Private PPA: 24 Providers
Solar options for businesses, with practical points to compare before requesting a proposal.
ION Energy
ION Energy offers Private PPA assessment for businesses and factories, focusing on consumption patterns, installation space, site-use rights and project responsibilities before developing the commercial arrangement.
It may suit organisations starting with a feasibility assessment or comparing a PPA with purchasing their own system. Prepare electricity bills, operating schedules and site plans. Request clear metering, maintenance and expansion or relocation terms as part of the same proposal, rather than comparing headline electricity prices alone.
AESOVATION
AESOVATION offers Private PPA structuring for businesses seeking solar electricity through a provider-arranged system. Its service covers design, installation and care during the agreement, making electricity-use patterns, site readiness and contractual responsibilities central to the assessment.
Consider it when engineering and commercial arrangements need to be coordinated. Ask who invests, sells the electricity and maintains the system. Review the tariff formula, included works, maintenance access and end-of-term handover criteria in the project proposal.
B.Grimm Power
B.Grimm Power offers rooftop solar with provider investment, design, installation and connection under a long-term electricity purchase agreement. Published services include maintenance and performance monitoring through an application or website.
It may suit businesses seeking development and ongoing operation together. Review the connection design, settlement meter and installation plan for an occupied facility. Confirm monitoring rights and fault reporting, and distinguish the PPA offer from any outright-purchase option.
Banpu NEXT
Banpu NEXT presents a PPA solar package alongside an EPC purchase option. Its service information includes contract-period operation and maintenance, control-room monitoring and customer access through an application.
It may suit organisations assessing both funding and ongoing visibility of system performance. Confirm site eligibility, data access, warranties and transfer conditions. If batteries or other energy services are proposed, separate their costs and responsibilities from the solar electricity agreement.
BayWa r.e.
BayWa r.e. announced a partnership with SUSI Partners to develop PPA-based commercial and industrial rooftop projects in Southeast Asia, including Thailand. The published arrangement separates development, delivery and asset-management roles from investment ownership.
This is relevant when evaluating a developer-and-investor structure. Confirm the current Thai delivery team, contracting entity, system owner and service contact. A clear responsibility matrix is useful when several organisations participate in the same project.
BCPG
BCPG participates in rooftop solar Private PPA through an operating project portfolio. Its March 2026 announcement records the acquisition of Scan Advance Power, making current ownership a useful point to verify when comparing project references.
Businesses considering an energy investor can include BCPG in their initial enquiries. Confirm the contracting entity, whether new projects are being accepted, the required project scale and the operating team. An existing portfolio does not establish eligibility or commercial terms for a new site.
CapSolar
CapSolar offers both EPC and PPA routes for commercial solar. Its PPA service describes a provider-funded, owned and maintained rooftop system, with site assessment and electricity-use analysis informing the design.
This is a useful option for businesses comparing system ownership with contracted electricity. Request both proposals using the same load assumptions. Check metering, the treatment of lower-than-expected consumption and whether roof preparation or electrical upgrades are included in the quoted scope.
CHOW Energy
CHOW Energy describes factory Private PPA services in which the provider invests in solar and the customer purchases electricity under an agreement. Its wider business includes both EPC delivery and electricity-sale investments.
Consider it when comparing system procurement with long-term electricity purchasing. Request site and load criteria, the tariff schedule, roof-work exclusions and maintenance responsibilities. Review how production shutdowns or changes in site occupancy would affect the agreement.
Cleantech Solar
Cleantech Solar has documented Thai rooftop projects delivered under long-term PPAs, including facilities serving the electronics and automotive plastics industries. These examples establish experience with industrial premises of different types.
It is a relevant enquiry for organisations that need a developer to work within factory operating standards. Ask for comparable project references, installation plans that account for continuing production, and confirmation of the Thai service team and fault-response arrangements.
ClearSun
ClearSun presents a Private PPA service covering equipment investment, design, installation and maintenance for businesses and factories. Its service page also describes system transfer at the end of the agreed term.
It may suit buyers who want outsourced operation while considering future ownership. Put the required handover condition, remaining warranties, inverter replacement responsibility and post-transfer maintenance costs into the discussion. Receiving an asset does not make its future operation cost-free.
Constant Energy
Constant Energy has published corporate rooftop PPA projects in Thailand, including an agreement with Midea Refrigeration Equipment in Chonburi covering several buildings and a car park.
It may suit industrial organisations coordinating multiple installation areas and group-wide standards. Ask about phased delivery, area-level metering and safety responsibilities. Keep an on-site proposal distinct from any off-site procurement discussion, as the arrangements can involve different conditions.
Equator Solar Capital
Equator Solar Capital, or EQSC, describes a Private PPA offering developed alongside its solar project business. Its published approach includes investment in equipment, agreed maintenance and installation structures intended to support expansion or relocation.
Businesses evaluating available space and future expansion can use this as a starting point. Confirm whether the proposed structure fits the actual site, who supplies foundations and electrical works, and how later relocation or additional capacity would affect costs and contractual obligations.
