OpenEVSE Charging Station any Users?

Discussion about EV/Battery charging infrastructure, Electric highways etc.
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lobster
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OpenEVSE Charging Station any Users?

Post by lobster » Tue, 05 Nov 2019, 13:02

I am need to purchase a 7kW EVSE for home and use on interstate trips.

There are some compact devices that would seem suitable for travelling and taking on board the vehicle.

This Khons product is available from the manufacturer in China or Re-branded from local suppliers at well over $1000.

https://www.khonsevse.com/product/porta ... charger-2/


On these Forum Pages I have noticed brief mentions of the American made OpenEVSE Charging Station. These are available as Kits or fully assembled units.

An Advanced Series - 32A IEC Type 2 Mennekes Kit Bundle is priced at US $459.00 plus freight & GST.

This seems ideal for me, as I hold an A Class Licence I could assemble it as a portable plug-in unit.

https://store.openevse.com/products/adv ... kit-bundle


Could anyone who has used an OpenEVSE product, please share their opinion on their experience?

Cheers
Last edited by lobster on Thu, 07 Nov 2019, 06:55, edited 1 time in total.

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Re: OpenEVSE Charging Station any Users?

Post by lobster » Wed, 06 Nov 2019, 16:48

Bump.

Forum searches for OpenEVSE show these members jonescg, doggy, brunohill, reecho, and seem to indicate possible assembly, use or ownership of an OpenEVSE charge station.

I would appreciate any feedback on these type2 capable chargers.

Cheers

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Re: OpenEVSE Charging Station any Users?

Post by reecho » Thu, 07 Nov 2019, 09:32

OpenEVSE has been brilliant so far. I have assembled a single phase version with 32A 3 phase plug for my Kona and also a 3 phase 32A version with long leads for a spare. They don't out of the box have DC offset protection but that can be mitigated with a correctly chosen RCBO in the supply. I use the firmware releases from here https://github.com/openenergymonitor/op ... /releases/ as they are correctly setup for EU limits. The Wifi function is great. You can use it in client or standalone mode. Kwh metering isn't entirely accurate as there is no voltage offset but it's reasonably close. Timed charging works with no issue.

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Re: OpenEVSE Charging Station any Users?

Post by jonescg » Thu, 07 Nov 2019, 09:54

I've been using @reecho 's OpenEVSE on the Prelude while I test it. Unfortunately it's the only EVSE which seems to work reliably with the Prelude conversion. So I will be inclined to buy it (or a similar single phase version) for leaving with Francess. The 3-phase cables are way too heavy for the job.
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Re: OpenEVSE Charging Station any Users?

Post by reecho » Thu, 07 Nov 2019, 11:31

Pics:
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OpenEVSE Single Phase.jpg
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OpenEVSE 3 Phase.jpg
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Re: OpenEVSE Charging Station any Users?

Post by lobster » Thu, 07 Nov 2019, 21:31

Thanks for your replies, Those OpenEVSE photos are great. Is that 3 phase unit squeezed into a smaller local box, I can't judge the dimensions of box and those thicker cables?

Chris, I will also require a single phase unit for my EV, so the convenience of lighter weight and more flexible cables should suit my needs well.

For portable use charging an EV at showgrounds, workshops, caravan parks etc, I suppose a long extension cord would be better than having a much longer input cable than the one shown in the top photo?

I need the Type2 socket but their cable is only 5 metres or 16.45 feet long and their J1772 cable is a more useful 25 feet. I think having the shorter output cable could possibly have the EVSE box lying on the ground to be accidentally damaged by pedestrians or other adjacent vehicles. Can anyone share their thoughts length vs convenience?

Is the 32A OpenEVSE with Type2 socket interface able to adapted to an input supplied from a 15A or 10A socket and then limit the output current to the EV? I believe the Khons EVSE has selectable output modes to achieve this.

Richard, an RCBO installed in the home switchboard is achievable, but when taking the openEVSE on trips would you be recommending to have a portable RCBO? Would it not require a ventilated and water resistant enclosure?

Regarding the firmware changes is that done over WiFi, USB or a special programmer?

Cheers

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Re: OpenEVSE Charging Station any Users?

Post by reecho » Fri, 08 Nov 2019, 07:22

lobster wrote:
Thu, 07 Nov 2019, 21:31
Thanks for your replies, Those OpenEVSE photos are great. Is that 3 phase unit squeezed into a smaller local box, I can't judge the dimensions of box and those thicker cables?

Chris, I will also require a single phase unit for my EV, so the convenience of lighter weight and more flexible cables should suit my needs well.

For portable use charging an EV at showgrounds, workshops, caravan parks etc, I suppose a long extension cord would be better than having a much longer input cable than the one shown in the top photo?

I need the Type2 socket but their cable is only 5 metres or 16.45 feet long and their J1772 cable is a more useful 25 feet. I think having the shorter output cable could possibly have the EVSE box lying on the ground to be accidentally damaged by pedestrians or other adjacent vehicles. Can anyone share their thoughts length vs convenience?

Is the 32A OpenEVSE with Type2 socket interface able to adapted to an input supplied from a 15A or 10A socket and then limit the output current to the EV? I believe the Khons EVSE has selectable output modes to achieve this.

Richard, an RCBO installed in the home switchboard is achievable, but when taking the openEVSE on trips would you be recommending to have a portable RCBO? Would it not require a ventilated and water resistant enclosure?

