Put your roof to work. Rooftop solar, industrial solar and battery-storage planning for the homes, businesses and factories powering Bangladesh.
01 / OUR SOLUTIONS
From a family home to a factory floor, plan rooftop solar and optional battery storage around your site and the way you use energy.
FOR HOMES & BUILDINGSMake room for cleaner energy, without using more land. A considered approach for houses, apartments and commercial rooftops.
FOR FACTORIES & ENTERPRISESTurn an underused roof into a productive energy asset. Solar project cooperation for factories, garment facilities and warehouses.
SOLAR + STORAGE / ONE CONNECTED SYSTEM
A better energy plan starts with how your site works. Explore solar and battery storage for factories, homes and selected backup loads.
01 / COMMERCIAL & INDUSTRIAL
Match rooftop generation to production hours. Evaluate battery storage for surplus solar, peak-demand management and selected backup loads.
02 / RESIDENTIAL SOLAR + STORAGE
Plan a rooftop system around your household’s daily use. Where suitable, store surplus generation for later and define which circuits need backup.
03 / BACKUP & RETROFIT PLANNING
Identify essential equipment, starting currents and required runtime. Review the existing PV system, transfer arrangement and any generator interface before selecting storage.
Illustrative configuration. Not a product model or an electrical construction drawing.
Equipment compatibility, battery siting, ventilation, fire protection and local approvals are reviewed for each project. Backup capability and savings depend on the final design and operating conditions.
SYSTEM EQUIPMENT / SELECTED TO WORK TOGETHER
Understand the equipment in your proposal. Brands, ratings, warranty terms and service responsibilities are confirmed in the project quotation.
Roof layout, module selection, wind loading and waterproof mounting details.
Match voltage, phase, PV inputs, battery interfaces and protection requirements.
Select usable energy, charge/discharge power, thermal management and suitable siting.
Specify metering, generation visibility, battery status, alarms and access responsibilities.
Equipment categories for project planning—not a claim of authorization by any manufacturer. Final availability and specifications are subject to written confirmation.
Request a configuration discussionSOLAR PROJECT GUIDES / BANGLADESH
Explore the right questions, equipment choices and delivery scope before you invest in rooftop solar or battery storage.
A roof can do more than provide shelter. Plan a solar PV system around the roof you have, the electricity you use and the people who will maintain it.
Explore guide02 / SOLARMake your factory roof part of your energy plan. Commercial and industrial solar starts with production schedules, electrical demand and a buildable roof—not a standard equipment package.
Explore guide03 / SOLARSolar generation and battery storage do different jobs. A useful hybrid solar or BESS proposal explains what will run, when it will run and how the system will respond to an outage.
Explore guide04 / SOLARA good installation begins before equipment arrives. Agree on the design, roof responsibilities, safety arrangements and handover documents before the project moves to site.
Explore guide05 / SOLARA panel price is not the price of a working solar installation. Compare the complete scope, not just a per-watt headline, before choosing a system for your home or factory.
Explore guide06 / SOLARTreat the electricity connection as part of the solar project—not an afterthought. Begin with the official guidance and confirm the requirements for your own consumer connection.
Explore guide07 / SOLARThe project continues after installation. A clear operations and maintenance plan helps owners know what to monitor, when to request an inspection and who is responsible for a fault.
Explore guideOur Bangladesh cooperation point is in Uttara, Dhaka. We welcome project enquiries from Dhaka, Gazipur, Narayanganj, Savar, Chattogram and elsewhere in Bangladesh. Site visits, installation coverage and service arrangements are confirmed for each project; these locations are not separate branch offices.
PROJECT REFERENCE LIBRARY
Explore published rooftop solar projects in Bangladesh and beyond, from garment factories to commercial buildings.
Independent industry references, not Haozailai projects or customers. Capacities are reported by the linked publishers; card photos illustrate the application, not the named project.
Illustrative photoGazipur · Bangladesh
SOLshare describes a rooftop installation at IRIS Garments, showing a garment-factory application.
Source: SOLshare
Read original caseIllustrative photoNarayanganj · Bangladesh
A garment-factory rooftop project commissioned by SOLshare with Knit Concern Group.
