Recent content by DER Solar

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...