A 15 kW ground-mounted solar plant in Ivano-Frankivsk: structure, materials, cost

26 Ulica UL-620M-132DDGN (dual glass bifacial) panels (16.12 kW) on 1 table of 2 × 13. Snow and wind per the DBN for Ivano-Frankivsk: S₀ 1,410 Pa, W₀ 500 Pa.

Power: 16.12kW
Steel: 561.8kg
Posts: 22
Bolts: 208
Materials: 72,106₴
Yield: 18,725kWh/year

Ground frame designer

Design the 15 kW plant in the builder

Opens the 2 × 13 table with the Ulica UL-620M-132DDGN (dual glass bifacial) panel and the loads for Ivano-Frankivsk.

Design the frame Snow and wind calculator

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Snow and wind check
Drawings and estimate

Panel

Ulica UL-620M-132DDGN (dual glass bifacial): 620 W, 2,382 × 1,134 mm, portrait.

The table's structure

Layout	1 table, each 2 × 13 = 26 panels
Loads (DBN V.1.2-2:2006)	snow S₀ 1,410 Pa, wind W₀ 500 Pa, frost depth 0.7 m
Posts	Tube 60×60×2
Rafters	C-channel 60×40×2
Purlins and braces	C-channel 60×40×2
Frames	11 frames, pitch up to 1,470 mm
Posts	22
Footings (bored concrete)	22 pcs, Ø350 mm, depth 1,000 mm
Concrete	2.33 m³
Tilt	30°
Panel bottom / post top	600 / 2,287 mm
Panel field size	15,122 × 3,102 mm
Row spacing between tables (no shade on 21 December)	11,660 mm at noon · 13,390 mm ±2 h
Steel	561.8 kg
Bolts	M10 — 152, M8 — 56
Panel clamps	end 8, middle 48
Materials	72,106 UAH
With installation and delivery	113,236 UAH
Per 1 kW	7,025 UAH/kW
Yield	1,162 kWh/kW · 18,725 kWh/year

Checks and cautions

Check	Value	Status
Strength σ/fy	49%	passes
Deflection / (L/200)	28%	passes
Rafter strength	96%	with a caution
Post utilisation	19%	passes
Utilisation	98%	with a caution
Depth vs frost depth	ok	passes

Rafter profileThe rafter is used above 80 %, or the frame's posts stand far apart: the structure passes, but the margin is small.Rafter C-channel 60×40×2: span between posts 2 276, cantilever 824 mm → strength 96%.
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.Foundation Ø350 × 1 000: 0.096 m³ of concrete per post. Wind uplift on the front post ≈ 10.1 kN (with γ=1.5) vs ≈ 10.3 kN (concrete weight + soil friction, estimate) → 98%.

Bill of materials

Mark	Part	Profile	Length, mm	Quantity
П1	Front post	Tube 60×60×2	2,174	11
П2	Rear post	Tube 60×60×2	3,312	11
Кр1	Rafter (inclined beam)	C-channel 60×40×2	3,924	11
Пк1	Frame strut	C-channel 60×40×2	1,818	11
Х1	Longitudinal brace (cross)	C-channel 60×40×2	2,213	4
Р1	Purlin (rail)	C-channel 60×40×2	6,000	2
Р2	Purlin (rail)	C-channel 60×40×2	6,000	2
Р3	Purlin (rail)	C-channel 60×40×2	6,000	2
Р4	Purlin (rail)	C-channel 60×40×2	6,000	2
Р5	Purlin (rail)	C-channel 60×40×2	3,122	2
Р6	Purlin (rail)	C-channel 60×40×2	3,122	2
—	Bolt M10×25 set · purlins, braces, connectors	—	—	34
—	Bolt M10×80 set · purlin to rafter	—	—	44
—	Bolt M10×90 set · strut to post — through spacer inserts	—	—	11
—	Bolt M10×130 set · post–rafter — through spacer inserts	—	—	44
—	Bolt M10×140 set · strut to rafter — through spacer inserts	—	—	11
—	Bolt M10×150 set · brace to post — through spacer inserts	—	—	8
—	End clamp 30 mm	—	—	8
—	Mid clamp (30–40 mm)	—	—	48
—	Bolt M8×50 + channel nut	—	—	56
—	Concrete for 22 posts, Ø350×1000	—	—	2.33 m³

Profile cutting

34 bars of 6,000 mm, 192.9 m of profile in total.

Tube 60×60×211 bars
C-channel 60×40×223 bars

Estimated cost

Materials: 72,106₴
With installation and delivery: 113,236₴
Per 1 kW: 7,025UAH/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: 1,162 kWh per 1 kW a year, ≈ 18,725 kWh a year in total for Ivano-Frankivsk (tilt 30°, the optimum for the latitude is 35.1°).

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.