Get your personalized system size, savings estimate, and HECO program analysis in under 60 seconds
Your Home & Electric Bill
%
30–50%: Covers daytime use. Best economics per panel.55–75%: More panels, but excess exports earn only ~$0.14/kWh vs. $0.41 retail.80–100%: Maximum panels. Consider adding a battery for better value at this level.
sq ft
$/month
Find this on your Hawaiian Electric bill. An estimate works too.
$/kWh
HECO Oahu avg.
Pre-filled with the current residential rate for your island.
Hawaii zip code. Uses GIS solar radiation data for your area instead of the island average.
What Equipment Does Your Home Have?
Select everything that applies — this helps us size your battery backup accurately.
Calculating your optimal system...
Your Custom Solar System
Here's What We Recommend
Solar Panel System
--
Solar Panels
-- kW System
REC 460W HJT Panels
Battery Storage
--
Powerwall 3
-- kWh Total Storage
-- hours backup
Monthly Savings
--
Estimated Savings Per Month*
Estimated new bill: --/mo (currently $--/mo)
Payback Period
--
Years to Pay Off*
After incentives applied
Where your savings come from
Without a battery, solar panels only offset electricity you use while the sun is shining. For most homes, about 60% of usage happens in the evening and at night — those hours still come from the grid.
Daytime use offset by solar--/mo
Excess solar exported to HECO (SRE credit)--/mo
Evening & night usage (still from grid)--/mo
Per-panel economics
-- panels covering daytime use
Each panel saves --/yr at retail rates
-- additional panels exporting to grid
Each panel earns only --/yr via SRE — --× less per panel
Customize Your System
All AEH installs are whole-home backup — this just controls how much extra battery we add for grid-down protection beyond the normal evening/overnight cycle.
Uncheck to size for the case where EV charging defers during outages. EV is still on the backed-up panel either way.
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Financial Summary
System Cost--
Tax Credits & Incentives--
Net Cost After Incentives--
Annual Savings (Year 1)*--
25-Year Net Savings*--
Monthly Payment Options
See what your system costs under different financing paths:
* Lease estimate is illustrative only and not based on a specific lender quote. Actual terms vary by installer and credit profile.
25-Year Cost Comparison
Without Solar--
With Solar--
Utility costs assume 3% annual rate increase at --/kWh.**
Hawaiian Electric Program Savings
Your solar + battery system qualifies for these HECO programs:
SRE
Smart Renewable Energy
Export excess solar at time-of-use rates, locked for 7 years.
Daytime9am-5pm$0.135/kWh
Peak5pm-9pm$0.329/kWh
Overnight9pm-9am$0.189/kWh
Monthly SRE Credit--
BYOD+
Bring Your Own Device Plus
Earn incentives for battery dispatch during peak demand.
Upfront Incentive--
Dispatch Window6pm-8pm daily
Program Term5 years
Monthly Value--
Combined Value Over 5 Years
--SRE Credits
+
--BYOD+ Value
=
--Total Savings
* All savings, payback, and return figures assume a cash purchase with no financing costs. If you finance with a loan, interest payments will reduce your net savings and extend payback. With a lease, the leasing company claims the tax credits, so your out-of-pocket incentives differ. See Financing Options for a side-by-side comparison.
** Projections are based on current HECO utility rates for your island, estimated system production using Hawaii solar radiation data, and applicable federal (30%) and state (35%) tax credits. Actual results vary with weather, shading, electricity usage patterns, rate changes, and equipment performance. This is an estimate — your free proposal will include site-specific pricing.
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