Editorial owner: MCL Solar Knowledge Center. Technical scope: Final sizing must be verified against the selected model, site coordinates, climate data, and contract documents. Last updated: July 16, 2026.
Key takeaways:
- Choose the architecture from site constraints, not from a universal ranking.
- All-in-one systems simplify installation; split systems provide more freedom for panel, battery, and luminaire sizing.
- Compare daily load, worst-month solar resource, thermal conditions, maintenance access, wind loading, and verified test reports.
- The correct choice is project-specific and must be confirmed in the PI or sales contract.
All-in-one and split systems defined
An all-in-one solar street light integrates the luminaire, controller, battery, and usually the solar panel into a compact assembly. A split system places major components separately so their size, orientation, and service access can be optimized independently.
Project selection matrix
| Decision factor | All-in-one | Split system |
|---|---|---|
| Installation | Fewer field connections and faster assembly | More wiring and installation control |
| Energy sizing | Limited by the integrated housing and panel format | Greater freedom for panel and battery capacity |
| Panel orientation | Usually linked to the luminaire or bracket geometry | Can be optimized separately for the site |
| Thermal management | Compact packaging requires careful heat evaluation | Battery and electronics can be located separately |
| Maintenance | Module replacement can be quick when parts are accessible | Individual components are easier to isolate and replace |
| Typical use | Paths, local roads, parking areas, and standardized programs | High-load, long-autonomy, or highly customized road projects |
Energy and climate checks
Calculate the daily load from each dimming period and any continuous camera or communications load. Size the battery from required autonomy, usable depth of discharge, discharge-path efficiency, and temperature derating. Size the photovoltaic array from worst-month peak sun hours and explicit system losses. Autonomy and post-rain recovery charging must be checked separately.
Optical and structural checks
Do not select a system from watts or a beam-angle label alone. Use the model-specific IES or LDT file and a DIALux calculation that states road width, pole height, spacing, overhang, tilt, maintenance factor, average illuminance, uniformity, and glare or TI where applicable. Structural review must use the design wind speed, projected areas, pole geometry, and foundation conditions.
Procurement checklist
- Model number and rated LED input power
- Model-specific LM-79 or equivalent photometric report
- Battery chemistry, rated Wh, test method, and traceability
- Controller charging profile, protections, and conversion efficiency
- Ingress-protection reports for each relevant enclosure
- Installation drawing, service method, and spare-parts plan
- Standard system warranty of 5 years; any extension stated in the PI or sales contract
Limitations
No architecture is best for every climate or road. A final recommendation requires site coordinates, operating profile, target lighting class, installation geometry, wind data, and the exact proposed model.
Add serviceability and change control to the comparison
Installation time is only one part of the all-in-one versus split decision. The procurement review should also compare battery access, controller replacement, optical options, panel orientation, heat exposure, theft risk, spare-parts strategy and the effect of a component change on the approved configuration.
For lifecycle comparison, state which parts can be replaced in the field, which tools are required, whether sealed modules must be returned, and how long compatible spares will remain available. These questions often matter more than a small difference in initial installation labor.
All-in-one vs split solar street lights for road projects
All-in-one solar street lights integrate the light, solar module, battery and controller in one housing, while split systems place the solar module and lighting system in separate positions. For a road project, the choice should follow the available solar exposure, required lighting layout, mounting geometry, climate, maintenance access and project documentation鈥攏ot the product label alone.
| Decision factor | All-in-one system | Split system |
|---|---|---|
| Physical layout | Integrated housing on the luminaire | Solar module can be positioned separately from the luminaire |
| Solar exposure | Evaluate whether the luminaire position provides suitable solar access | Useful when the best solar-module position differs from the light position |
| Road geometry | Evaluate pole height, arm projection, road width and optical distribution | Evaluate the same lighting geometry plus module mounting and cable routing |
| Maintenance | Inspect the integrated housing and its service access | Define inspection access for the separate module, cable, controller and battery locations |
| Tender documentation | Specify complete system inputs and acceptance checks | Specify module position, cable routing, protection and component-level acceptance checks |
Solar street light procurement checklist
Before requesting a quotation, prepare the road width, pole height and spacing, mounting-arm geometry, required operating schedule, project location, rainy-season or autonomy assumptions, target lighting class or photometric requirement, quantity, wind and corrosion exposure, and required drawings, photometric files, datasheets and test documents. Ask each supplier to state which inputs were used and which values still require confirmation.
Send MCL Solar the road layout, pole spacing, operating schedule, project location and quantity for an initial product and design discussion. Final selection remains subject to the project requirements and verified technical documents.
Engineering & Manufacturing Verification at MCL Solar
All commercial solar street lighting luminaires, intelligent MPPT controllers, and Q235 hot-dip galvanized steel poles are manufactured in-house by Zhongshan Chengyu New Energy Technology Co., Ltd. at our 35,000 m² production facility in Guzhen Town, Zhongshan, Guangdong, China.
Explore our verified municipal track record: Saudi Arabia 253 Sets 55°C Desert Highway Project, Philippines Coastal Highway Typhoon-Resistant Installation, or inspect third-party IEC/CE/ISO test reports at our Compliance Verification Center.
Need Engineering Sizing or EPC Tender Support?
Contact MCL Solar’s engineering division for complimentary DIALux road lighting simulations, solar autonomy calculations, and direct factory pricing for municipal and commercial infrastructure projects.