At the distributor counter, a wired LED flood light almost always looks cheaper than its solar equivalent. The fixture price is lower, the wattage is familiar, and the technology has twenty years of track record behind it. Then the electrician quotes the trenching, the cable run turns out to be 180 meters instead of 40, and the site sits three kilometers from the nearest stable grid connection. The purchase order that looked obvious on a price list becomes a very different decision on site.
This article gives wholesalers, distributors and project buyers a total cost of ownership (TCO) framework for comparing solar flood lights against wired LED flood lights. It deliberately avoids quoting specific prices – tariffs, labor rates and cable costs vary too much between markets to be meaningful in a general article. What it does give you is the full cost structure, the formulas, and a worksheet you can reuse on your next project.
What Total Cost of Ownership Actually Includes
A fixture price is one line item in a six-line budget. When a solar-versus-wired comparison only looks at the unit price, it silently ignores the categories where the two technologies differ the most.
- Equipment: flood light fixtures, poles or mounting brackets, and for wired systems, cable, conduits, distribution boards and protection devices.
- Installation labor: mounting and aiming the fixtures versus digging trenches, pulling cable and terminating at a board.
- Civil works: trenching, backfilling, reinstating driveways or landscaping – often the single largest hidden cost of a wired run.
- Energy: grid electricity consumed over the lifetime, versus zero consumption for a solar fixture with an adequately sized panel and battery.
- Maintenance and replacement: cleaning, driver or battery replacement, cable integrity checks, relamping.
- Downtime risk: the cost of a dark yard during a blackout, a tripped breaker, or a cable fault that takes days to locate.
Upfront Costs: Where the Money Actually Goes
The table below maps the two technologies line by line. Solar front-loads its costs into the fixture (panel, battery, charge controller, luminaire in one unit), while a wired system spreads them across the fixture, the cable run and the labor.
| Cost line | Solar flood light | Wired LED flood light |
|---|---|---|
| Fixture unit price | Higher – includes panel, battery, controller and luminaire | Lower – luminaire only |
| Cable and conduit | None between fixtures | Scales with distance; long runs need heavier cross-sections |
| Trenching and reinstatement | None | Required for buried runs; costly across concrete or asphalt |
| Distribution board and protection | Not required per fixture | Breakers, RCDs, sometimes a dedicated board |
| Installation labor | Mount and aim; typically one crew, no electrician certification for LV DC | Mount, wire, terminate and certify; electrical contractor required |
| Commissioning | Set the lighting mode; verify first-night charge | Test circuits, measure earth continuity, balance loads |
As a rule of thumb, the shorter the cable run and the closer the grid, the better wired looks. The longer the run – or the further the site sits from reliable power – the faster the solar option closes the upfront gap, because trenching and cable costs grow with distance while solar costs do not.
Energy Costs: A Formula, Not a Bill
For a wired flood light, annual energy cost is straightforward to estimate:
Annual energy (kWh) = fixture wattage x operating hours per day x 365 / 1000, then multiplied by your local tariff per kWh.
For example, a 150 W flood light running 10 hours per night consumes roughly 548 kWh per year. Multiply that by your delivered tariff – including any demand charges or tariff escalations you expect over the fixture’s life – and you have the energy line. Commercial tariffs in many markets have risen faster than general inflation in recent years, so it is worth projecting two or three scenarios rather than one.
For a solar flood light, the grid energy line is zero. The energy cost is instead embedded in the fixture: the panel, battery and controller that were priced into the unit. The correct comparison is therefore not solar versus wired energy cost – it is solar’s higher purchase price versus wired’s purchase price plus accumulated energy bills plus the cable and trenching spend.
