REC
Ground frame for 5 REC Alpha Pure 2 REC420AA Pure 2 (HJT) panels (1×5)
1 row of 5 panels, 2.10 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
- 2.10kW
- Steel
- 110.3kg
- Posts
- 8
- Bolts
- 54
- Materials
- 20,045₴
- Yield
- 2,391kWh/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 1 × 5 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 | C-channel 80×40×2 | Tube 60×60×2 |
| Rafters | C-channel 60×40×2 | C-channel 80×40×2 | C-channel 60×40×2 |
| Purlins and braces | C-channel 41×41×2.5 | C-channel 41×41×2.5 | C-channel 41×41×2.5 |
| Frames | 4 frames, pitch up to 1,640 mm | 4 frames, pitch up to 1,640 mm | 4 frames, pitch up to 1,640 mm |
| Posts | 8 | 8 | 8 |
| Footings (bored concrete) | 8 pcs, Ø300 mm, depth 900 mm | 8 pcs, Ø300 mm, depth 1,100 mm | 8 pcs, Ø300 mm, depth 1,300 mm |
| Concrete | 0.56 m³ | 0.68 m³ | 0.81 m³ |
| Tilt | 30° | 30° | 30° |
| Panel bottom / post top | 600 / 1,185 mm | 600 / 1,177 mm | 600 / 1,185 mm |
| Panel field size | 5,420 × 1,156 mm | 5,420 × 1,161 mm | 5,420 × 1,156 mm |
| Row spacing between tables (no shade on 21 December) | 4,190 mm at noon · 4,710 mm ±2 h | 4,640 mm at noon · 5,360 mm ±2 h | 5,090 mm at noon · 6,040 mm ±2 h |
| Steel | 124.0 kg | 110.3 kg | 135.5 kg |
| Bolts | M10 — 42, M8 — 12 | M10 — 42, M8 — 12 | M10 — 42, M8 — 12 |
| Panel clamps | end 4, middle 8 | end 4, middle 8 | end 4, middle 8 |
| Materials | 18,341 UAH | 20,045 UAH | 20,887 UAH |
| With installation and delivery | 24,856 UAH | 26,560 UAH | 27,402 UAH |
| Per 1 kW | 11,836 UAH/kW | 12,648 UAH/kW | 13,049 UAH/kW |
| Yield | 1,266 kWh/kW · 2,660 kWh/year | 1,139 kWh/kW · 2,391 kWh/year | 1,043 kWh/kW · 2,191 kWh/year |
| Strength σ/fy | 58% | 81% | 88% |
| Deflection / (L/200) | 48% | 66% | 71% |
| Rafter strength | 7% | 7% | 11% |
| Post utilisation | 3% | 11% | 5% |
| Utilisation | 47% | 34% | 28% |
| Depth vs frost depth | ok | ok | ok |
| Checks overall | passes | 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.
- 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 1 640 mm, 4 frames. Purlin C-channel 41×41×2.5: strength 81%, deflection 66% of L/200 (snow on panel 977 Pa).Chernihiv: Frame spacing 1 640 mm, 4 frames. Purlin C-channel 41×41×2.5: strength 88%, deflection 71% of L/200 (snow on panel 1 106 Pa).
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 | C-channel 80×40×2 | 1,941 | 4 |
| П2 | Rear post | C-channel 80×40×2 | 2,302 | 4 |
| Кр1 | Rafter (inclined beam) | C-channel 80×40×2 | 1,245 | 4 |
| Пк1 | Frame strut | C-channel 41×41×2.5 | 859 | 4 |
| Х1 | Longitudinal brace (cross) | C-channel 41×41×2.5 | 1,758 | 4 |
| Р1 | Purlin (rail) | C-channel 41×41×2.5 | 5,420 | 2 |
| — | Bolt M10×65 set · brace crossing | — | — | 2 |
| — | Bolt M10×80 set · strut to post — through spacer inserts | — | — | 4 |
| — | Bolt M10×90 set · post–rafter — through spacer inserts | — | — | 16 |
| — | Bolt M10×100 set · purlin to rafter | — | — | 8 |
| — | Bolt M10×120 set · brace to post — through spacer inserts | — | — | 4 |
| — | Bolt M10×150 set · strut to rafter — through spacer inserts | — | — | 4 |
| — | Bolt M10×180 set · brace to post — through spacer inserts | — | — | 4 |
| — | End clamp 30 mm | — | — | 4 |
| — | Mid clamp (30–40 mm) | — | — | 8 |
| — | Bolt M8×50 + channel nut | — | — | 12 |
| — | Concrete for 8 posts, Ø300×1100 | — | — | 0.68 m³ |
Profile cutting
8 bars of 6,000 mm, 43.3 m of profile in total.
- C-channel 80×40×24 bars
- C-channel 41×41×2.54 bars
Estimated cost
The engine's materials estimate for the median zone (Cherkasy).
- Materials
- 20,045₴
- With installation and delivery
- 26,560₴
- Per 1 kW
- 12,648UAH/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, ≈ 2,391 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.