ChargePoint Introduces CT4000-Series Charger with Unique Power Sharing Option

JUL 30 2013 BY MARK KANE 22

CT4000 series charging station with Power Sharing option

CT4000-series charging station with Power Sharing option

CT4000-series charging station

CT4000-series charging station

ChargePoint recently presented its new CT4000 series of AC charging terminals with two J1772 plugs.

This latest product stands out with a unique Power Sharing function that allows a single 7.2 kW circuit to power a dual-port charging station. It works like this: if one car is connected it can use the full 7.2 kW of power. But when second car gets connected, both will charge at a 3.6 kW rate.

Why do this?  Well, this doubles the number of charging spots without increasing installation costs.

Pat Romano, President and CEO for ChargePoint said:

“The CT4000 Series changes the equation by offering more charging ports at every station while dramatically cutting installation costs. The CT4000 is truly a customer-centric EV charging station. Its creation is the result of understanding the needs of both drivers and station owners alike.”

But if you don’t want Power Sharing, then you could order a 2 x 7.2 kW version or the 1 x 7.2 kW version.

The ChargePoint CT4000 includes Clean Cord Technology and a color LCD screen:

“Clean Cord Technology – a self-retracting, maintenance-free, ultra-lightweight cord management system, which is a standard feature on all CT4000 Series models to make charging an easier and more convenient experience.”

“In addition, the CT4000 Series offers a first-ever customizable video feature on a color LCD screen allowing station owners to run video content of their choice through ChargePoint’s cloud service. Station owners can further customize their CT4000 series charger by using the built-in signage feature (also standard with all models). The interactive instruction video for the CT4000 is consumer-friendly and available in English, Spanish and French.”

According to the press release, ChargePoint now has over 12,000 charge spots installed with over 70% market share of networked public charging stations and hundreds of outstanding order to fulfill.

Categories: Charging


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22 Comments on "ChargePoint Introduces CT4000-Series Charger with Unique Power Sharing Option"

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Well, this would be unique, except that the Tesla Superchargers are already using a variant of this.
Each charger supports 2 parking spots on a first-come-first-served basis up to the charger’s limit of 120kW (90kW in the old ones).

Car 1 plugs in and charges at full rate (NOM, NOM, NOM).
Car 2 arrives and plugs in. Car 2 now gets a trickle (nom).
Car 1’s charging tapers (NOM, NOM) so Car 2 charges faster (NOM).
Car 1’s charging tapers more (NOM), so Car 2 chargers even faster (NOM, NOM).
Car 1’s charging finishes to a trickle (nom), so Car2 charges at full rate (NOM, NOM, NOM).
Car 1 leaves.
Car 3 arrives and takes Car 1’s slot (nom)
Car 2 tapers (NOM, NOM) then (NOM) and Car 3 charges faster (NOM) then (NOM,NOM).
Car 2 finishes (nom) so Car 3 goes at full rate (NOM, NOM, NOM).

(Thanks to the “Tesla and a Volt go to the mall” cartoons we know that cars say nom while charging.)

NOM = The sound made when eating something (or someone) — Urban Dict.

Sounds like the difference is the first-come-first-served nature of Tesla’s chargers. That might work for the superchargers, where you are plugged in for a short time and the charge rate is ramped up and down as appropriate. So this particular use is still unique.

My concern would be that all chargers are pay-by-the-hour (at least around me). So if I’m charging away at 7.2kW and suddenly another EV comes along, I’m effectively paying twice the price for the energy now. We really REALLY need to move to a pay-per-kWh model…

Or just free chargers like all the ones around me 🙂

Looks like the BMW i3 with the 7.4-kW on-board charger would take *full* advantage of this unit as long as there was not another car there (PiP, FFE, LEAF, etc).

Too bad Chargepoint doesn’t expand their business model to include a usage based cost. The fixed monthly charge for inclusion in their network is not worth the capital investment. I wouldn’t be surprised if Tesla begins to branch out into the J1772 charging arena with low cost charging fees (.50/hour).


Are you talking about cost for the person who operates the charger or the EV driver?

I’ve emailed ChargePoint and was told the chargers are franchised. The ‘owner’ decides how to bill. In central Texas i’ve come across the free City ones, $2/hour, and $.50/kwh ones, all with the CP logo.

How about a 4-port 120V J1772 charging post for Airports and similar with 25′ cords to power charging of four cars from one post – or overhead “arm”.

Glad to see this released, unfortunately, I needed it about 8 months ago! I would have liked to run one 40A circuit instead of two.

I’m hopeful that at some point down the road they can up this to a single 100A circuit to run both chargers at 10kW when cars support that level of charging – likely when we start to see more 200 mile EVs on the market (4 hours for 100 miles or 8 hours for a full charge is fine for overnight or workplace charging for those longer range EVs).

Sounds like you could upgrade and get two of these without running new wires 😉

I should have said two 20A circuits. Which is what we run.

And they said nothing about their current price model, which is per hour regardless of the power used. So A second car comes, and you get to pay twice the rate you thought you were getting when you plugged in.

Chargepoint needs to think. A lot of their use models don’t make sense right now.


They do have some chargers that are a fixed price per kWh. I live in MN and the Chargepoint chargers at the Mall Of America are something like 49¢/kWh.

Which by the way is pretty high. Here in CA, we get 13 cents, with 4 cents if you jigger the rates and charge overnight.


Scott, ChargePoint don’t set pricing, the station owners set pricing. Know before you post.

How reliable will the new CT4000 EVSEs be?

The deployed CT2000 series are failing all over the place. Most failures are with the lock release solenoid for the J1772 plug preventing one from charging. Other failures are with connectivity and software bugs. We’ve also seen oxidized ground prongs in the J1772 plug causing ground failures. Unfortunately there is vandalism as well.

The latest failure I discovered is with the 120V outlet door. Once the port is energized the door would not lock in place and anyone can lift it, interrupt the charging, unplug your 120V EVSE and walk away with it.

It looks like the CT4000 series do not offer 120V charging. The gravity cord management seems cool, but how long does it last if not maintained before it fails?

With the deployed base getting larger, which is really great, it is becoming more critical to be able to keep it in working order and to resolve issues in a timely manner. Can the charging networks do it?

OK, let’s just standardize on 4kW wireless charging 🙂

I was thinking more of a deployable mast with a tracking PV panel and/or a wind generator, but ok 😉

I really expected a EVSE with the model number CT4000 to have four charging cables. That seems like the logical solution considering how parking lots are arranged. 100A across potentially four parking spots seems like it would be an economical solution.

And why doesn’t the J1772 protocol include the ability to recognize a charging account. I find it extrememly annoying that I need to plug in my car AND wave a fob to tell it who I am.

I’ll have to check home depot in a few months to see what rediculous amount they want for the color tv set/ contactor combo. I don’t have the right facilities to get these things to work anyway…

I like a public charger where i just hook the thing up and it works. These designers have apparently never used a gas pump at a convenience store in the past 20 years.

“These designers have apparently never used a gas pump at a convenience store in the past 20 years.”

the last 3 gas stations I went to all had TV’s on them….so what’s your point?