Maintenance and Replacement Over the Years
Both technologies need maintenance, but on different components:
| Maintenance item | Solar flood light | Wired LED flood light |
|---|---|---|
| Panel cleaning | Periodic wipe-down in dusty sites; output drops if neglected | Not applicable |
| Battery replacement | The first component to age in any solar light; a LiFePO4 pack is typically specified for well over 2,000 cycles – confirm the per-component warranty terms | Not applicable |
| Driver / LED module replacement | Same as wired – quality drivers last many years | Occasional, driver-dependent |
| Cable integrity | Not applicable | Insulation checks, gland corrosion, rodent damage on long runs |
| Aiming and mounting | Check after storms or high wind | Same |
The battery is the honest weak point of solar economics and should be modeled openly: price the replacement pack plus labor into year five to eight of your TCO, and the comparison stays credible. Reputable suppliers state battery chemistry and cycle life on the datasheet – for a reference configuration, see the all-in-one solar street light A21 with its LiFePO4 battery options; if a quote does not, ask. Our own warranty terms break coverage down by component for exactly this reason.
Downtime Risk: The Cost Nobody Puts in the Spreadsheet
In markets with unstable grids – the brownout-prone areas of the Philippines, or sites in Nigeria running on generator-heavy supply – a wired flood light is only as reliable as the power behind it. During an outage, a wired flood light goes dark no matter how good the fixture is, and the business impact (an unlit yard, an unmonitored perimeter, a rescheduled shift) lands on the buyer.
A solar flood light is immune to grid events by construction. It can still fail – a battery that was undersized for the monsoon-season sun, a panel buried under dust – but its failure modes are per-fixture and independent, not grid-wide. For buyers in off-grid or weak-grid sites, this resilience is often the deciding factor that no unit-price comparison captures.
A Simple TCO Worksheet You Can Reuse
Run both options through the same six steps with your own numbers:
- Count the fixtures and measure (or estimate) the total cable run for the wired option.
- Get the upfront quote for each option: fixtures, cable, trenching, boards, labor.
- Calculate annual grid energy: wattage x hours x 365 / 1000 x local tariff.
- Estimate annual maintenance for each option, including periodic battery replacement for solar at the cycle life stated on the datasheet.
- Choose a horizon – five years is typical for a lighting project – and add lines 2, 3 and 4 across it.
- Add a downtime allowance only if your site has a real exposure: outages per month x hours per outage x cost of one dark night.
Two projects with identical fixture counts can land on opposite sides of this comparison, because cable distance, trench difficulty and grid reliability are site variables, not product variables.
When Solar Flood Lights Win
- Long cable runs: the further the power source, the more trenching and cable cost the wired option accumulates.
- No grid or unstable grid: solar removes the blackout variable entirely.
- Hard-to-trench surfaces: concrete aprons, landscaped grounds, or sites where excavation permits are slow.
- Temporary or expanding sites: relocate a solar fixture by unbilting it; relocating buried cable is a civil project.
When Wired Flood Lights Win
- Dense installations close to existing distribution: short runs keep both upfront cost and losses low.
- High-power, long-duration loads: where fixtures run all night at high wattage, panel and battery sizing for solar becomes expensive.
- Sites with cheap, reliable grid power and in-house electrical maintenance capability.
Questions to Ask Any Supplier Before You Compare Quotes
Whether you buy solar or wired, the datasheet decides the TCO. Before comparing quotes, confirm:
- For solar: battery chemistry and capacity (Wh), PV panel wattage, and the stated autonomy in nights, not just hours.
- For solar: the ingress protection rating of the battery and driver compartments, and per-component warranty terms.
- For wired: driver brand and surge protection rating, and the expected LED lumen maintenance at mid-life.
- For both: photometric files or a lighting layout so the wattage comparison is based on delivered lux, not nameplate watts.
Get a TCO Comparison for Your Own Project
If you are weighing solar against wired for a specific site, send us the layout, the operating hours and the local tariff, and we will run the comparison with you – including a per-fixture energy and maintenance projection. Typical production lead time is 15 days, with MOQ from 50 units for OEM orders. For help sizing the fixtures themselves first, see our flood light buying guide and the lux calculation walkthrough.
Visit our contact page to request a battery-inclusive quotation with datasheets, or browse the full product range.
