Monsoon, power and GST. The outdoor LED video wall reality check.

An outdoor LED video wall in Karnataka faces three tests the brochure skips. The south-west monsoon arrives in June and tries every seal. The wall runs ten or twelve hours a day and shows up on the electricity bill. And the invoice carries 18% GST, which is either a cost or a credit depending on how you buy. Plan for all three on day one, and the wall becomes pleasantly boring.

What does the monsoon actually do to an outdoor LED wall?

Rain on the face of a sealed module is not the problem. Water that finds a path is. Wind drives rain in sideways. A parapet splashes it upwards. A cable carries it downhill into a cabinet. A hot cabinet cools fast in a sudden shower and draws in damp air. Each of those is an installation question, not an LED question. A covered porch or an open corridor counts as outdoor for all of this; indoor vs outdoor LED wall draws the line.

IP65, and what the number promises

IP65 means dust-tight and protected against jets of water. PixelSpot's outdoor modules are sealed to IP65 at the face, the side the weather hits; the rear of the cabinet is IP54, protected against dust and splashing water. The rating describes a cabinet on a test bench, though. On your building it holds only if the seals, cable entries and drainage around it are done right.

Gaskets and cable entries

Cables should enter from below through proper glands, with a drip loop so water falls away before it reaches the entry. Never from the top, and never through a taped joint. Gaskets between cabinets and around service doors compress with age, so they need a look every year before June.

Drainage

Water that gets into a frame must be able to leave it. Drain holes stay open. Sealing them with silicone to keep water out only traps condensation inside. A drip edge or hood along the top keeps sheeting rain off the top row, and a powder-coated or galvanised frame stops rust streaks running down the screen by the second season.

Surge protection and earthing

Pre-monsoon thunderstorms are hard on electronics. A surge protection device on the incoming supply, an RCCB on the wall's circuit and a tested earth, never the neutral, cost little next to the receiving cards and power supplies they protect. Most of the receiving-card and power-supply failures we repair trace back to a floating earth or a voltage sag.

How much power does an outdoor LED wall use?

An outdoor wall is bright because it has to beat the sun, and brightness costs watts. The figures below are what we measure on our outdoor P3 to P6 walls, rated up to 4,500 nits. Peak is a full-white frame at full brightness. Normal video averages a quarter to a third of that.

Average at 300 W per m², the middle of the outdoor range. Peak at 700 to 900 W per m². Units for 10 hours a day, 30 days.

Now the bill. For the arithmetic, assume a commercial tariff of ₹8 a unit. That is an assumption, not a BESCOM quote: slabs, fixed charges and taxes differ by connection, so use the rate printed on your own bill. At ₹8 a unit, 1,670 units come to about ₹13,400 a month, and 500 units to about ₹4,000. If the wall sells advertising slots, that bill is the E in the slot price; running a wall as a DOOH asset shows the formula.

Size the supply for the peak

The average sets the bill. The peak sets the wiring. Outdoor walls above about 100 sq ft go on three-phase, with the cabinets spread across the phases. A 20 × 10 ft wall can peak above 13 kW, so check the sanctioned load on your BESCOM connection before fabrication starts. Every outdoor wall needs an earthed, IP65 distribution box within 3 m, and a stabiliser or online UPS where the voltage swings, which is common on shared transformers in older parts of the city.

Four ways to cut the bill

• Auto brightness. PxlOS dims the wall by ambient light, which alone saves 20 to 40% on an outdoor wall at night.
• Dark backgrounds. Bright text on black uses a fraction of the power of a white background, and reads better from the road.
• Schedules. Switch off, or drop to a low-power still, after closing time.
• Common-cathode panels. They use 20 to 30% less than common-anode panels at the same brightness. Ask for them on large walls.

The indoor and outdoor tables are on the power consumption page.

How does 18% GST work on an outdoor LED wall?

Every part of the purchase carries 18%. Only the code on each invoice line changes.

How PixelSpot invoices, as confirmed by our chartered accountant. Check your own filing with yours.

Take the outdoor P4 10 × 6 ft wall at ₹3,70,000 + GST, with the controller and installation included. Bought from a Karnataka supplier for a site in Karnataka, the invoice adds CGST at 9% and SGST at 9%, together ₹64,170, for a total of ₹4,20,670 including GST. From a supplier in another state, the same 18% is charged as IGST.

If your business is GST-registered and uses the wall for business, the full 18% is available as input tax credit, so your real cost is the pre-GST figure. That holds whether you capitalise the wall as plant and machinery or book it as an advertising expense; your CA will say which suits your books. For depreciation, LED walls are generally treated as plant and machinery at 15% on the written-down value, again a call for your CA.

What to check on the invoice

• An HSN or SAC code on every line, not one code for everything
• Both GSTINs, yours and the supplier's
• The place of supply, which decides CGST and SGST or IGST
• The e-way bill for the shipment
• The pre-GST price and the GST shown separately, never merged into a lump sum

The HSN code and GST guide has the full worked invoice. For a GST-inclusive figure for your own size, the configurator takes about a minute.

Where to go next

None of this is exotic. It is a gasket, a surge device, a dimming schedule and a clean invoice. Get them right on day one, and the only thing anyone notices about your wall is what is on it. If you are still choosing the spot, start with the outdoor site survey.