Solar Lighting for Tennis Courts
-- A Specifier's Guide
Solar Lighting for Tennis Courts: A Specifier's Guide
A tennis court is one of the easier loads to take off-grid: the demand is known, the site is open, and the lights run at night when nobody is watching the meter. The engineering is not exotic. It is matching a fixed nightly lighting load against an array, a battery, and a control strategy, then proving the lighting meets the standard your players expect. This page is the manufacturer's version of that brief: what we specify, what we refuse to guess, and the numbers that decide the design.
What the lighting system has to deliver
Tennis is a ball-tracking sport, so the lighting specification is about more than average brightness:
- Illuminance and uniformity. The court needs a defined horizontal lux level with even coverage. A bright center with dark ends is worse for play than a lower, uniform level. Sports lighting standards such as EN 12193 define classes by illuminance and uniformity; your designer selects the class for the level of play, from recreational training to televised competition. Typical design targets run from a few hundred lux for training upward of 700 lux for high-level competition — confirm the class in your spec, because we build to the class you name, not to "bright."
- Glare control. Players look up to track the ball. Fixtures need beam control that keeps light on the court and out of players' eyes, which is an optical design problem, not a wattage problem.
- Color rendering. CRI (Color Rendering Index) matters for ball visibility and broadcast work. Modern high-efficacy LEDs deliver both rendering and efficiency, so there is no longer a trade to make.
The equipment, in engineering terms
| Component | What we specify | Why |
|---|---|---|
| Fixtures | Professional LED floodlights, high luminous efficacy | System size is driven by fixture watts; efficacy is the cheapest way to cut array and battery cost |
| Battery | LiFePO4 (lithium iron phosphate) | Cycle life and thermal safety at court-scale capacity; we do not spec lead-acid for new court systems |
| Panels | Monocrystalline silicon | Highest conversion efficiency per m², and courts rarely have spare area |
| Control | MPPT (Maximum Power Point Tracking) charge control with dimming schedules | Extracts the most from the array and lets lights step down after prime hours |
The sizing arithmetic that decides the project
The design is a load calculation, and it is not complicated. Here is the worked shape of it with round numbers so you can follow the logic:
- Nightly lighting load. A court lit to a training-level class typically runs on the order of 2–4 kW of fixtures for 4–5 hours, which is roughly 10–15 kWh per night. Your fixture count and hours come from the lighting design — run the layout in our lighting design tool before sizing hardware.
- Array. Divide the nightly load by usable peak sun hours. At 4–5 peak sun hours, that load implies roughly 3–5 kWp of panels before losses, then add margin for cloudy-week autonomy and winter sun angles.
- Battery. Autonomy is the design choice. We quote three days of storage as the default for courts, because a rained-out week followed by a scheduled match is a real scenario, not a hypothetical. Size the bank for the full nightly load multiplied by autonomy days at a safe depth of discharge.
These are ranges with stated assumptions, not a quotation. The output of the real calculation — fixture layout, lux class, sun hours at your latitude — moves the numbers, sometimes by a lot.
Mounting and maintenance, the unglamorous parts
Court floodlights ride on poles at the court sides, typically 8–12 m high for tennis so the beam clears baseline sightlines; the array and battery cabinet want their own pad away from play, fenced, with wash access and shade for the electronics. Maintenance is panel cleaning and an annual torque check on brackets and pole bolts — small work, but budget it, because a court lighting system that cannot be serviced is a court that goes dark.
Where solar court lighting earns its keep, and where it doesn't
The strongest case is a court without cheap grid power nearby. When the alternative is trenching a feeder across a park, or running a diesel generator through the evening, the solar system usually wins on capital cost before fuel is even counted. Grid-tied courts on low tariffs are a weaker case: the payback there is measured against retail electricity, and any "few years" claim is only true if the system displaces enough of it. Ask for the electricity price, utilization hours, and incentive assumptions behind any payback figure you are given. Ours are stated or not quoted.
Solar court lighting is a poor fit where the court sits in permanent shadow from buildings or mature trees, or where the owner needs competition-grade illumination: higher lux classes demand proportionally larger arrays and batteries, and at some point the clubhouse roof becomes the better host for the array while the battery sits indoors.
What we deliver, and what this page does not cover
We supply the fixtures, array, LiFePO4 battery, MPPT controller, and the poles or brackets your structure requires, plus the lighting calculation and the load schedule. Start with the class and hours in the lighting design tool; the DC side of our court systems uses the same charge-control and battery platform as our all-in-one solar street lights.
Scope: this page covers off-grid and hybrid solar lighting for outdoor tennis courts. It does not cover indoor courts, arena-scale sports lighting, or grid-tied rooftop PV. Those are different engineering with different pages.