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Ask Enphase for a firmware upgrade to r06-v02.61.01.

MPP Solar Hybrid Inverter LVX 12KW WP That's a great price for a grid-tied split-phase 48V hybrid inverter.

Could be same or newer firmware, Enphase said anything below ...2.61 would not AC couple and changing grid profiles would not make a difference. Enphase needs to increase micro inverter sales and fend off competition by Hoymiles and AP Systems. While successful IQ8 AC coupling may cut into sales...

Finally, I got a response to an Enphase ticket after a few rounds of communications and Enphase has a new IQ8+ firmware version r06-v02.61.01 supporting AC coupling with IQ8 inverters. They upgraded 38 IQ8's last night and I tested AC coupling this morning. IQ8+ AC coupling with a single XW-Pro...

Performed a test with a 12 IQ8+ sub-array and grid profile "IEEE 1547 2018" late Wednesday with only 80W of solar. AC coupling started, but I noticed the often reported flicker - small variations in XW voltage - where the XW-Pro oscillates between charging and idle. There wasn't enough PV power...

Occasionally, I have IQ8's not reporting or producing less then neighboring inverters on same model panels with no difference in solar irradiance. Sometimes, the reduction in production corrects itself after 2-3 days, sometimes I remove the inverter, take it offline, test it and re-install it...

Case (1): No loads and Case(2): 1.2 kW resistive load, no difference in AC coupling. Enough battery charging reserve (80% SOC) to prevent any type of power curtailment, frequency constant at 60 Hz. Trying to develop a good incremental test plan, that's why this setup is a totally separate system...

You're on to an interesting behavior of IQ8 inverters. When I connect 14 IQ8's to XW-Pro off-grid, they start producing with a suitable grid profile but at a reduced rate, less than 50% of PV source. How would they know to produce less? Impedance checking? Hoymiles inverters produce up to PV...

"CA Rule21 201902 for Outback Radian". Sorry, I posted the results on a private thread. 14 IQ8+ inverters connected to off-grid XW-Pro. Inverters consume about 6W from XW grid, 0.02 power factor, but they never come online to produce power. The increased hum in the XW-Pro indicates some...

Off-Grid Testing with Grid Profile: IEEE 1547 2018 for IQ8's Changed grid profile back to IEEE 1547 2018. Array of 14 IQ8's starting after 4 minutes to perform anti-islanding checking, consuming about 0.6 W total, quite different from the Outback Radian profile. Then they come online but produce...

CyboEnergy had gridforming micro inverters for several years. But not a combination grid-tied plus micro-grid forming like Enhase.

Just tried to AC couple the 14 IQ8's with AC coupling switched off in the XW-Pro. They still do not start producing power. Will try to test other grid profiles, but Enphase profiles are limited by region and I do no see a profile for "sunnyboy".

Interesting question and helpful link. Enphase: When I connect 2-3 IQ8+'s to an XW-Pro, they start producing power in off-grid mode after 5 minutes. When I connect a live array of 14 IQ8+'s they never start producing, independent of the PV power available. There is no measurable frequency shift...

I re-installed the latest firmware for the InsightHome gateway and can modify the grid profile properties as shown in the AC coupling guide and the latest XW manual. Changed p(f) PreDisp to a 10 point non-linear curve starting at 60.1 and stopping at 62 Hz. Also changed response delay from 1...

You're correct, the XW is raising frequency and voltage to stop micros from producing, anything is allowed in off-grid mode, no regulations to be complied with. This is not a violation of the on-grid behavior according to the selected grid profile. The 62 Hz applies only to on-grid. The...

Would like to do this, but there are no controls in InsightLocal and XW-Pro firmware to do this, or I don't know where to find them. IQ7's are much faster than IQ8's responding with a ramp down to a raise in frequency.

Exactly! The XW-Pro has a built-in auxiliary output port that can be triggered by a battery voltage at a defined level. This is exactly the approach that works in Franklin WH, EP Cube and other inverters. When Sol-Ark AC generator is tied to SOC, the relay will open and disconnect the PV array...

Sunny Island: That would be a great test, having an inverter where the FW shift up ramp can be specified, especially the end point and a ramp slope or gradient over time.

I thought so too. But when the grid-tied ESS inverter with full PV production and no load other than backfeed into the grid suddenly gets disconnected from the grid, the PV current needs a place to go. Inverter raises the frequency, beyond 62.5 Hz and the IQ8's shut down for the rest of the day...