Source: SOLshare
Read original case
Illustrative photoBangladesh
SOLshare reports a solar installation at a distribution depot, illustrating a logistics rooftop application.
Source: SOLshare
Read original caseIllustrative photoDhaka · Bangladesh
An office rooftop installation described in SOLshare’s 2022 report, connected to the grid.
Source: SOLshare · 2022
Read original caseIllustrative photoChengdu · China
Trinasolar’s published factory case features a rooftop array using anti-dust modules.
Source: Trinasolar
Read original caseIllustrative photoSouth Africa
A large shopping-centre rooftop project listed in Sungrow’s commercial and industrial reference collection.
Source: Sungrow
Read original caseFACTORY & INSTALLATION FILMS
Go inside a module factory, explore roof-mounting components and watch a flat-roof installation overview.
Third-party videos in their original language. Publishers retain ownership; inclusion does not imply a partnership. Installation footage is an overview, not a site-specific construction plan.
FACTORY TOUR
A tour of the Hi-MO 9 production environment and LONGi’s Lighthouse Factory.
Published by: LONGi Solar
Watch on YouTubeMOUNTING SYSTEM
AC Solar Warehouse introduces Schletter rails, clamps, feet and cable management.
Published by: AC Solar Warehouse
Watch on YouTubeROOFTOP INSTALLATION
Schletter Group demonstrates its flat-roof mounting system and assembly concept.
Published by: Schletter Group
Watch on YouTubeSelecting play loads the external YouTube player. Videos may be unavailable on some networks; the original source link is always available.
THINK LOCAL. BUILD WITH CARE.
Good solar projects begin with the right questions. In Bangladesh, every site deserves its own technical assessment.
Review electricity bills and daytime demand before deciding on system capacity.
Check structural capacity, drainage, waterproofing and safe maintenance access.
Consider monsoon conditions, wind exposure and the environment around your site.
Confirm equipment, responsibilities, approvals and aftercare in your project proposal.
FROM DESIGN TO HANDOVER
A China–Bangladesh project starts with a shared plan: site assessment, equipment documentation, installation coordination and agreed aftercare.
Share your location, roof type and recent electricity use. We start with your goals.
Review site suitability and develop a proposed layout, equipment scope and estimate.
Confirm the contract, approvals and delivery plan before installation and testing.
Agree commissioning records, system guidance and the ongoing maintenance arrangement.
03 / CHINA ↔ BANGLADESH
Haozailai’s Bangladesh cooperation point brings a China–Bangladesh perspective to rooftop and industrial solar project discussions, connecting project needs with supply and delivery planning.
Let’s build the right planHaozailai Advertising & Decoration Co., Ltd.
Bangladesh cooperation point
中国江西上饶好在来广告装饰有限公司
GOOD QUESTIONS. CLEAR ANSWERS.
A few things to know before your first project conversation.
Suitability depends on roof structure, available area, shading, orientation and electrical infrastructure. A site survey and structural review are needed before a system can be confirmed.
These are a core focus of our project cooperation. Share the site location, available roof area and electricity bills so the project scope and delivery responsibilities can be discussed.
There is no one-size-fits-all figure. Capacity, equipment, roof work, consumption patterns and connection requirements all affect cost and savings. A site-specific proposal should state its assumptions; this website does not promise a fixed return.
A standard grid-tied solar system usually shuts down when the grid fails. Backup power requires a suitable hybrid or storage design and additional equipment. Discuss backup needs at the assessment stage.
It may be possible, but existing inverter compatibility, electrical layout, load profile and local requirements must be checked. Backup also requires suitable transfer, isolation and protection arrangements; adding a battery alone does not guarantee power during an outage.
Connection and any net-metering arrangement depend on the applicable rules and the relevant electricity utility’s approval. Eligibility and the current requirements need to be verified for your site before contracting.
LET’S TALK ABOUT YOUR ROOF
Planning rooftop solar, a factory project or solar + battery storage in Bangladesh? Prepare these details for a useful first conversation.
WhatsApp uses our China number (+86). Bengali, English and Chinese enquiries are welcome.
Have these details ready for your assessment.
District, area and building use
Approximate area, roof type and photos
Recent bills, operating hours, critical loads and backup time