Starting tomorrow, more than 100 cities across the U.S. will take part in the sixth annual National Drive Electric Week.

Scheduled for September 10 through 18, the event is composed of numerous local gatherings that celebrate and promote electric cars.

The EVgo charging network plans to join in on the festivities in a big way.

DON'T MISS: National Drive Electric Week kicks off one month from today

It will offer free electric-car charging to members throughout National Drive Electric Week.

Anyone with a valid EVgo charging card can plug in gratis at any of the network's roughly 1,000 charging sites, which cover over 50 metropolitan markets, EVgo claims.

That tally includes about 700 sites that offer DC fast charging, including charging stations compatible with both the CHAdeMO standard and the Combined Charging Standard (CCS).

NRG eVgo Freedom Station at Whole Foods Market, Fremont, California

NRG eVgo Freedom Station at Whole Foods Market, Fremont, California

Earlier this year, EVgo split from utility company NRG, which previously owned and operated the charging network.

In May, the newly-independent EVgo secured a significant investment from Vision Ridge Partners, and continues to receive some funding from NRG.

EVgo was spun off as part of a larger effort by NRG to cut costs and refocus on its core electricity-generation business.

ALSO SEE: ChargePoint, EVgo electric-car charging networks get more investment

Separated from NRG, EVgo is continuing its mission to expand electric-car charging infrastructure and court new customers.

It's hard to think of a better way to do that than participate in National Drive Electric Week.

It started in 2011 as National Plug-In Day, and continues to be run by advocacy group Plug In America, the Sierra Club, the Electric Auto Association, and various smaller local groups.

2016 Nissan Leaf SL fast-charging at NRG evGo Freedom Station, Hudson Valley, NY, Dec 2015

2016 Nissan Leaf SL fast-charging at NRG evGo Freedom Station, Hudson Valley, NY, Dec 2015

Organizers anticipate 223 events in the U.S., Canada, Croatia, Denmark, Hong Kong, Italy, and New Zealand.

Events include everything from electric-car rallies and test drives, to information sessions covering relevant topics.

MORE: BMW ChargeNow by EVgo electric-car charging rolls out in 25 cities, for a fee

A full list of events (searchable by ZIP code) is available on the National Drive Electric Week website.

If you've got an electric car and an EVgo charging card, considering making the trip to one.

You'll have a chance to chat with fellow enthusiasts, and to get a free charge as well.

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