Solar vs LED Street Light: Which to Choose
· NEON team
Compare solar and mains-powered LED street lights on installation cost, running cost, battery life, grid independence and suitable site types.
The decision is rarely about energy cost. In most projects we quote, the electricity bill over the life of a street light is small compared to the cost of getting a cable to it. Solar wins where the cable is expensive; mains wins where it is not.
The cost structure of each option
Mains-powered LED street light
- Lower unit cost for the same output
- Higher installation cost: trenching, conduit, cable, distribution board, meter, possibly a transformer
- Unlimited runtime at full output, independent of weather and season
- Predictable performance over a 10-year+ horizon with driver replacement
- Bounded by grid availability and supply stability
Solar (all-in-one) street light
- Higher unit cost for the same nominal output — you are buying panel, battery and controller alongside the light
- Near-zero installation cost beyond the pole
- Output shaped by panel size, battery capacity, latitude and season
- Battery becomes a service item, typically at year 4–7 depending on chemistry and climate
- Fully independent of the grid
The break-even point is a trenching question
The way to decide is to price the cable route, not the fittings. Ask:
- How far is the nearest supply point? A 30 m run on soft ground is a different proposition from a 300 m crossing under a paved road.
- Is there a surface that cannot be disturbed? Heritage paving, mature tree roots, a carriageway that cannot be closed. Each of these turns installation cost into a project risk.
- Will the connection need a transformer or supply upgrade? This often adds more than the lighting itself.
- Is supply reliable? On a weak or intermittent grid, a mains installation delivers poor lighting and premature driver failure.
If any of the first three answers is “yes, and it is expensive”, solar almost always wins on total cost of ownership despite the higher unit price.
Sizing a solar light correctly
This is where most solar projects go wrong, and it is worth being direct about why: a nominal wattage figure tells you almost nothing about performance in month three of a cloudy season. Four numbers determine the outcome:
- Latitude or nearest city — sets the worst-case daily solar yield
- Required hours of light per night, and whether full output is needed all night
- Panel mounting constraints — tilt, orientation and shading, especially tree cover
- Required autonomy — how many consecutive cloudy days the system must ride through
A 3000W fitting with an undersized panel and battery will disappoint. A 1000W fitting correctly sized to the site will not. If you are specifying by wattage alone, you are specifying the number that matters least.
Suitable site types
Solar fits well:
- Rural roads and access tracks with no nearby supply
- Parking lots, compounds and site perimeter lighting
- Parks, walkways, gardens and squares
- Locations where trenching would damage a surface
- Temporary or relocatable installations
Mains fits better:
- Urban streets where supply already exists along the route
- Tunnels, underpasses and any location with significant shade
- High-traffic roads needing guaranteed full output every night
- Sites with high ambient light where photometric control is critical
Hybrid is sometimes the answer. Mixing mains and solar along one scheme is legitimate where part of the route has supply and part does not — the fittings do not need to match.
What to send in an inquiry
For solar: nearest city, hours of light required per night, number of cloudy days to ride through, canopy or road width, and mounting height. For mains: road class, pole height, spacing and target lux.
With those, a supplier can size the system rather than quote a wattage — and if the requirement is not achievable at the price point you have in mind, you would rather know before the order than after installation.
Products referenced in this guide
All-in-One Solar Street Light, 100W–3000W, IP65
All-in-one solar street light, 100W–3000W, DC 6V, IP65, 37,500–62,500 lm at 125 lm/W with remote control and dusk-to-dawn operation.
- MOQ 2 pcs
Moon Style LED Street Light, IP67, 60W–400W
IP67 street light with a 60W–400W module range, customised to your pole design for roads, highways, sidewalks and squares.
- MOQ 2 pcs
Solar LED Flood Light, 150W–3000W, IP67
IP67 solar flood light, DC 6V, 10,000–11,000 lm at 100 lm/W with remote control, dimming and a 3-year warranty.
- MOQ 2 pcs