is telling the EV that it can charge by an increment of 0.6 Amps per phase.
Where to find PWM
Access the Menu: Press the Menu button on the zappi (3-line button).
Navigate to Readings: Once in the menu, use the arrow buttons or touch screen to navigate to the "Readings" menu.
Readings - Page 1: Towards the bottom of the screen you will see Pilot (PWM).
PWM Range
zappi will operate a PWM range of 10%-53% (6A to 32 Amps per phase).
PWM To kW / AMP Chart
| PWM % | Current/A | Power/W @230V | PWM % | Current/A | Power/W @230V | |
|---|---|---|---|---|---|---|
| 10 | 6 | 1380 | 32 | 19.2 | 4416 | |
| 11 | 6.6 | 1518 | 33 | 19.8 | 1554 | |
| 12 | 7.2 | 1656 | 34 | 20.4 | 1692 | |
| 13 | 7.8 | 1794 | 35 | 21 | 4830 | |
| 14 | 8.4 | 1932 | 36 | 21.6 | 4968 | |
| 15 | 9 | 2070 | 37 | 22.2 | 5106 | |
| 16 | 9.6 | 2208 | 38 | 22.8 | 5244 | |
| 17 | 10.2 | 2346 | 39 | 23.4 | 5382 | |
| 18 | 10.8 | 2484 | 40 | 24 | 5520 | |
| 19 | 11.4 | 2622 | 41 | 24.6 | 5658 | |
| 20 | 12 | 2760 | 42 | 25.2 | 5796 | |
| 21 | 12.6 | 2898 | 43 | 25.8 | 5934 | |
| 22 | 13.2 | 3036 | 44 | 26.4 | 6072 | |
| 23 | 13.8 | 3174 | 45 | 27 | 6210 | |
| 24 | 14.4 | 3312 | 46 | 27.6 | 6348 | |
| 25 | 15 | 3450 | 47 | 28.2 | 6486 | |
| 26 | 15.6 | 3588 | 48 | 28.8 | 6624 | |
| 27 | 16.2 | 3726 | 49 | 29.4 | 6762 | |
| 28 | 16.8 | 3864 | 50 | 30 | 6900 | |
| 29 | 17.4 | 4002 | 51 | 30.6 | 7038 | |
| 30 | 18 | 4140 | 52 | 31.2 | 7176 | |
| 31 | 18.6 | 4278 |
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