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Thanks a lot for the link! The 112A200 relay is a 1-pole 200A 12V relay, with a 50A make/break rating there is no 220A max break! Where do you get the 220A max break rating from? If you break/make 200A with this relay it won't last very long! And it looks like the grid and backup terminals are...

Hoymiles has an impressive lineup of ESS inverters for non US markets. Check out their datasheets, installation manuals, user manuals and other documentation at Hoymiles documentation. ESS Inverters: - single phase and 3-phase inverters, split-phase inverter for US market (only HYS-LV model) -...

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...

Enphase grew in the early days by strong support from self-installers. Lately, they make it increasingly difficult for self-installers to purchase, install and commission Enphase battery backup systems. Cell Modem A Cell modem is required for commissioning. There is absolutely no technical...

The grid-to-load AC pass-through relays in the SolArk, the MID relay in an Enphase IQ controller, the FranklinWH aGate MID relay, the similar relay in a Tesla main panel and the Schneider XW Pro AC disconnect relays on the AC board are all required primary MID disconnect devices and are under...

They take the whole pie! The cell modem includes a 5-year data plan with the cell provider. Maybe they get a kick-back from them? And what do you get from the cell modem? 4 updates per day, otherwise the data plan would cost a lot more. It is even worse: Enphase insists on the installation of a...

A generator must be inverter-based otherwise the micro-grid is not stable enough for any AC coupling. Backfeeding power into the generator will most likely damage or kill the inverter board or set it on fire and is not permitted in many jurisdictions. I am not up-to-date with inverter-based...

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...

Inverters can be AC coupled without any power curtailment. All you need is a PV relay that closes when the backup battery can accept charge and it opens when the backup battery is full or at a high SOC. This is how FranklinWH backup works by design. SunGoldPower IP6048 6kW can AC couple too, but...

Thanks so much for your dedication to find a solution, hard work trying different solutions and spending incredible amounts time to figure it all out and your patience when things did not work. IQ8's are know to be very finicky and difficult to AC-couple with FW, VW, VV but they work fine in a...

There is a recurring theme in all the AC coupling feedback reported on this forum: anti-islanding by measuring grid impedance. 50 KVA utility transformers have a very low impedance, transformer-based inverters like XW have medium impedance with the 60 Hz toroidal transformers at 6.8 KVA, Enphase...

38KW of PV is about 152 A at 250V. Can we have a few more details on the current config? A 400A single load panel or 2 x 200A separate panels? Do they have plans to add any backup? Never, now or later? Can they sell excess PV power to the grid? Looks like the system will be grid-tied, so you...

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...

After waiting since January for a fix and countless hours trying to get it to work, Schneider XW Pro closed loop ModBus communications with 2 EG4 LL(V2) is finally working! Different EG4-LL(V2) DIP switches requiring different firmware and even incorrect mounting of DIP switches in the I/O board...

Great comment on XW and FX inverters. The problem with Schneider SE is that they don't sell parts anymore. Only 3 authorized repair centers in the US can get salvaged XW units and butcher them for parts that they use to repair XW's. If you have spare XW parts, XW's are easy to fix in place...

Fascinating Todd! Enphase AC batteries are underpowered - especially the 4 x IQ8X's - and overpriced and the total power is limited to 64A ESS into the IQ system controller. But a single 3T is good enough and sufficient to form a microgrid. I've always wondered when someone clever would come up...

It's cost. An MPU upgrade from 200A to 400A is prohibitively expensive, new 400A feeder lines plus the neutral, new 400A main breaker, and basically the same number of breaker slots in the new 400A panel as in the old 200A panel. It's much more economical to upgrade the service entry from 200A...

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...

Hoymiles should give Will an inverter for testing!

All micro-inverter internal data plus PV production and Grid consumption data is collected in the IQ gateway aka Envoy and then transmitted into the Enphase cloud server. Enphase is in control of the system, it owns and controls the data, the end-user does not! Enphase could easily develop a...

Please check the 6-slot DIP Switch settings for the master! If not set to ID:1 for the master, the Schneider InsightHome MOD BUS scanner will not find the BMS! EG4-LL(V4) 6-slot DIP Switch Settings

Changing the IQ8's to IQ7's may not solve the AC coupling problem because Enphase can change the implementation of the IQ7 grid profiles at will. Switching XW Pro AC Coupling Off: disabling AC coupling in the XW Pro is a test worth the effort to see if the IQ8 problems persist. The XW Pro may...

Hedges: I wouldn't be commenting here If I didn't wear a seatbelt 28 years ago!

Either way, down to the AC combiner or you could split it in the roof junction box/panel/deck into individual class 1 powerlines and class 1 UL approved 600V twisted signal lines that you can run in the same conduit or 2 separate conduits. But you cannot run class 1 and class 2 in the same conduit.

You are missing the disconnect relay in the AC1 line. There a 4 + 1 relays: one for each leg in the AC1 (grid) line, one for each leg in the AC2 (gen) line and a NFT neutral disconnect relay on the AC (out) N line for preventing imbalance current via the toroidal transformer when grid connected...

These systems have been available in the non-US market for some time. Like Tesla Powerwall 2, AC coupled ESS systems are targeting the retrofit ESS market while AIO inverters like Sol-Ark, Lux Power, EG4-18kvp are great for new installations with HV PV. One unique recurring feature is the MID...

Do you want to install it yourself or have a certified installer do this? In case you do it yourself and settle on Enphase, you need to take all Enphase courses and get certified, time consuming, especially the last part where you have to design a backup system and submit it for review ...

The IQ gateway needs at least 80V AC on L1 and N to startup. Tried DC up to 30V does not work, would need DC up to 80V but don't have a DC power supply to test it. Have a modified IQ gateway that can run off 5V DC power and can stay on all the time! In Sunlight-only backup, the IQ8's need to...

Want to do the same, AC couple Schneider XW's with IQ8+ and try other AC coupled inverters too. IQ8+ AC coupling works well with FranklinWH, but they use hard PV On/Off via a PV disconnect relay instead of FW, or VW or VV . Approaching it differently to find out what works. Have a test setup...

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