Solar Plus, Inc.
Solar Plus, Inc. is a family-owned solar electrical contracting company, founded in 2002 and headquartered in Hanalei, Kauai, that designs, installs, and services residential and commercial solar PV, battery storage, and zero-export microgrid systems for customers across the Hawaiian Islands and California.
- Company typePrivate
- Founded2002
- HeadquartersHanalei, United States
- Headcount1–10
- GTM typeB2B and B2C
- OfferingServices
What Solar Plus, Inc. does
Solar Plus, Inc. is a family-owned solar electrical contracting company headquartered in Hanalei, Kauai, Hawaii, operating since 2002 across the Hawaiian Islands and California. The company designs and installs residential and commercial solar PV systems, battery storage, and electric vehicle charging infrastructure, with a specialization in zero-export / self-supply microgrid automation that combines PV, lithium iron phosphate (LFP) batteries, hybrid inverters, and optional propane backup generators to enable off-grid operation with the grid retained as a backup. The company is the first on Kauai to use this microgrid architecture with KIUC interconnection approval and serves as the authorized Sol-Ark inverter beta tester and repair service provider for the State of Hawaii, giving it early access to new inverter capabilities (12K, 15K, 30K, 60K product lines) and direct influence on product development for Kauai's grid environment.
The core product stack is built on Sol-Ark hybrid inverters, SimpliPHI, Pytes, and HomeGrid LFP batteries, and REC and Lumos solar panels, with the Sol-Ark Mega Ark 500kW+ containerized storage solution extending the company into larger commercial and community-scale work. Customer evidence includes nonprofit clients (Kauai Economic Opportunity, National Tropical Botanical Garden), government projects (Hale Opio solar carport for the State of Hawaii), and named residential installations (Kimolana Estate at 52.48 kWp PV / 190 kWh storage). Verified revenue mechanics include one-time project installation revenue, recurring O&M agreements with real-time monitoring, authorized Sol-Ark service revenue, and a financing referral partnership with American Savings Bank for Clean Energy Loans (5.069%+ APR, $1,500–$70,000). The company sells exclusively through direct, consultative field sales led by founder Doug Phillips, with no self-serve, marketplace, or reseller channels, and reaches customers through its website, Instagram, email capture, and word-of-mouth referrals.
Solar Plus, Inc. firmographics
Firmographics- Name
- Solar Plus, Inc.
- Legal name
- Solar Plus Inc.
- Website
- https://solarpluskauai.com
- Company type
- Private
- Founded year
- 2002
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Solar Plus, Inc. is a family-owned solar electrical contracting company, founded in 2002 and headquartered in Hanalei, Kauai, that designs, installs, and services residential and commercial solar PV, battery storage, and zero-export microgrid systems for customers across the Hawaiian Islands and California.
- Ownership category
- akta.pro rank
Solar Plus, Inc. industry classification
Industry- Product category
- Solar Energy Contracting and Microgrid Installation
- NAICS
- Solar Electric Power Generation (221114)
- akta.pro primary industry
- Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)
- akta.pro secondary industry
- Owner’s Engineering, Grid Interconnection & System Studies (PVsyst/Performance Modeling, Protection Studies) (EUACAGAG)
Keywords
Where Solar Plus, Inc. is headquartered
LocationHeadquarters
- HQ city
- Hanalei
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Solar Plus, Inc. business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales
Revenue model
- Solar PV System Design and Installation: One-time installation revenue from custom solar PV system design, equipment supply, and installation for residential and commercial customers. Revenue is earned upfront at project completion (custom project-based pricing).
- Microgrid and Battery Storage Systems: Sale and installation of battery energy storage systems (LFP batteries) and microgrid automation packages, sold as add-on to or independently from PV installations. Custom project pricing.
- Operation & Maintenance (O&M) Agreements: Recurring revenue from O&M contracts covering program maintenance, software updates, panel cleaning, warranty management, and performance monitoring. Includes real-time monitoring via Sol-Ark inverter app. Custom plans tailored per project.
- Solar Financing Referral (American Savings Bank): Referral partnership with American Savings Bank for 'Clean Energy Loans' to residential customers. While the loan is provided by ASB, Solar Plus drives the customer to financing, enabling higher transaction values and customer acquisition.
