REC
Ground frame for 30 REC Alpha Pure 2 REC420AA Pure 2 (HJT) panels (3×10)
3 rows of 10 panels, 12.60 kW. The Solispec engine chose the profiles, the frame pitch and the footings for three snow and wind zones: Kherson has the lowest load of the regional centres, Cherkasy the median, Chernihiv the highest.
- Power
- 12.60kW
- Steel
- 531.5kg
- Posts
- 12
- Bolts
- 184
- Materials
- 75,229₴
- Yield
- 14,349kWh/year
Figures for the median zone (Cherkasy); all three zones are in the table below.
Ground frame designer
Open this frame in the builder
The builder opens with the REC Alpha Pure 2 REC420AA Pure 2 (HJT) panel and the 3 × 10 layout; site — Cherkasy. Change the site, the tilt or the profiles and the checks and estimate are recalculated.
- No sign-up
- Snow and wind check
- Drawings and estimate
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.
| Parameter | Low loadKherson · S₀ 760 · W₀ 480 | Median loadCherkasy · S₀ 1,520 · W₀ 420 | High loadChernihiv · S₀ 1,720 · W₀ 410 |
|---|---|---|---|
| Posts | Tube 60×60×2 | Tube 60×60×2 | Tube 60×60×2 |
| Rafters | C-channel 80×40×2 | C-channel 100×50×2.5 | C-channel 100×50×2.5 |
| Purlins and braces | C-channel 41×41×2.5 | C-channel 60×40×2 | C-channel 60×40×2 |
| Frames | 8 frames, pitch up to 1,470 mm | 6 frames, pitch up to 2,020 mm | 6 frames, pitch up to 2,020 mm |
| Posts | 16 | 12 | 12 |
| Footings (bored concrete) | 16 pcs, Ø400 mm, depth 1,100 mm | 12 pcs, Ø400 mm, depth 1,300 mm | 12 pcs, Ø350 mm, depth 1,500 mm |
| Concrete | 2.43 m³ | 2.16 m³ | 1.91 m³ |
| Tilt | 30° | 30° | 30° |
| Panel bottom / post top | 600 / 2,666 mm | 600 / 2,641 mm | 600 / 2,641 mm |
| Panel field size | 10,720 × 3,740 mm | 10,720 × 3,755 mm | 10,720 × 3,755 mm |
| Row spacing between tables (no shade on 21 December) | 12,640 mm at noon · 14,210 mm ±2 h | 14,010 mm at noon · 16,180 mm ±2 h | 15,360 mm at noon · 18,250 mm ±2 h |
| Steel | 574.0 kg | 531.5 kg | 540.1 kg |
| Bolts | M10 — 146, M8 — 66 | M10 — 118, M8 — 66 | M10 — 118, M8 — 66 |
| Panel clamps | end 12, middle 54 | end 12, middle 54 | end 12, middle 54 |
| Materials | 79,313 UAH | 75,229 UAH | 74,494 UAH |
| With installation and delivery | 111,690 UAH | 107,739 UAH | 107,004 UAH |
| Per 1 kW | 8,864 UAH/kW | 8,551 UAH/kW | 8,492 UAH/kW |
| Yield | 1,266 kWh/kW · 15,957 kWh/year | 1,139 kWh/kW · 14,349 kWh/year | 1,043 kWh/kW · 13,143 kWh/year |
| Strength σ/fy | 51% | 73% | 78% |
| Deflection / (L/200) | 37% | 58% | 62% |
| Rafter strength | 78% | 74% | 79% |
| Post utilisation | 20% | 36% | 39% |
| Utilisation | 90% | 91% | 91% |
| Depth vs frost depth | ok | ok | ok |
| Checks overall | with a caution | with a caution | with a caution |
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 × 1 100: 0.138 m³ of concrete per post. Wind uplift on the front post ≈ 12.0 kN (with γ=1.5) vs ≈ 13.4 kN (concrete weight + soil friction, estimate) → 90%.Cherkasy: Foundation Ø400 × 1 300: 0.163 m³ of concrete per post. Wind uplift on the front post ≈ 14.4 kN (with γ=1.5) vs ≈ 15.8 kN (concrete weight + soil friction, estimate) → 91%.Chernihiv: Foundation Ø350 × 1 500: 0.144 m³ of concrete per post. Wind uplift on the front post ≈ 14.0 kN (with γ=1.5) vs ≈ 15.5 kN (concrete weight + soil friction, estimate) → 91%.
Bill of materials
The parts of one table for the median zone (Cherkasy): mark, name, profile, cut length, quantity.
| Mark | Part | Profile | Length, mm | Quantity |
|---|---|---|---|---|
| П1 | Front post | Tube 60×60×2 | 2,511 | 6 |
| П2 | Rear post | Tube 60×60×2 | 3,966 | 6 |
| Кр1 | Rafter (inclined beam) | C-channel 100×50×2.5 | 5,015 | 6 |
| Пк1 | Frame strut | C-channel 60×40×2 | 2,137 | 6 |
| Пк2 | Front frame strut | C-channel 60×40×2 | 2,821 | 6 |
| Х1 | Longitudinal brace (cross) | C-channel 60×40×2 | 2,851 | 4 |
| Р1 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 3 |
| Р2 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 3 |
| Р3 | Purlin (rail) | C-channel 60×40×2 | 4,720 | 3 |
| Р4 | Purlin (rail) | C-channel 60×40×2 | 4,720 | 3 |
| — | Bolt M10×80 / M10×25 set · frame and struts / purlins, braces, connectors | — | — | 32 |
| — | Bolt M10×90 set · strut to post — through spacer inserts | — | — | 6 |
| — | Bolt M10×120 set · purlin to rafter | — | — | 36 |
| — | Bolt M10×130 set · post–rafter, strut to post — through spacer inserts | — | — | 30 |
| — | Bolt M10×140 set · strut to rafter — through spacer inserts | — | — | 6 |
| — | Bolt M10×150 set · brace to post — through spacer inserts | — | — | 8 |
| — | End clamp 30 mm | — | — | 12 |
| — | Mid clamp (30–40 mm) | — | — | 54 |
| — | Bolt M8×50 + channel nut | — | — | 66 |
| — | Concrete for 12 posts, Ø400×1300 | — | — | 2.16 m³ |
Profile cutting
35 bars of 6,000 mm, 174.4 m of profile in total.
- Tube 60×60×29 bars
- C-channel 100×50×2.56 bars
- C-channel 60×40×220 bars
Estimated cost
The engine's materials estimate for the median zone (Cherkasy).
- Materials
- 75,229₴
- With installation and delivery
- 107,739₴
- Per 1 kW
- 8,551UAH/kW
The engine's estimate has 25 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, ≈ 14,349 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.