Regarding the firmware changes is that done over WiFi, USB or a special programmer?

Cheers
1) Yes it's a three phase unit. There is a 40A 4 pole Clipsal contactor squeezed in there.
2) With single phase Type 2 you can generally order any length you want. The Blue Mennekes cable (bought from Tesla AU) was 7.5m for reference. That seems like a good length for travel. Oh and the black cable on the 3 phase was salvaged from a dead Tesla destination charger. Yes they fail....A lot..
3) You can adjust current on the OpenEVSE from 6 to 32A in 1A steps. Very good for sites with lower quality supply. The Khons and other might only have 3 or 4 steps.
4) The OpenEVSE has GFCI included in the kits. While Making an inline RCBO is an option I haven't considered it yet.
5) Firmware updates are done via USB Programmer. The separate WiFi module gets updates via web gui.. https://store.openevse.com/products/openevse-programmer
OpenEVSE Dwelly.jpg
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Re: OpenEVSE Charging Station any Users?

Post by lobster » Fri, 08 Nov 2019, 15:43

Chris & Richard,

thanks for the good advice and installation photos.

I have ordered an Advanced Series - 32A IEC Type 2 Mennekes Kit Bundle with a 7.6m /25ft cable and a USB Programmer.

Cheers Steve

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Re: OpenEVSE Charging Station any Users?

Post by doggy » Mon, 02 Dec 2019, 18:42

I also built an OpenEVSE last July, so 17 months ago. It is a three phase unit in a bigger box (I still have the single phase box that came with the advanced kit if anyone wants one). I use it for single phasre 32A at home and three phasesat Showgrounds et al. I included a three phase RCD inside the box and also use their own fault detection so if plugged into an outlet with RCD, there end up being THREE protection devices not counting the car. I got the coloured display and am running the European three phase firmware. It has not missed a beat and is my "GoTo" charger. I am using the Eco Solar facilities whereby it tracks excess solar (I am using MQTT). I would like to mod the firmware a bit because you have to divide the kWHrs by 3 when running one phase. I would make Type1 be for 230V single phase and Type 2 (or auto) three phase. At the moment, Type1 assumes US style 120V.
One thing- there is a lot of RFI from the included power supply which affects AM radio reception (badly) in low signal areas. I added a suitable mains-rated capacitor of 0.47uF across the power supply and problem cured (and negligible impact upon power factor). When going for European Certification, they discovered something similar in the EU.
Cheers,
Dave

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Re: OpenEVSE Charging Station any Users?

Post by jonescg » Mon, 02 Dec 2019, 19:37

Good to know - I have just ordered the single phase version to go with the Prelude. At least this will work from any socket. I have also ordered a Type 1 to Type 2 muzzle adaptor so Francess can use Chargepoint and RAC chargers which are still all Type 1.
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Re: OpenEVSE Charging Station any Users?

Post by reecho » Mon, 02 Dec 2019, 21:01

doggy wrote:
Mon, 02 Dec 2019, 18:42
I also built an OpenEVSE last July, so 17 months ago. It is a three phase unit in a bigger box (I still have the single phase box that came with the advanced kit if anyone wants one)
I might grab the box Dave if it's no longer required. PM the details... :-)

Are you using OpenEVSE firmware or EMONEVSE firmware?. The latter has single and 3 phase variants. https://github.com/openenergymonitor/op ... /releases/

But yeah no autodetection. That's a hardware design limitation..

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Re: OpenEVSE Charging Station any Users?

Post by doggy » Tue, 03 Dec 2019, 07:06

I am using the Emon SW latest version.
D

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Re: OpenEVSE Charging Station any Users?

Post by doggy » Tue, 03 Dec 2019, 07:11

This is the unused box.
Will dig out photos of the 3Ph unit. As I already had a Type2:type2 cable, I mounted a Type2 socket on the box rather than have a flying lead.
Cheers,
Dave
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Re: OpenEVSE Charging Station any Users?

Post by doggy » Tue, 03 Dec 2019, 07:18

Herewith the 3ph box.
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Re: OpenEVSE Charging Station any Users?

Post by doggy » Tue, 03 Dec 2019, 07:19

Not showing 0.47uF as I added this later....

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Re: OpenEVSE Charging Station any Users?

Post by doggy » Tue, 03 Dec 2019, 16:13

The OpenEVSE box is STRONG!
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Re: OpenEVSE Charging Station any Users?

Post by doggy » Tue, 03 Dec 2019, 16:35

Lobster & Jonescg,
Just a note about the OpenEVSE. If the advanced one, the temperature sensor is on the LCD panel. If you wire it well, the only heat generating object is the AC:DC converter (aforementioned for RFI). If you use the box flat- as shown above- the heat of the converter artificially inflates the reading which on a very hot day and under extreme circumstances could lead to throttling of the charge rate. If you run the box vertically, things are much better. In extremis, put it upside down and vertical so the heat goes up and away from the LCD. I have operated it as in reecho's first photo and run on a 45deg day at 22kW AOK. But I did (another time) have it out in the open on a 45deg day pulling 22kW and had to invert it which reduced the temp. reading.
It has a lot of features, many already mentioned. One I like is that it connects to a WiFi AP and you can access it locally or remotely. If you are out in the bush, you can connect to its own internal AP and control it with your phone. I once had it connected to my hotspotted phone (which was in the car) and then I could check on it from the restaurant where I was having lunch (with another phone). The WiFi phone app is good.
Cheers,
Dave

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