Ground frame for 40 REC Alpha Pure-RX REC470AA Pure-RX (HJT) panels (2×20)

Three snow and wind zones

The same table designed for three regional centres: with the lowest, the median and the highest combined snow and wind load under DBN V.1.2-2:2006. For another site, open the frame in the builder.

Checks and cautions

Member utilisation as the engine computes it. Cautions are checks that pass, but with a small margin.

• Embedment, mmThe footing resists wind uplift at above 80 % utilisation, or it is shallower than the frost depth. The soil resistance in the calculation is an estimate — check the soil on site.Kherson: Foundation Ø400 × 900: 0.113 m³ of concrete per post. Wind uplift on the front post ≈ 10.6 kN (with γ=1.5) vs ≈ 10.9 kN (concrete weight + soil friction, estimate) → 97%.Cherkasy: Foundation Ø300 × 1 100: 0.078 m³ of concrete per post. Wind uplift on the front post ≈ 9.2 kN (with γ=1.5) vs ≈ 9.5 kN (concrete weight + soil friction, estimate) → 98%.Chernihiv: Foundation Ø300 × 1 300: 0.092 m³ of concrete per post. Wind uplift on the front post ≈ 9.0 kN (with γ=1.5) vs ≈ 11.2 kN (concrete weight + soil friction, estimate) → 81%.
• Max. frame pitch, mmThe purlins between the frames are used above 80 % (strength or deflection): the structure passes, but the margin is small. A shorter frame pitch or a deeper purlin gives more margin.Cherkasy: Frame spacing 2 390 mm, 11 frames. Purlin C-channel 60×40×2: strength 91%, deflection 85% of L/200 (snow on panel 977 Pa).Chernihiv: Frame spacing 2 390 mm, 11 frames. Purlin C-channel 60×40×2: strength 98%, deflection 92% of L/200 (snow on panel 1 106 Pa).
• Rafter profileThe rafter is used above 80 %, or the frame's posts stand far apart: the structure passes, but the margin is small.Cherkasy: Rafter C-channel 60×40×2: span between posts 1 691, cantilever 612 mm → strength 82%.Chernihiv: Rafter C-channel 60×40×2: span between posts 1 691, cantilever 612 mm → strength 89%.

Bill of materials

The parts of one table for the median zone (Cherkasy): mark, name, profile, cut length, quantity.

Profile cutting

38 bars of 6,000 mm, 212.1 m of profile in total.

• Tube 60×60×211 bars
• C-channel 60×40×227 bars

Estimated cost

The engine's materials estimate for the median zone (Cherkasy).

Materials

79,668₴

With installation and delivery

127,578₴

Per 1 kW

6,786UAH/kW

The engine's estimate has 23 lines; the full list is in the builder. Prices are the typical market prices built into the Solispec engine, as of 06.10.2026; no margin, no VAT.

Yield

Yield: 1,139 kWh per 1 kW a year, ≈ 21,409 kWh a year in total (median zone, Cherkasy; tilt 30°, the optimum for the latitude is 35.3°).

A preliminary calculation; a design needs an engineer's check. Snow and wind per DBN V.1.2-2:2006 for the regional centre; profiles, footings and estimate by the Solispec engine 0.12.0.

Other layouts of this panel

• 1×5 · 5 pcs
• 1×10 · 10 pcs
• 2×5 · 10 pcs
• 2×6 · 12 pcs
• 2×8 · 16 pcs
• 2×10 · 20 pcs
• 2×12 · 24 pcs
• 2×15 · 30 pcs
• 3×10 · 30 pcs
• 3×20 · 60 pcs

The 2×20 layout with other panels

• Jinko Tiger Neo JKM620N-66HL4M-V620 W
• Jinko Tiger Neo JKM440N-54HL4R-V440 W
• Astronergy ASTRO N7s CHSM48RN(DG)/F-BH-460460 W
• Jinko Tiger Neo JKM590N-72HL4-V590 W
• Astronergy ASTRO N7s CHSM54RN(DG)/F-BH-520520 W
• Jinko Tiger Neo 3.0 JKM720N-66HL5-BDV720 W

Next

• REC Alpha Pure-RX REC470AA Pure-RX (HJT) in the catalogueSolar panels
• A 20 kW ground plant in KhersonGround frames
• A 20 kW ground plant in CherkasyGround frames
• A 20 kW ground plant in ChernihivGround frames
• All ground framesGround frames