UDCPR: Solar Systems & Roof Requirements

• UDCPR mandates Solar Water Heating (SWH) or Rooftop Photovoltaic (RTPV) systems for buildings on plots larger than 4000 sq.m.

Roof Loading

• The minimum roof loading capacity considered for SWH/RTPV installation design is 50 kg/sq.m.
• Rooftop design must be suitable for a minimum load of 50 kg/sq.m to accommodate solar panels or SWH tanks.

Roof Area Usage

• A minimum of 25% of the roof area must be utilized for SWH or RTPV installation.

Installation Conditions

• An open, sunny roof area is necessary for installing SWH or RTPV systems.

Water Pipeline System

• Buildings with SWH systems must include an insulated hot water line from the rooftop.
• In new buildings, hot water pipelines must be insulated and distributed to required points.

Shading Prevention

• To prevent shading on the terrace, avoid any architectural elevation casting shadows.
• UDCPR mandates SWH/RTPV systems only when the roof has an open and sunny area.
• Architectural elements should not cast shadows on terrace solar zones, as shadows on solar installations reduce energy efficiency.

Exemptions

• Residential bungalows below 4000 sq.m. plot area are exempt from SWH/RTPV installation.

Environmental Purpose

• The key environmental purpose of SWH/RTPV systems is to promote renewable energy usage and sustainability.
• The primary benefit of mandatory SWH/RTPV systems in new buildings under UDCPR is renewable energy integration and sustainability.

RTPV Definition

• RTPV stands for Roof Top Photovoltaic.

Applications

• Solar-assisted hot water systems are typically used for bathing and domestic hot water supply.

Mandates

• Buildings constructed on a 5000 sq.m. plot must install SWH or RTPV systems mandatorily.

Insulated Pipelines

• Insulated pipelines are used in SWH systems to maintain heat and efficiently supply hot water.