GPSC
GPSC describes Private PPA solar generation and distribution in Thailand, with subsidiaries contracting with companies both within and outside PTT Group. Its stated investment scope includes rooftop and ground-mounted solar.
It is an option for organisations discussing energy investment with a power-generation group. Confirm which subsidiary handles new enquiries, accepted project types and sizes, development timescales and service scope. Portfolio information is context, not a site-specific commercial offer.
GreenYellow
GreenYellow provides Solar PPA with design, installation and ongoing operation. Its published solar solutions cover rooftops, ground-mounted systems, floating installations and carports, alongside separate energy-efficiency services.
It may suit businesses evaluating several installation areas or coordinating solar with an efficiency programme. Separate the scope and savings assumptions for each service to avoid double counting. Confirm operating responsibilities, monitoring access and the site-access requirements attached to the proposed project.
GUNKUL
GUNKUL offers Private PPA services covering assessment, design, installation, commissioning and ongoing support. Its official business page describes customers across factories, hospitals, hotels and commercial buildings.
It may suit organisations seeking experience across different building types. Request references with a comparable load profile, and review roof readiness, the pricing mechanism and treatment of lower-than-assumed generation. Confirm the local service arrangements for the proposed site.
Impact Solar
Impact Solar presents Private PPA services for commercial and industrial users, with operating examples and generation monitoring among its published materials. For a business with several buildings, individual load patterns matter more than a single combined electricity total.
Consider it when seeking a long-term developer and operator. Ask about reporting access, building-level metering and how temporary building closures are handled. If outright ownership is also under consideration, request a comparable system-purchase proposal using the same technical assumptions.
NextE
NextE presents Solar PPA through NextE Green Energy, covering investment, installation, electricity production and maintenance. Its published service explains that equipment choices, contract duration and consumption patterns affect the offer.
This is an option for businesses comparing equipment and term choices. Confirm the current minimum project criteria, discount formula, transfer provisions and replacement responsibilities. Published examples should be treated as discussion points, with the actual site proposal governing the agreed scope.
Prime Road Power
Prime Road Power lists Private PPA alongside power investment, EPC and energy-equipment trading among its businesses. Published company material describes Thai rooftop electricity-sale projects across several building types.
It can be considered when comparing investment and construction arrangements. Confirm the current project team, actual investor and counterparty, funding plan and continuity of maintenance. Review up-to-date company and project documentation before entering a long-term agreement.
Ratch Pathana Energy
Ratch Pathana Energy publishes a rooftop Private PPA business with examples spanning factories, hospitals and hotels, alongside its wider industrial-park energy activities.
It may suit organisations coordinating solar with industrial-site or building-specific requirements. Confirm service availability beyond existing project locations, the connection point, equipment responsibilities and site-use terms. Keep the rooftop offer distinct from the group’s other generation projects.
SinoPower
SinoPower provides Private PPA from survey and design through construction and maintenance. Its published project types include rooftop, floating and ground-mounted solar, with monitoring and servicing described as part of the offering.
It can be considered where a business wants to evaluate more than roof space alone. Request a project-specific maintenance schedule, fault-response commitments and responsibility for the installation area. Confirm that the advertised service elements are included in the actual commercial proposal.
SOL Energy by EMSS
SOL Energy by EMSS advertises Private PPA for factories and businesses, describing provider investment and customer payment for electricity used from the system. Distinguish that offer from the company’s system-purchase packages when requesting quotations.
It may be relevant for buyers seeking provider-funded solar. Confirm eligibility, the contracting entity, the tariff and the settlement meter. Ask how shutdowns or reduced consumption would be treated; a short service description cannot establish every condition of the eventual agreement.
TID Power
TID Power offers business solar through both EPC and Private PPA, with installation examples covering factories and commercial premises. Requesting the same technical design under each investment route can make the comparison more useful.
It may suit organisations discussing engineering and funding options together. Confirm who would own the system and sell electricity under the PPA, the maintenance scope and installation impacts on production. Distinguish EPC delivery references from experience as the long-term electricity counterparty.
TotalEnergies ENEOS
TotalEnergies ENEOS has announced rooftop PPAs with Thai manufacturers. Its Jintana Intertrade project in Nakhon Ratchasima specifies provider financing, design, installation, operation and maintenance while the customer buys the generated electricity.
It may suit factories seeking a developer and operator for the project term. Request production reporting, Thai service responsibilities and site-use requirements. Clarify data rights and environmental-attribute ownership before using project results in corporate reporting.
WHA Solar
WHA Solar, under WHA Utilities and Power, offers Thai customers a Private PPA package covering site inspection, design, permitting, installation and long-term operation. The service describes WHA Solar as the system owner and operator under the agreement.
It may suit factories and commercial buildings coordinating installation with permits. Review site-use rights, paperwork responsibilities, connection and insurance requirements. Identify customer-supplied works and the process for any future change in building use.
