Edit your system
Your system is making about a third less than it should
Likely fault91-1020 Pueo Loop, Ewa Beach. 6.2 kW, installed 2016.
Should make8,700 kWhA year, for your roof and age
Made last 12 months5,900 kWhFrom your monitoring app
Gap2,800 kWh32% less, about $1,176 a year
Expected against actualkWh a year
Expected8,700
Actual5,900
Under 10% gap: healthy10 to 20%: worth a checkOver 20%: likely fault
How we worked this out
Expected = 6.2 kW x 1,480 kWh per kW x (1 - 0.005 x 10 years)
= 6.2 x 1,480 x 0.95 = 8,717, rounded to 8,700 kWh
Gap = (8,700 - 5,900) / 8,700 = 2,800 kWh = 32%
Value = 2,800 kWh x $0.42 = $1,176 a year
- 1,480 kWh per kW
- What a kW of panels makes on your roof in a year, from Google's Solar API and imagery of your roof
- 0.5% a year
- Normal wear on panels. At 10 years, expect 95% of new.
- $0.42 per kWh
- Example Oahu residential rate. Your HECO rate may differ.
An estimate, not a diagnosis. Common causes of a gap this size: a failed inverter or optimiser, a string that has stopped, loose wiring, or new shade from trees.
Book a diagnostic visit
A technician tests the inverter, each string and the wiring, then tells you what is wrong and what it costs to fix before any work starts. We repair systems from any installer.
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NameRobert Fujimoto
Phone(808) 555-0148
EmailOptional
Request Thu 10 Dec, 13:00
We call to confirm the time. Your numbers go to our repair team, so you do not have to explain twice.
See what a healthy result looks like