Is $83,000 to install a 16.29kW solar system with battery storage a fair price?
Project Details
My electricity prices are very high, at 42.8 cents/kWh, and my average bill is $600-$800/month (about 2000 kWh/month averaged over the year). I'm considering overbuilding the system to account for degradation over time, even though I also received a quote for a 30-panel, 4-battery system with a net cost of $39k. I'm curious to see how these prices compare to other people on the mainland. The install is guaranteed by the end of the year, or my deposits are returned, but permitting can take many months in Hawaii. I understand that overbuilding for export value at the $0.14/kWh credit rate might not be worth it, and any unused energy that gets exported would just be a bonus. There are programs where the utility pays to take from my batteries for 2 hours during peak, but I'm unsure if that's worth it since I'd be locked in. I need to speak with the planner to see if we really need 4 batteries. Ideally, the batteries would last us from 5 PM to 9 AM, which is the peak rate period, and the panels would just need to have enough power to run the home and fully charge the batteries by that time every day, so we're hardly on the grid and avoiding the peak rate.
Quote Details
This quote is for a 16.29 kW solar system installation, designed to significantly reduce electricity bills. The system is estimated to bring the monthly bill down to the utility's bare minimum billable amount of $30, from an average of $600-$800/month (or $900/month based on the company's calculation). The worst-case scenario for payoff is estimated at 6 years, with substantial savings over the system's lifetime. The system components include: - System Size: 16.29 kW - Panels: 37 Hyundai 440W panels - Batteries: 4 Enphase 10C batteries - Inverters: Enphase microinverters - Warranty: 30-year warranty with Solar Insure
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More Details
Category
Solar
Price
$83,000
Quote Date
July 30, 2025
Location
Hawaii
Battery Storage?
No
# of Panels
37
System Size (kW)
16.29
Warranty (yrs)
30
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