Enphase Enlighten Accuracy

[slopoke]

Does anyone know how accurate the readings from the Envoy unit are? I've been getting around 40-41 kW hours out of my 6.9kW system for the last few days and it looks more that I expected the system to produce. A link to the public page is below.

https://enlighten.enphaseenergy.com/pv/public_systems/5cSh318298

[silversaver]

I think the result is really good for your size of system. I'm only getting about 35kWh out of my 6.6kW facing SW245 deg with 23 deg pitch. My month-to-date is only 442kWh and your system is 466kwh MTD (It should be more difference since you had cloudy days to began with). I also look at your peak power is about 5.57kW and mine were peak at about 5.15kW. Looks like the Enphases and LGs are doing pretty good

[Ian S]

Does anyone know how accurate the readings from the Envoy unit are? I've been getting around 40-41 kW hours out of my 6.9kW system for the last few days and it looks more that I expected the system to produce. A link to the public page is below.


https://enlighten.enphaseenergy.com/...ems/5cSh318298

By strange coincidence, that's about what my 6.9 kW system has been producing the last few days. If you have had clear cool days and your system is unshaded with southern azimuth and with a typical tilt angle, your production is reasonable.

[slopoke]

By strange coincidence, that's about what my 6.9 kW system has been producing the last few days. If you have had clear cool days and your system is unshaded with southern azimuth and with a typical tilt angle, your production is reasonable.

Good to hear that my numbers are to be expected. Glad that my actual production far exceeds the projected production.

[Ian S]

Good to hear that my numbers are to be expected. Glad that my actual production far exceeds the projected production.

Keep in mind that projected production, especially if it's guaranteed, will be low-balled. Also, projected production numbers generally take into consideration "average" weather conditions for the location of the system - not every day is crystal clear and cool. My first year production exceeded my guaranteed number by about 5% IIRC. PV Watts doesn't do a bad job of prediction if you increase the derate factor from 0.77 to somewhere between 0.83 and 0.87.

[silversaver]

If your North CA solar system can produce as much as same size solar system in AZ, Enphase is as good as it advertise....... I'm jealous

[Ian S]

If your North CA solar system can produce as much as same size solar system in AZ, Enphase is as good as it advertise....... I'm jealous

I doubt the inverter has much to do with it. For a good comparison, you'd need to know azimuth and panel inclination. My system has a rather low angle of inclination (15 deg) which yields better production when I most need it i.e. late spring and summer but it's not so great in the winter months. Livermore also was about 5C cooler on average yesterday than Phoenix so that helps his production. Probably not as much of a brown cloud there either.

[silversaver]

I doubt the inverter has much to do with it. For a good comparison, you'd need to know azimuth and panel inclination. My system has a rather low angle of inclination (15 deg) which yields better production when I most need it i.e. late spring and summer but it's not so great in the winter months. Livermore also was about 5C cooler on average yesterday than Phoenix so that helps his production. Probably not as much of a brown cloud there either.

Agree. Just looking at his enphase monitoring, more than half of his system is facing almost East 111 deg... very nice