Integrated
Solar Roofs
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Architects and specifiers

What to draw, and what to specify

Two systems, each with its own minimum pitch, module sizes and details. Here is the data by system, the assembly they share, and the manufacturers' datasheets.

Full side-by-side table Datasheets
Specifier summary

The lines you'll draw from

Each value is named to its system. The full table, with warranties and certifications, is on the compare page.

ItemRoofit Velario®Roofit Solar Energy OÜSolRoof FIT VOLTBP2 Sp. z o.o.
Minimum roof pitch10° (about 2.1:12)More than 9° (about 1.9:12)
SeamDouble-lock standing seamSnap-on standing seam, 0.87 in (22 mm) high
Active module coverage and power54.2 × 21.6 in, 115 W · 66.8 × 21.6 in, 145 W20.7 × 79.1 in effective, 165 W
Plain panelsMatching plain standing-seam steelPlain FIT panels, 1020 mm and 2040 mm (40.2 in and 80.3 in) lengths
Ventilation and base, as documentedAt least 1.96 in (50 mm) of ventilation below the modulesOpen boarding at 13.1 in (333 mm) centers over 1.6 in (40 mm) counter-battens
Weight, as stated3.28 lb/sq ft (115) · 3.17 lb/sq ft (145), installed33 lb (15 kg) per panel
Module electronicsSpecified by Solar Seam for each projectSolarEdge optimizer for each pair of panels; SolarEdge inverter
Fire classification (EU)BROOF (t1), BROOF (t2)BROOF (t1), BROOF (t4)
UL 61730 listing (US)Not claimed; being verifiedNot claimed; being verified
  • Values as published by each manufacturer (datasheet, factsheet or installation manual), converted to US units.
  • Below a system's minimum pitch, the roof continues in standing-seam metal rated for that slope, detailed to match.
The shared assembly

What to draw

  1. Structural deck sized by the engineer for the roof's design snow and wind loads.
  2. Underlayment to the manufacturer's instructions and local code, with ice-dam protection at eaves and valleys where code calls for it.
  3. Battens and air gap to the manufacturer's layout, open at the eave and venting at the ridge.
  4. Active and plain panels joined at standing seams; active panels in clean fields, penetrations in plain areas.
  5. Matching metal trim at eaves, rakes, hips, valleys and ridge, with a vented ridge cap.
  6. A conduit path from the roof exit to the inverter location, and space for the inverter, disconnects and any battery.
Schematic section through an integrated solar roof, from the roof deck up: deck, underlayment, battens with a ventilation gap, then active and plain panels joined at a standing seam. Not to scale. Active panel cells under tempered glass, on steel Standing seam Plain panel same profile, no cells Ventilation gap over battens; the manufacturer sets the layout Underlayment on the deck, per the manufacturer Schematic, not to scale
Schematic only. Each manufacturer's instructions set seam type, batten layout and the air gap.
Downloads

Datasheets

The manufacturers' documents, as published. They list certifications as each manufacturer states them; we don't claim a UL listing for either system until we've verified it.

Roofit Velario®

SolRoof FIT VOLT

Send us the drawings

Send elevations and a roof plan. We'll mark up where each system can go active, the plain-metal areas, the trim, and the conduit path.

Ask a spec question Printable comparison

Attribution. Roofit and Velario® are products of Roofit Solar Energy OÜ (Estonia). SolRoof and FIT VOLT are products of BP2 Sp. z o.o. (EU). Solar Seam is an independent installer of both.