DTA is still giving free/discounted charging for both CHAdeMO and CCS. However, depending on time of day, depending on location, the discount could be 0, 25, 50, 75 or 100% off: https://drivethearc.com/congestion-pric ... er-3-2020/
. Free tends to be at night until maybe 6 am or so. For some chargers near/sorta near me, free starts at 10 or 11 pm. For one of them (not close), it starts at 8 pm, usually.
There are at least 2 DTA chargers that are free at any time but with reservation only. Sometimes, they give out special 100% discount promo tickets for answering surveys that might show up.
I've sucked down over 350 kWh of free CCS juice from them. Oddly, when using the free reservation charges, the transactions ($ and kWh dispensed) don't show up in the EVgo app, so if one wants to track the # of kWh from those sessions, you gotta do it manually.
For non-reservation discounted/free charges, normally, the credit shows up in the EVgo app under billing transactions 15 minutes after the charging fee transaction. In some cases, it's taken longer. I'd give it about 1 day before contacting EVgo/DTA if you don't receive credit. They've always been good about crediting me if I contact them about this and they've actually screwed up and given me extra credit more than once, resulting in a negative balance. No, they don't owe me any $.