- Sol-Ark Service and Repair (Hawaii): Solar Plus is the authorized service provider for Sol-Ark inverters in Hawaii, conducting beta testing and repair. This generates service revenue and deepens the technology partnership.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Monthly | American Savings Bank 'Clean Energy Loan' — As low as 5.069% APR, loans from $1,500 to $70,000 |
| Other | Pay-as-you-go | Solar Installer / Racking Technician — $30.00+/hour DOE |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels5 records
Solar Plus, Inc. product offering
Product offeringCore offering
Solar Plus, Inc. designs, sells, and installs custom residential and commercial solar PV systems integrated with lithium iron phosphate battery storage and proprietary zero-export microgrid automation on Kauai, Hawaii and in California. The company delivers turnkey projects — site assessment, engineering, equipment supply, installation, commissioning, and ongoing Operation & Maintenance — that allow customers to operate off-grid while using the utility grid as backup, often eliminating reliance on net metering. Additional offerings include electric vehicle charger integration, hybrid heat pump water heaters, and authorized Sol-Ark inverter service and beta testing across the State of Hawaii.
Product overview
Solar Plus, Inc. offers a comprehensive portfolio of solar energy solutions centered around smart energy microgrids with automation. The core offering consists of residential and commercial solar PV systems, supplemented by specialized microgrid technology that combines PV, batteries, generators, and automation for off-grid capability with grid backup. Key product components include REC and Lumos solar panels, Sol-Ark inverters (15K residential and 60K-3P commercial), SimpliPHI and Pytes lithium iron phosphate batteries, and the Sol-Ark Mega Ark containerized storage solution. Additional offerings include electric vehicle integration, smart home automation, hybrid heat pump water heaters, and operation & maintenance services. The company positions itself as the first on Kauai to implement zero-export automation technology using cutting-edge lithium iron phosphate batteries.
Differentiator
Problem solved
Functional benefit
Products and services
- Commercial Solar PV Systems Custom commercial photovoltaic (PV) solutions designed to reduce operating costs and provide long-term energy control for businesses, including custom design, installation, and ongoing maintenance.
- Residential Solar PV Systems Complete home solar design and installation services covering all solar-related systems with a focus on efficiency, sustainability, and cost-effectiveness, including smart home integration.
- Smart Energy Microgrids Hybrid solar systems utilizing PV, batteries, generators, and automation to provide off-grid capability with grid backup. Features zero-export automation that allows customers to prioritize energy use and control how energy flows through the microgrid.
- Electric Vehicle Integration
Quantifiable outcome
- Electricity bills reduced by ~75% (from pre-solar to post-solar bills described as 'about one-quarter of what they were prior')
- +5 more outcomes
Companies that use Solar Plus, Inc.
Customer profileNamed customers8 records
Segments3 records
Ideal customer profiles2 records
Solar Plus, Inc. technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Solar Plus, Inc. partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered flagship / core, core and minor.
- Sol-Arkflagship / coreSol-Ark is Solar Plus's primary inverter technology partner. Solar Plus was an early adopter (found Sol-Ark at Solar Power International 6 years prior to the source date) and now serves as the authorized beta tester and repair service provider for Sol-Ark inverters in the State of Hawaii. Solar Plus provides direct product feedback that drives new features and functionality. Sol-Ark has developed commercial-scale inverters (15kW, 30kW, 60kW) that Solar Plus uses in commercial projects. Sol-Ark's hybrid inverters enable Solar Plus's zero-export self-supply microgrid model — a technology the company claims is unique on Kauai.
- SimpliPHIcoreSimpliPHI is a battery technology partner. Their SimpliPHI 6.6 Battery (LFP, 100Ah per unit, stackable) is featured in Solar Plus residential and commercial projects. SimpliPHI batteries are outdoor-rated, have rapid installation (RapidStak connector), and carry a 10-year warranty with >75% capacity guarantee. SimpliPHI appears in Solar Plus's 'Our Trusted Partners' logo section on the homepage.
- REC GroupcoreREC Group (Norwegian solar panel manufacturer founded 1996) is Solar Plus's primary solar panel partner. REC Alpha Pure R Series panels (430W, 60-cell) are used in projects, featuring 25-year performance warranty. REC is the only solar brand to have won three Intersolar Awards. REC panels are specified for their high efficiency and extended warranty, particularly in projects like the Kimolana Estate where space and corrosion resistance matter.
- Oahu Agriculture and Conservation AssociationminorReferenced in the context of USDA REAP grant assistance. Solar Plus recommends that commercial customers contact Oahu ACA for help writing REAP grant applications (which can cover up to 50% of project cost for agricultural producers and rural small businesses). This is an indirect partnership — Solar Plus directs customers to Oahu ACA for grant writing support.