Correct, there are no rules and regulations how the off-grid inverter has to perform in an off-grid micro-grid config. I do not know any ESS inverter that has a configurable off-grid AC coupling profile, separate from the grid-tied profile. Too complicated, why detect the change in frequency if...

Would like to know how Lux Power or EG4-18kvp can be AC coupled with IQ8's and handle on-grid to off-grid transition. - FW enabled or disabled ? - connected to generator input or load side ? - wait for full PV production, switch all loads off and see how fast the IQ8's can be shut down without...

I have limited time and a main job to earn money, so testing will be in small incremental steps as I have spare time. Grid Profile: IEEE 1547 2018 for both IQ8's and XW-Pro The XW-Pro AC coupling guide you've cited is out-of-date and the p(f) configurability is no longer available in the...

I don't know any successful IQ8 AC coupling with FW power curtailment. IQ 8's can be AC coupled with FW off, constant 60 Hz, and using the generator relay for PV on/off. But then you loose the generator port for additional gas powered backup. I know an installer in Canada who got IQ8's to work...

Will respond to your specific questions later. To the best of my knowledge, no one on this forum has successfully AC coupled IQ8+ inverters with FW or similar power curtailment. IQ8's can be AC coupled with a hard on/off PV relay. This what Franklin WH, EP Cube, Qcells QHOME, Sol-Ark using the...

I did not think or say that this would be better, it is just an observation what the XW-Pro does off-grid. And it is perfectly ok to raise the frequency to get the micro-inverter to stop producing. There is a major difference for an XW or similar ESS inverter to be grid-tied and required to be...

Hoymiles inverters (HMS-700-2T) AC-couple flawlessly with Schneider XW-Pro inverters. Have a small 7 x 250W-panel off-grid system for the initial testing. Will expand it to 4.5 kW over the weekend and perform more in-depth testing. Finding lots of interesting details and differences between...

Enphase has always supported TOU with battery charging from PV and discharging for self-consumption on the IQ gateway, no need for the IQ system controller. An IQ gateway (aka Envoy communications gateway) is always required for an Enphase micro-inverter system, so you just need to add AC...

Let's focus on the objective of this thread. IQ8's can only be AC coupled with hard PV on/off by non-Enphase ESS systems and Enphase ESS systems do not tolerate other inverters on the Enphase micro-grid. Enphase has new 5P batteries that are priced around 3k, they are great for TOU because...

A 200A main breaker will trip on thermo above 160A, and magnetic (short or major overload) above 200 A, the details including timing are in the Breaker Trip Curves. Depends on the inverter and the manufacturer specs for the grid disconnect relay. Make/brake is 150A for the 2 relays in the Lux...

The grid disconnect relay in the hybrid grid-tied inverter can ark if the inverters are stacked and the stacked power (either grid or backup) exceeds the break/carry current of the relay in a single inverter. Parallel stacked relays are limited by the break/make/carry limits of a single relay...

Yes! That's why I won't consider the Schneider BCS, you can do this with an external contactor. But it is recommended for stacking more than 2 XW Pro's, otherwise you'll have relay arcing and stucked MID relays. The 200A rated relays in Sol-Ark and Lux Power are rated for 200A carry, not...

Anywhere from $800 (Fox ESS), $1600 for Franklin aGate, $2000 for Enphase IQ System controller to $3200 (Schneider SE BCS). But here is the catch: you cannot mix and match MID panels! You need to buy the whole package. Would like to see a generic MID panel with open MID and PCS control standards.

Your right on, if you need a 12 kW backup inverter like Sola-Ark (up to 15 kW), Lux Power or EG4-18kvp and if your grid and backup lines are close to the main panel, this will be sufficient. You have losses for grid-tied operation in the lines from the main panel to the inverter back into the...

Microgrid Interconnection Device, MID Device aka automatic transfer switch or anti-islanding relay. Not sure who used the term first, probably Enphase. Hybrid AIO and backup inverters all the way back to Trane and Xantrex XW have this relay between the grid line and the backup line.

All MID panels I'm familiar with require additional CT's in backup-panel configuration to be placed on the grid input to display grid consumption, support export control/limits and support TOU management. Here is the SolaX manual, see last page, additional CT's. There are connectors for these...