BEIJING, Aug 1 (Reuters) - Chinese electric vehicle maker BYD's global sales rose for a third straight month in July, with robust overseas demand continuing to help offset softer conditions in its home market.

Total sales rose 21.8% from a year earlier to 419,211 vehicles last month, according to Reuters calculations based on BYD's official statements on Saturday.

BYD's overseas shipments of passenger vehicles and pickups jumped 124.3% year on year to 179,841 units in July.