Mixing IQ7RMA kits with D380 inverters anyone else run into this?

[wattwanderer761]

I took over an older solar array at my brother's farm some time ago, which primarily uses D380 microinverters. I've been replacing the faulty units with Enphase IQ7RMA kits, but I've noticed that whenever I mix the two on the same string, the remaining D380s stop sending reports. Enphase has sent me full replacement kits whenever this happens, but it's become a bit of a recurring issue

Has anyone else experienced this problem when mixing the old D380s with the newer IQ7RMA kits? I'm curious if this is a known issue or if it's something specific to this particular setup

 

[WattsUpDoc]

Absolutely, that's a recognized problem. When you mix D380s with IQ7RMA kits on the same string, the older units tend to go offline. Enphase advises against using different inverter series on one branch. I'd suggest replacing the rest to prevent any further complications. By the way, how many D380s do you still have operational?

 

[gab00001]

Yeah, it's likely a compatibility issue, not just your setup. Some installers recommend replacing all D380s in a string to avoid communication issues like what @WattsUpDoc mentioned

 

[patsszs_]

I took over an older solar array at my brother's farm some time ago, which primarily uses D380 microinverters. I've been replacing the faulty units with Enphase IQ7RMA kits, but I've noticed that whenever I mix the two on the same string, the remaining D380s stop sending reports. Enphase has sent me full replacement kits whenever this happens, but it's become a bit of a recurring issue

Has anyone else experienced this problem when mixing the old D380s with the newer IQ7RMA kits? I'm curious if this is a known issue or if it's something specific to this particular setup

Good on Enphase for accommodating all those replacements but that also suggest incompatibility rather than just faulty units like the others pointed out.
Different Enphase generations often use distinct communication protocols..
The newer IQs might be interfering with or overriding the D380s' reporting on the same string.
If possible, consider putting the D380s and IQ7RMAs on separate strings to give each type their own clear communication path.
It's a pain, but could solve your recurring problem!

 

[Thongzai]

You're not the first person to have this issue and I remmeber a while back reading somwhere about a person reaching out to support and getting an advice that there's a problem with the wiring which is why he had issues. He did everything he could, and ended up replacing the D380 just to have the entire system working properly

 

[sol3rg1c]

I took over an older solar array at my brother's farm some time ago, which primarily uses D380 microinverters. I've been replacing the faulty units with Enphase IQ7RMA kits, but I've noticed that whenever I mix the two on the same string, the remaining D380s stop sending reports. Enphase has sent me full replacement kits whenever this happens, but it's become a bit of a recurring issue

Has anyone else experienced this problem when mixing the old D380s with the newer IQ7RMA kits? I'm curious if this is a known issue or if it's something specific to this particular setup

That's a common communication conflict when trying to mix different generations of microinverters on the same string.. the D380s use an older powerline communication protocol, and the IQ7RMA kits rely on a newer, more robust standard. When both are present, the newer IQ7s can sometimes effectively drown out the signals from the older D380s, causing them to stop reporting. Like what they said, it's usually recommended to keep different microinverter models on separate strings or even separate AC branches to avoid this kind of headache.