OMG! You just opened a brain storm.
My cells (when they finally get here) and I have an Overkill BMS waiting... I read it has a programming API via Arduino... I could easily do what you're suggesting with fairly trivial programming on a ESP8266 device. As you pointed out above... could also do a counter of micro-cycles and do a clearing, full-charge every so often to wipe out any memory effect!
Oh! This could be fun!
"Grid Instability: Set/Clear" // Interesting these came up while off grid
"AC Frequency High: Set/Clear",
"AC Frequency Out Of Range: Set/Clear",
"EnchargeOnGrid",
"Multi Mode On-Grid",
"EnchargeGridModeFromEnpowerMMOnGrid",
"EnpowerControllerStopRelayPulses",
"EnpowerGridOperatingFull",
"EnpowerControllerStartOpeningNFTRelay",
"EnpowerGridConnectedMode",
"EnpowerControllerStartClosingMIDRelay",
"EnpowerControllerStopRelayPulses",
"EnpowerGridIsGood",
"EnpowerControllerStopRelayPulses",
"EnpowerVLoTrip",
"EnpowerControllerStartOpeningMIDRelay",
"EnpowerMicrogridMode",
"EnpowerAITrip",
"EnpowerControllerStartClosingNFTRelay",
"EnchargeOffGrid",
"Multi Mode Off-Grid",
"EnchargeSoCMaintenance : Clear",
"Islanding",
"EnchargeGridModeFromEnpowerMMOffGrid",
The Envoy can support up to 600 microinverters, so obviously all the power isn't going though it. But, it communicates to the inverters via ethernet over powerline, so a signal must be tapped to the power.
One of the things the Envoy can support is zero export. Since the power doesn't pass through it, the microinverters must have their power throttled via an API rather than frequency shifting. If so, with some reverse engineering, I don't see why the over-priced Envoy couldn't be replaced with a something akin to Raspberry Pi with an ethernet over powerline adapter. Might be important for Incrementally Adding AC Batteries too. First obvious problem is there are varying frequencies for powerline technology. Wonder if anyone has experimented with it?
YesDo you have Envoy?
Good question. I've been "assuming" UL1741, but it might not be. Perhaps @GXMnow knows? If not, a little experimentation might be in order.Does it linearly adjust output of each microinverter? Or individually enable/disable them to vary production for zero export?
I wish I could just view the same enlighten data straight from the Envoy. It is a pain that it must come from the internet. When my power was down, I lost internet after about 5 hours and Enphase installer Tool Kit also refused to let me look at the inverters. If I could have talked to them, I could have done the grip code change myself to get them back running. I had to connect the Envoy to my Cellular WiFi Hot Spot and have Emphase do it remotely. By the time we got it up like that, The sun was falling fast, and I only got about 1 KWH of charge. Even after the internet came back up, I still could not use the Enphase tool kit for about a day, then it just started working again. It makes no sense.Internet went out, with it lost Enlighten and the at-a-glance view of productions/consumption/SoC. Fortunately have Foghorn right? Nope... Not sure why it didn't work...guess I need to figure out what the certificate error is so I can debug it in Android studio. Hopefully I can duplicate the conditions.
You don't have to go through the internet; the important stuff at least seems to be available through the API... but yeah.... you need to DIY like foghorn.I wish I could just view the same enlighten data straight from the Envoy. It is a pain that it must come from the internet.
It is certainly subject to change at any time and without warning. The Enphase API responses are in JSON, so that makes it somewhat easier/protected. Haven't seen any of the stuff I use change in the first year that I can recall. What makes it fun/difficult is there's no guidebook to explain any of it. Some of what's in the API post I haven't seen documented anywhere else. If I could have debugged in Android Studio when the problem occurred probably could have found/fixed it.... my bad for not fixing android studio problems earlier (or their bad for messing it up in the first place depending on how you look at it ;-)....It is too complex and constantly changing...
When will cellular as backup to WiFi be fixed?
I always thought that the cellular with its 6 hour reporting was a backup to the wifi (with 15 min reporting).
But in looking through the forums it seems you have to pick one or the other and that cellular takes priority. Is that correct? If so, any timeframe on when it'll be fixed so one can work as a backup to the other?
Hi, Yes Cellular takes preference. As far as I know we had not had a request to have it as a back up with both connected. I will pass on the idea.
How long ago was the last post on that?Here's another interesting post asking about Grid Instability errors, they have an image from a Sense monitor showing a half dozen dropping out at a time. Have to keep a watch on this one to see what they say since I see those errors too.
How long ago was the last post on that?
Inverter | # Occurrences | Time |
---|---|---|
A | 3 | 3:19 pm, 9:19 am, and 10:27 |
B | 1 | 12:47 |
C | 2 | 12:41, 11:15 |
D | 2 | 11:17, 12:02 |
E | 2 | 11:11, 10:05 |
F | 2 | 9:20, 9:32 |