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0:00 Introduction
2:18 PCBWay PCB (Pulsatrix EV Simulator)
4:16 PCB Assembly and Soldering
6:10 How EVSE and EV communicates
10:29 CP control with the Ohme Home Pro
13:43 Ohme Home Pro Teardown
21:30 Next Steps
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#ElectronicsCreators
Just an FYI, that IR sensor is for chassis intrusion. Just got a "Your device may have been tampered with" alert on my phone from the app. Still works though but you can be sure it's logged in their database for future warranty claims. Glad I got mine dirt cheap :).
..or maybe just put a CT on the mains supply to the EVSE to detect charging. Tethered EVSEs often put the PP resistor inside the plug.
Very interesting video, thanks for sharing Steve.
Here in Queensland Australia we've got these Zellweger motors that pump 1050Hz down the line to change our off peak tariffs, however the newer smart meters have LTE-E or Nb-IoT to control & collect data. Recessim has put out some great videos how his Zigbee smart meters work with their gps! Maybe I'm just lazy, but surely you could get a cheap rs485 or wifi din mount meter?
I run the EV charger 'live' backwards through the inverter CT, so that the EV current isn't seen by the inverter and it never tries to supply power to it. Much simpler! No software. Foolproof! 👌
No idea what the HA integration is like with Solis, but the Ohme integration gives you all the information about it's status, so you could just make an automation from that. Easier than trying to cram an ESP32 in there :).
Seeing this, I feel slightly better about the Zappi I have! That responds to all of the faults you showed. I didn't try ventilation though.
GPS might be for timing. Time can be acquired from the network, but GPS is a useful backup option.
Time can be read via 4G, and wouldn't need to be that accurate. Location information is useful as pricing may vary based on the region or country you are in. Although, rough location should also be available via 4G as well. So I doubt its really needed in this case.
@@jaro6985 the point is to provide secondary timing information when 4G is not available. As they do time based pricing it is important to have an accurate clock.
@@kuro68000 A normal crystal would work fine for that. You can read their documentation where they talk about geo-location based services.
The EVSE PWM duty cycle is used by all units to denote their available amperage. It's a requirement to meet standards and is the only way to ensure that an EV doesn't try to draw more amperage than the EVSE is rated to.
Not entirely true. Some vehicles ignore the PWM in favour of higher level schemes, such as single-wire CAN (SWCAN).
@@m1geo Newer EVSE units may support more sophisticated communication methods, but my understanding is that all EVSEs must maintain backwards compatibility using PWM. In the video he states that some EVSEs don't use the PWM scheme and I believe that is incorrect.
Use HA. Using the octopus integration, it has a binary sensor to say if cheap slots are allocated. When it is, set the battery to charge or stay off.
I tested it, but it doesn't update with any off-peak slots other than the overnight one. Apparently the information is only aggregated the day before the bill is due with data from ohme
@@sdgelectronics what integration did you use? HACS Bottlecap Dave? Other people have managed to get it to work.
@@danielwalls5150It doesn't work with Ohme EVSE's because it's Ohme's system that controls charging, not Octopus. If you had a Wallbox Pulsar, then Octopus controls that and gives all the slots on the API.
@@sarahjrandomnumbersI’m pretty sure the Ohme system still needs a trigger from octopus. Therefore, it will be lead to the Binary Sensor triggering.
@@danielwalls5150Nope, it doesn't. Ohme works very differently to other integrations into octopus. It's Ohme that controls things, where as with others, it's octopus.
Interesting, It's a bit odd it can go into a fault condition and not report it or did I miss something please ?....cheers.
I wonder if there is some online page which notifies when cheap rate is active, or even a text alert you could capture. Might be worth asking Octopus.
It's done on an individual basis pretty much. If you change the target charge the slot will change
Any videos about reflow oven? Buy/diy etc
Hi, can you tell me how you got inside the unit. I have the same charger and the screen is dead plus it looks like condensation on the inside. I need to get in but unsure where to start. Did you just take the entire front panel off somehow?
GPS for time of day, perhaps ?
Octopus should have a public API that reports pricing. Maybe the reason they don't is that they don't want people to use cheap energy to change home batteries.
They do offer this on the agile tariff. But no word on this one just yet
They do. You can find your tariff code and query the API to see the charging slots you've been allocated.
@@m1geo I can't seem to get this to show up for Intelligent Octopus.
Such an overpriced piece of kit for whats inside....Shameful
They're only a safety mechanism in the simplest form, I guess in this case the price is supporting the back-end side of things. The price has shot up recently like most things.