Velux VCS 4646 Solar Powered Flat Roof Skylight 1275x1275mm
The VELUX VCS 4646 is the largest solar powered flat roof skylight in the VCS range, sized 1275 by 1275mm. It is designed for grand entertaining spaces, luxury master suites and commercial applications, where a maximum opening of daylight on a flat roof is the aim. The sash is powered by an integrated photovoltaic panel with a rechargeable battery pack, so it opens, closes and vents by remote even on cloudy days. No electrician, no wiring and no ongoing energy costs.
Key Features
- Integrated solar panel powers all motorised functions with zero electricity cost
- Rechargeable battery pack keeps the skylight working on cloudy days
- Rain sensor closes the skylight automatically in wet weather
- Wall-mounted RF remote keypad with simple open, close and vent controls
- Large 1275 x 1275mm glazed area for maximum daylight
- High-performance double glazing with NEAT self-cleaning coating
- Approximately 75% heat block for year-round comfort
Specifications
- Model: VELUX VCS 4646
- Opening size: 1275 x 1275mm
- Type: solar powered opening roof window for flat roofs up to 15 degrees pitch
- Operation: wall-mounted RF remote keypad
- Power: integrated photovoltaic panel with rechargeable battery pack
- Glazing: high-performance double glazing with NEAT coating
- Rain sensor: automatic closure on detected precipitation
Applications
- Grand entertaining spaces and luxury master suites
- Commercial applications and retail spaces
- Rooms with flat or low pitch roofing
- Rooms where running wiring is not practical
What You Need To Complete Your Skylight Installation
To finish the job you need a flashing matched to your roof profile. Choose a custom skylight flashing for a weathertight seal, and compare the square VCS 3434 solar flat roof skylight if you need a slightly smaller opening. Browse the full solar flat roof skylight range in store.
Frequently Asked Questions
Does this solar skylight need wiring?
No. The VCS 4646 is powered entirely by its integrated solar panel, so there is no wiring and no electrician required for the opening mechanism. A rechargeable battery pack stores energy from the panel, which keeps the skylight operating even through overcast periods, and the wall-mounted remote runs without a mains connection.
What size is this skylight?
The VCS 4646 has an opening size of 1275 by 1275mm, the largest in the VCS range. It suits grand entertaining spaces, luxury master suites and commercial applications, where a maximum daylight opening on a flat roof is the goal.
What roof does it suit?
This skylight is designed for flat and low pitch roofs up to 15 degrees. A flashing matched to your roof profile and material is required and is sold separately. Choose the flashing option for your roof type and finish so the skylight drains water correctly and stays weathertight over time.
Can I order for delivery or pickup?
Yes. Order online for Australia-wide delivery or pickup from our Truganina trade counter in Melbourne’s west. We confirm your order once it is ready, and if you need help selecting the right skylight or flashing, call (03) 93941400 or email orders@singhroofingsupplies.com.au.

