18 Watt | 24 Hours | Long Backup | IP65 Rating | Day & Night Sensor | Motion Sensor – Solar Street Light

Overview

The 18W Solar Street Light (Double Body Model 1121, 6 Window) is the highest-wattage and most capable variant in the Double Body series, designed for wide colony main roads, housing society primary entrance roads, large parking lots, rural district highways, industrial estate perimeter roads, and farmhouse estate main access routes across India. With 480 LED 5730 EPISTAR chips producing a combined 180W output in cool white and a 3.2V 25Ah LiFePO4 battery rated for an exceptional 24 Hours of Long Backup at installation heights of 4–6 metres, the 18W Double Body 1121 delivers the highest LED count, the widest 6 Window beam distribution, and the largest battery capacity in the Double Body series. Fully automatic operation is handled by an integrated Day & Night Sensor and Motion Sensor, with IP65 weatherproofing ensuring year-round reliability — making the 1121 one of only two Double Body variants to provide multi-night backup and the definitive specification for high-priority outdoor road lighting across housing society and rural district contexts in India.

LED Performance & Light Output

The Double Body 1121 integrates 480 LED 5730 EPISTAR chips across a 6 Window array — the most extensive optical configuration in the Double Body series — at a combined 180W output in cool white. The 6 Window array provides the broadest beam spread in the series, directing light across wide road cross-sections of 5–8 metres at the 4–6 metre installation height, making the 18W model appropriate for housing society main roads, wide colony streets, large parking areas, and rural district lane junctions where lower-wattage models would be insufficient at the required pole height. EPISTAR 5730 chips at 480 count produce high lumen density with good thermal distribution across the 6 Window housing, ensuring consistent cool white output across India’s outdoor temperature range without localised overheating at the LED board level.

Battery – LiFePO4 25Ah Capacity & 24-Hour Long Backup

The 3.2V 25Ah LiFePO4 battery in the Double Body 1121 is 25% larger than the 12W model’s 20Ah unit, proportionally matching the higher 180W LED draw to deliver 24 hours of Long Backup — the highest backup rating in the entire Double Body series. This substantial energy reserve sustains multi-night operation through Motion Sensor-managed dimming across low-to-medium traffic environments, and maintains backup performance through consecutive monsoon overcast days in coastal and north-eastern Indian states where multiple-day cloud cover can prevent full daily charging. Compared to competing 18W solar street lights at similar price points using lead-acid or standard Li-ion batteries, the Double Body 1121’s LiFePO4 specification provides five or more years of daily operation without capacity degradation, sulphation risk, or the safety concerns inherent in those alternative chemistries — making it the correct long-term infrastructure specification for high-priority colony main road and housing society primary access road lighting.

Body Build & Weatherproofing

The Double Body 1121 carries an IP65 weatherproofing rating, certifying complete dust ingress protection and directional water jet resistance across India’s full range of outdoor climate conditions. At 82 × 24.5 × 10 cm, the 18W Double Body is the longest unit in the series, accommodating the 480-chip 6 Window LED array within a slim 10 cm depth profile that minimises wind load at the 4–6 metre installation height. The 50mm pole specification is consistent with the 6W, 9W, and 12W Double Body models, enabling a single pole standard for all wattages in mixed-zone colony and society projects. At 4–6 metres, the IP65 sealed housing must withstand the increased wind and weather exposure inherent at greater mounting heights — particularly in coastal and high-altitude locations across India. The sealed construction protects the 480-chip LED array and 25Ah LiFePO4 battery from moisture, dust, and thermal cycling that represent the primary failure modes for unattended outdoor solar street lights.

Smart Controls – Day & Night Sensor | Motion Sensor

The Double Body 1121 operates fully automatically through two integrated sensing systems — a Day & Night Sensor and a Motion Sensor — ensuring hands-free dusk-to-dawn performance without any manual switching. The Day & Night Sensor activates the unit automatically at dusk and switches it off at dawn across all seasons, providing consistent year-round coverage on housing society main roads and wide colony streets where manual daily switching is not operationally feasible. The Motion Sensor manages a three-state brightness sequence: 10% standby brightness during inactive periods, 100% full brightness on motion detection, and 15% brightness for 30 seconds post-motion before returning to standby. At 180W LED output, this sensor-managed dimming is the critical enabler of the 24-hour Long Backup — without dimming, constant 180W draw would exhaust the 25Ah LiFePO4 battery in approximately 9 hours, well short of even a single full dusk-to-dawn winter cycle. Motion Sensor dimming reduces average consumption to approximately 60–70W on medium-traffic housing society roads, enabling the 25Ah battery to sustain its full 24-hour long backup rating. The included remote control provides additional flexibility with OFF, ALWAYS, INDUCTION, and 2H, 4H, 6H timed induction modes — the 6H timed induction combined with INDUCTION radar being the recommended configuration for wide housing society main roads and large parking areas.

Solar Panel & Charging Efficiency

The 5V 23W monocrystalline solar panel in the Double Body 1121 is the highest-rated panel in the Double Body series, providing the daily energy harvest needed to replenish the 25Ah LiFePO4 battery within 6–8 hours of direct sunlight. At 23W panel output, the harvest-to-storage ratio of the 18W model is well-calibrated for the 24-hour Long Backup specification. Monocrystalline efficiency of 19–22% maintains reliable charging under India’s most challenging irradiance conditions — including the 90+ day monsoon season in the Western Ghats and north-east, and the low-sun-angle winter days of Delhi, Haryana, and Punjab — outperforming polycrystalline alternatives in both full-sun and diffused light conditions. The factory-integrated panel angle ensures consistent orientation without on-site adjustment across bulk installations by contractors and developers.

Installation & Mounting

The Double Body 1121 installs without external wiring or grid connection. The fully pre-assembled unit — with Day & Night Sensor and Motion Sensor factory-integrated — mounts on a 50mm pole at 4–6 metres height, the highest installation range in the Double Body series, enabling coverage of wide colony main roads and large open parking areas at appropriate luminance levels. The 4–6 metre range bridges the boundary between residential and entry-level commercial outdoor lighting, making the 18W Double Body the appropriate specification for housing society primary access roads, large farmhouse estate main drives, rural district road lighting, and industrial estate perimeter roads. The shared 50mm pole specification with the 6W, 9W, and 12W Double Body models simplifies supply chain management for projects deploying multiple wattages across different zones of the same colony or society. Supplied at 3 units per carton, reflecting the larger unit size.

Technical Specifications

Ideal Applications

• Housing colony narrow footpaths and internal pedestrian lanes
• Residential society compound perimeter and garden lighting
• Rural gram panchayat village lane and alley lighting
• Farmhouse boundary perimeter and garden access track lighting
• Gated community security and entry gate lighting
• Small parking lot perimeter and two-wheeler zone lighting
• School campus internal pathways and boundary wall lighting