Chinese electric carmakers increased their output in May, but sales of electric vehicles at home could continue their downturn in the month.

XPeng (HKG:9868) logged a 4% increase in its deliveries to 32,158 vehicles during the month, according to a Monday press release.

The electric vehicle company's deliveries in the first five months of the year are seen to reduce greenhouse gases by 2 million tons compared with internal combustion engine units, supplanting the equivalent of carbon absorption of 33.2 million young trees, the report said.

NIO's (HKG:9866; SGX:NIO) deliveries surged 62% to 37,705 vehicles in May, according to a separate press release.

Deliveries of the NIO brand comprised 20,013 units, while that of its ONVO brand reached 12,029 vehicles, and its Firefly brand reached 5,663.

Year-to-date deliveries for NIO reached 150,526, up 69% year over year.

Xiaomi's (HKG:1810) deliveries topped 30,000, EV news website CNEV Post reported, citing the automaker.

The tech company, which also made its foray into electric vehicles, did not share exact figures of deliveries, according to the news outlet.

SAIC Motors' (SHA:600104) joint venture with General Motors and Guangxi Automobile, saw global sales reach 126,087 vehicles, according to Chinese news site Internet Info Agency.

SAIC-GM-Wuling's Red Label saw sales of 45,224 units, while its Silver Label logged 46,026 units.

The rise in deliveries contrasts with the performance of domestic car sales as companies may have moved past its "golden era," Reuters reported separately Thursday, citing NIO CEO William Li.

Sales may not likely rebound despite strong exports, the report said.