30W is just over 2A @ 14V with the engine running and about 2.5A @ 12V with the engine not running. All LED lamps have a relatively low current draw, well within the scope of the XT's charging system.

Have read of this thread for a breakdown of the charging/demand capacity of the alternator.

http://www.xt660.com/showthread.php?t=18294

The phone and sat nav will again only be an amp or two at the most when at full demand. A charger will only draw about 200-500mA if the device is fully charged.

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