Recent content by solar8484

It's one of the common problems reported in the Enphase forum.

That UPower is a rebranded PowerJack which is notorious for vastly overrated power capacity. The noisy waveform is due to poor filtering and regulation. Overloading is a likely cause of the humming and flat top waveform under load. PowerJack typically overrates power capacity by ~4x but...

It's best to connect Envoy in the same panel to avoid current and future potential Enphase comms issues and the expensive filter.

In general NEC does not officially specify specific UL standards in the codes. Instead the relevant standards are usually mentioned in the associated informational notes as guidance for the local AHJ's who ultimately decide what's acceptable. For example...

UL9540 is required. Make sure the battery sticker clearly show the specific UL compliance. There appear to be battery vendors that claim UL compliance but the actual battery systems don't actually have the necessary UL compliance markings to pass inspection.

Is this an off-grid system? If yes, you can probably pick an off-grid inverter and save money. If no (i.e. on-grid), it would be unlikely that you can legally use a DIY battery bank in an on-grid system due to UL compliance requirements.

😂😂😂

A small off-grid inverter/charger or a power station with internal relay and AC input on a timer should work. I have tested such setup with a small DIY system. There is no significant financial ROI from the load shifting but a longer backup time (more than long enough to setup and start a...

Can you also show the grid codes setting? The freq-watt (and volt-watt, etc.) curtail curve (including the frequency shift limits and resolution) is dependent on the grid code setting. It could help explain why the AC Coupling SOC limit didn't work as expected.

That seems odd. Perhaps there is another overall (i.e. not just for AC coupled charging) setting for max SOC charging limit? Slow ramp up is another enhancement (along with others like like freq-watt and voltage/frequency ride-through) in the default 2018 profile based on newer standards. I...

Doubtful unless you have actually tried it.

What does the inverter do when AC coupling on the load output?

Has anyone tried AC coupling on the EG4 18k load output?

None of the IEEE 1547 2015 profiles support freq-watt. Try the IEEE 1547 default 2018 or one of the CA Rule 21 grid profiles to enable freq-watt. Also, you should contact Enphase to make sure you have a recent firmware version (released within last 3 months) in the iQ8's that has reportedly...

CA Rule 21 profiles can also work but there are many different versions now, so it may take time to find the best for your system. The IEEE 1547 2018 default profile is newer superset. It would be best to get freq-watt working with SOC control for smoother operations. Frankly, with the...