How many volts does an AED deliver?

The AED delivers a shock energy, with units of joules (see the related link). There is not a direct conversion from joules to volts. I have read that the AED has the capability of about 1000 volts.

For a comparison of some AEDs and their energy output, see the other related link. An AED with child pads delivers less energy per shock; as low as 50 joules whereas some for an adult will deliver 360 joules or 400 joules.