How do you connect a solar flood light safely? Start with the exact LED floodlight, PV module, battery pack and controller supplied for the project. Integrated and split-component products can have different wiring, voltage limits and connection sequences. The approved model-specific wiring diagram and installation SOP must govern the work; this EPC guide helps buyers and installers check the required interfaces, not bypass them.
1. Identify the Floodlight, Battery and Controller Configuration
Check the delivered bill of materials (BOM) against the approved quotation and model drawings. Nominal LED wattage alone is not enough to select connectors, fuses or a battery. Request the following information before any electrical installation:
| Component | Confirm before work | Matching record |
|---|---|---|
| LED floodlight | Measured input power, driver voltage/current, optical distribution, aiming and IP/IK scope | Exact-model datasheet and IES/LDT |
| PV module | Rated power, open-circuit/operating voltage, current and connector type at site temperatures | PV datasheet and connection drawing |
| Battery | Chemistry, usable Wh, BMS limits, protection, enclosure and maintenance access | Battery/BMS datasheet and pack diagram |
| Controller | Exact model and firmware, PV input, battery voltage, LED-load limits and control functions | Manufacturer-approved wiring and settings SOP |
| Mounting and cable | Bracket and pole loads, cable size, isolation, waterproof glands and strain relief | Project structural and electrical drawings |
Sunlurio has technically reviewed installation documents for its main lighting models. For a particular solar floodlight, request the document version matching the supplied controller and battery before energising the system.
2. Confirm Solar Exposure and the Lighting Layout
Record the installation country, worst-month solar resource, shading, site access, target area, mounting height and intended operating hours. Lighting for a parking area, construction yard, compound or remote facility may call for a different beam angle, glare limit and mounting structure.
- Photometric design: Select an actual IES/LDT file and verify target maintained illuminance, uniformity and glare with a DIALux or other approved layout calculation.
- Solar charging: Check seasonal irradiation, array azimuth, panel tilt, shading and maintenance access; do not use one universal tilt angle.
- Structural loads: Include PV-panel sail area, luminaire weight, arm outreach and site wind conditions in the bracket, pole and foundation design.
Where required, request model-matched photometric files before confirming equipment quantities and spacing.
3. Install the Mounting Structure and Enclosures Safely
Use appropriately qualified installation crews. Review permits, underground utilities, lifting arrangements, structural capacity, safe access and weather before starting work. The approved civil drawings—not a generic pole-height chart—must define foundation or embedment depth, reinforcement, anchor bolts and release-to-load requirements.
- Verify the correct bracket, fastener grade, tightening torque, corrosion protection and mechanical clearances.
- Install the battery and controller where the approved equipment drawings permit. Check airflow, enclosure heat, moisture protection, tamper resistance and replacement access together.
- Protect DC cables from abrasion, water ingress and mechanical strain. Use rated glands and compatible waterproof connectors without blocking intentional drainage or vents.
4. Use the Controller-Specific Connection and Isolation Sequence
There is no universal “battery first” or “solar panel first” sequence for every solar floodlight. Work only from the confirmed wiring diagram and safe isolation procedure for the supplied controller version. Qualified installers must identify and verify every connection and protective device.
- Before wiring: Establish isolation, identify terminals and cable functions, and check polarity, fuse/isolator ratings and overcurrent protection. Wire colour alone is not reliable identification.
- PV input: Ensure PV voltage and current remain within the controller limits, including cold-weather open-circuit voltage. Do not disconnect live PV connectors under load unless specifically rated and authorised for this.
- Battery circuit: Verify battery chemistry, nominal voltage, BMS permissions, polarity, short-circuit protection and isolation arrangements.
- LED output: Check the driver input range, load limits and compatibility with the controller’s output and dimming functions.
- Protection: Apply the project-approved grounding/bonding and surge strategy. Check cable entry, gland sealing and the mechanical support of all connections.
If the controller label, terminal arrangement or connector differs from the approved schematic, stop and request an updated drawing. Never improvise an electrical sequence to make mismatched equipment operate.
5. Set the Nightly Dimming Profile and Battery Autonomy
Calculate expected nightly energy use from the actual LED input power and the hours operated at each dimming level, adding controller and conversion losses. Compare that total with usable battery energy after temperature, depth-of-discharge and BMS limits. Size PV recharge against the worst solar month, not the advertised panel wattage alone.
Calculation illustration only: A 100 W floodlight at full power for 10 hours uses 1,000 Wh before system losses. Actual consumption can change with a timed dimming profile or motion detection. This does not establish a model’s certified runtime or several-night autonomy.
Program dusk/dawn sensing, timed operation, motion levels and fault modes according to the approved controller SOP. Keep the settings sheet in the EPC commissioning records; do not copy another project’s defaults.
6. Commission the Floodlight and Record the Tests
Use the model-specific commissioning or night-simulation mode to check startup, charging, dimming and fault indications. Do not pull live PV or battery connectors simply to simulate darkness. Test values and response delays depend on the controller and environmental conditions.
- Inspect polarity, terminal tightness, overcurrent protection, cable management and enclosure closure.
- Record required PV/battery electrical readings with the specified test procedure and compare them with the equipment datasheets.
- Verify luminaire alignment, fasteners, IP-rated seals and the operating/dimming schedule.
- Log controller firmware/settings, battery pack or batch details, defects and corrective actions for project handover.
Supplier technical support and commissioning checks are not the same as final site acceptance by the responsible EPC or project authority.
7. Typical Solar Floodlight Problems and Engineering Checks
| Symptom | Checks before replacing parts |
|---|---|
| No lighting after dusk | Review the programmed profile, controller status, battery/BMS protection and load output using the approved test mode |
| Unexpectedly low charging | Check PV exposure, allowable input range, controller settings, BMS state and connectors |
| Short runtime on cloudy days | Compare usable battery Wh and actual dimming hours with the site’s worst-month PV recharge calculation |
| Intermittent or wet-weather faults | Inspect cable glands, connectors, gasket sealing, corrosion, drainage and strain relief |
Do not bypass protection devices or repeatedly connect and disconnect energised cables while troubleshooting. Only substitute parts approved for the delivered model.
8. EPC Documentation, FAQ and Next Steps
For a reliable quotation or installation review, provide the project country, installation site, area to illuminate, mounting height, quantity, lighting schedule, autonomy requirement, wind/soil conditions and any available BOQ. Confirm these deliverables before release for installation:
- Matched floodlight, PV, battery/BMS and controller datasheets
- Controller-specific connection schematic, approved SOP, cable schedule and settings record
- IES/LDT file and lighting-layout calculation; bracket/pole/foundation drawings as applicable
- Configuration-matched electrical, ingress and structural evidence when required by the tender
- Component-level warranty terms, installation/commissioning checklist and spare-parts support
Do all solar floodlights use the same wiring order? No. The approved controller and battery architecture determine connection and disconnection procedures.
Does an IP66 rating guarantee coastal suitability? No. IP ratings address defined ingress tests; materials, fasteners, connectors and coatings require separate corrosion review.
Can battery capacity be chosen from the LED wattage? No. Use the actual load/dimming schedule, usable battery energy, losses, local solar resource and required nights of autonomy.
Need a project-specific review? Submit the project BOQ for preliminary engineering review or contact Sunlurio’s project team for model-matched datasheets, IES files and wiring documentation.
