Everything Maui homeowners need to know about going solar: electricity rates, export credits, solar production by region, available incentives, permitting, and how to choose the right contractor.
Maui County residents served by Maui Electric (now part of Hawaiian Electric) pay some of the highest electricity rates in the nation — averaging $0.46/kWh as of early 2026. That's more than 3× the U.S. mainland average. A properly sized solar system eliminates 85–95% of that bill, with most Maui homeowners seeing full payback in 5–7 years.
After the 2023 Lahaina wildfire, energy independence has taken on new urgency across Maui County. Battery storage with solar provides backup power during grid outages and reduces dependence on utility infrastructure — a priority for thousands of Maui families.
South Maui (Kihei, Wailea, Makena) receives 5.5+ peak sun hours daily with minimal cloud cover. Even Central Maui averages 5.0+ hours. Solar panels produce more energy per watt on Maui than nearly anywhere on the mainland.
Maui's grid serves a relatively small population spread across diverse terrain. Outages from storms, equipment failure, or high demand events are not uncommon. Solar + battery provides reliable backup regardless of grid status.
Maui Electric rates have consistently been among the highest of all Hawaiian Electric subsidiaries. Every kilowatt-hour your panels produce offsets electricity at $0.46+/kWh — making your return on investment substantial.
Maui homeowners qualify for the same state and federal incentives as Oahu: 35% Hawaii state tax credit (up to $5,000), federal battery credit, and BYOD+ grid-support payments.
Maui's diverse microclimates mean solar system design varies significantly by location. Here's what to expect in each region:
| Region | Peak Sun Hours | Climate Notes | Solar Rating |
|---|---|---|---|
| South Maui Kihei, Wailea, Makena |
5.5–6.0 hrs/day | Dry leeward coast, minimal cloud cover, hot | Excellent |
| Central Maui Kahului, Wailuku |
5.0–5.5 hrs/day | Warm, trade wind clouds in afternoon | Very Good |
| West Maui Lahaina, Ka'anapali, Napili |
5.3–5.8 hrs/day | Dry leeward, excellent production | Excellent |
| Upcountry Kula, Pukalani, Makawao |
4.5–5.2 hrs/day | Higher elevation = cooler temps = better panel efficiency. Morning clouds common. | Very Good |
| North Shore / East Haiku, Paia, Hana |
3.5–4.5 hrs/day | Windward, more rain and clouds. Still viable with proper sizing. | Good |
Key insight: Upcountry homes often outperform their predicted production estimates. The cooler ambient temperatures at elevation improve panel efficiency by 5–10%, partially compensating for fewer sun hours.
Maui Electric residential customers pay approximately $0.4636/kWh (2026 average). For a household using 600 kWh/month, that's roughly $278/month before solar.
New solar installations on Maui go on the SRE Export program. Your excess solar energy is credited at time-of-use rates:
| Period | Hours | Export Rate |
|---|---|---|
| Daytime | 9am – 5pm | $0.066/kWh |
| Peak Evening | 5pm – 9pm | $0.182/kWh |
| Overnight | 9pm – 9am | $0.131/kWh |
Why battery storage matters on Maui: The daytime export rate ($0.066) is very low compared to peak ($0.182). Without a battery, most of your excess solar earns the lowest rate. A battery stores daytime energy and exports during peak hours — nearly 3× the credit per kWh. Battery storage also provides critical backup power during outages.
Maui homeowners with battery storage can enroll in BYOD+ (Bring Your Own Device Plus). Hawaiian Electric pays you for allowing your battery to support the grid during peak demand:
| Incentive | Value | Applies To |
|---|---|---|
| Hawaii State Tax Credit | 35% of cost, up to $5,000 | Solar PV, Solar Hot Water |
| Federal Battery Credit | 30% of battery cost | Standalone battery storage |
| BYOD+ Upfront | $400/kW ($4,600 for Powerwall 3) | Battery systems enrolled in BYOD+ |
| Property Tax Exemption | Solar system value excluded from assessment | All solar PV systems |
| Hawai‘i Energy Rebate | $2,350–$2,500 (Oahu only) | Solar Hot Water — not available on Maui |
Note: The Hawai‘i Energy SWH rebate is currently available only for HECO (Oahu) ratepayers. Maui Electric customers should check hawaiienergy.com for current Maui-specific programs.
Solar installations on Maui require permits through the County of Maui Department of Public Works. Here's what to expect:
Building permit and electrical permit for most residential solar installations. Battery storage may require additional fire department review depending on location and system size.
Maui County permit processing typically takes 2–4 weeks for residential solar. After installation, a county inspection and Maui Electric interconnection approval are required before your system can operate.
After your system passes county inspection, your installer submits the interconnection application to Maui Electric. Approval and meter installation typically takes an additional 2–4 weeks.
A qualified Maui solar contractor handles all permit applications, county inspections, and utility interconnection paperwork. You should never have to visit a permit office or call the utility yourself.
Maui has a healthy market of qualified solar installers. Here's what to look for when choosing a contractor:
Verify your contractor holds a valid Hawaii C-13 (electrical) license and is authorized to install solar PV. Check the Hawaii DCCA contractor lookup before signing.
Contractors with a physical presence on Maui can respond faster for warranty issues, maintenance, and service calls. Ask where their warehouse and office are located.
Look for Tier 1 panels (REC, Panasonic, Q CELLS), reputable battery brands (Tesla, Enphase, SolarEdge), and inverters with proven Hawaii track records. Avoid off-brand equipment with limited warranty support.
Your contractor should provide a clear workmanship warranty (10+ years) separate from manufacturer equipment warranties. Get everything in writing before signing.
About Alternate Energy Hawaii: We are an Oahu-based contractor serving Oahu homeowners directly. While we don't install on Maui, we've built these resource guides from 33 years of Hawaii solar experience to help all Hawaii homeowners make informed decisions. Our solar calculator, HECO program navigator, and educational content are free tools for any Hawaii resident.
The 2023 Lahaina fire underscored the importance of energy resilience for Maui homeowners. Battery-backed solar systems can provide power during extended grid outages following natural disasters. If you're in a wildfire-prone area, discuss system placement and rapid shutdown features with your installer.
Homes within a mile of the coast (Kihei, Ka'anapali, Lahaina) should specify corrosion-resistant mounting hardware (stainless steel or anodized aluminum) and marine-rated electrical components. Ask your contractor about their coastal installation specifications.
Maui's trade winds help cool panels and improve efficiency, but also bring rain clouds to the windward (north/east) side of the island. South-facing roofs in leeward areas (South Maui, West Maui) see the best production. East-facing roofs in windward areas may need a slightly larger system to compensate.
Maui homes commonly feature composition shingle, standing seam metal, and tile roofs. All are compatible with solar, but tile roofs require specialized mounting and typically add $500–$1,500 to installation costs. If your roof is nearing end of life (15+ years for shingle), consider bundling a roof replacement with your solar installation.
Use our free calculators and guides to research your solar options — no contact information required.
Estimate system size, cost, and savings based on your electric bill. Works for any Hawaii island.
Find the right Hawaiian Electric program for your situation. SRE, BYOD+, NEM, and more.
Everything you need to know about solar in Hawaii, from system sizing to incentives.
Cash, loans, leases, and PPAs — compare the true cost of each option.
Tesla Powerwall, Enphase, backup sizing, and BYOD+ incentive details.
State tax credits, federal credits, BYOD+, and property tax exemptions.
Best solar conditions in the state — Big Island leeward guide
Windward Big Island — solar with rain considerations
Different utility (KIUC), different rules — complete guide
AEI's home island — direct installation services available