Scale indicators6 records
Recent moves6 records
Expansion highlights6 records
Solar Plus, Inc. competitors and assessment
Company assessmentDirect peers
- RevoluSun: Hawaii-based solar PV installer with residential and commercial focus. Directly comparable as a regional competitor in the Hawaii solar market targeting similar high electricity rate customers with similar installation-based business models.
- Hawaii Energy Connection: Hawaii-based solar installer serving residential and commercial customers across the islands with PV and battery storage. Directly comparable as a regional Hawaii solar EPC competing for the same customers as Solar Plus with overlapping service offerings.
Broad incumbents
- Tesla Energy: National solar (Solar Roof, Solar Panels) and energy storage (Powerwall) provider with active Hawaii operations. Comparable as a broad incumbent offering integrated solar+storage solutions similar to Solar Plus's microgrid approach, though at vastly larger scale.
- Sunrun: Largest US residential solar installer with established Hawaii operations and Brightbox battery offering. Comparable as a national residential solar+battery provider with an overlapping customer base and similar integrated product offerings, though operating at much larger scale.
- Schneider Electric: Global energy management and automation company with microgrid solutions (EcoStruxure Microgrid). Comparable as a broader incumbent in the microgrid and distributed energy space that competes in adjacent commercial and utility segments.
Others
- Enphase Energy: Leading microinverter and home energy storage (IQ Battery) manufacturer. Comparable as an upstream technology vendor whose products (Enphase IQ8 + IQ Battery) compete with the Sol-Ark + SimpliPHI stack that Solar Plus integrates in residential installations.
- Sol-Ark: Texas-based hybrid inverter manufacturer whose products power Solar Plus's microgrid solutions. Comparable as the upstream technology partner whose products are increasingly sold direct via Sol-Ark Owner's Box, partially bypassing traditional installers like Solar Plus.
- Generac: Major US energy equipment manufacturer with PWRcell battery storage and home standby generators. Comparable as an ecosystem vendor whose battery products compete with the SimpliPHI and Pytes storage that Solar Plus integrates into its microgrid solutions.
- SolarEdge: Global solar inverter and energy storage manufacturer. Comparable as an upstream ecosystem vendor whose inverter + storage products (SolarEdge Energy Bank) compete with the Sol-Ark-based stack Solar Plus integrates in residential and commercial installations.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Solar Plus, Inc. social profiles
Digital presenceSolar Plus, Inc. financial estimates
Financial estimateRevenue estimate
Valuation estimate
Solar Plus, Inc. leadership team
Management profileNumber of profiles
Profiles1 record
Solar Plus, Inc. funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Solar Plus, Inc. M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Solar Plus, Inc.
What does Solar Plus, Inc. do?
Solar Plus, Inc. designs, sells, and installs custom residential and commercial solar PV systems integrated with lithium iron phosphate battery storage and proprietary zero-export microgrid automation on Kauai, Hawaii and in California. The company delivers turnkey projects — site assessment, engineering, equipment supply, installation, commissioning, and ongoing Operation & Maintenance — that allow customers to operate off-grid while using the utility grid as backup, often eliminating reliance on net metering. Additional offerings include electric vehicle charger integration, hybrid heat pump water heaters, and authorized Sol-Ark inverter service and beta testing across the State of Hawaii.
Is Solar Plus, Inc. a public or private company?
Solar Plus, Inc. is a private company. It is classified as family owned and is currently operating.
When was Solar Plus, Inc. founded?
Solar Plus, Inc. was founded in 2002. It employs 1 to 10 people.
Where is Solar Plus, Inc. based?
Solar Plus, Inc. is headquartered in Hanalei, United States, in the North America region.
How does Solar Plus, Inc. make money?
Five revenue lines are on record. Solar PV System Design and Installation is the primary driver. The others are microgrid and Battery Storage Systems, operation & Maintenance (O&M) Agreements, solar Financing Referral (American Savings Bank) and sol-Ark Service and Repair (Hawaii).
Who are Solar Plus, Inc.'s main competitors?
Direct peers on record are RevoluSun and Hawaii Energy Connection. Broad incumbents are Tesla Energy, Sunrun and Schneider Electric. Others are Enphase Energy, Sol-Ark, Generac and SolarEdge.
Does Solar Plus, Inc. have an API?
No public API is recorded for Solar Plus, Inc..
What industry is Solar Plus, Inc. in?
Solar Plus, Inc.'s product category is Solar Energy Contracting and Microgrid Installation. Its primary akta.pro industry code is EUAMABAB, Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System), with a secondary code of EUACAGAG, Owner’s Engineering, Grid Interconnection & System Studies (PVsyst/Performance Modeling, Protection Studies). Its NAICS code is 221114.