A 10 kW ground-mounted solar plant in Mykolaiv: structure, materials, cost

18 Ulica UL-620M-132DDGN (dual glass bifacial) panels (11.16 kW) on 1 table of 2 × 9. Snow and wind per the DBN for Mykolaiv: S₀ 870 Pa, W₀ 470 Pa.

Power: 11.16kW
Steel: 371.5kg
Posts: 14
Bolts: 136
Materials: 50,842₴
Yield: 13,930kWh/year

Ground frame designer

Design the 10 kW plant in the builder

Opens the 2 × 9 table with the Ulica UL-620M-132DDGN (dual glass bifacial) panel and the loads for Mykolaiv.

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 × 9 = 18 panels
Loads (DBN V.1.2-2:2006)	snow S₀ 870 Pa, wind W₀ 470 Pa, frost depth 0.6 m
Posts	Tube 60×60×2
Rafters	C-channel 60×40×2
Purlins and braces	C-channel 60×40×2
Frames	7 frames, pitch up to 1,670 mm
Posts	14
Footings (bored concrete)	14 pcs, Ø400 mm, depth 900 mm
Concrete	1.74 m³
Tilt	30°
Panel bottom / post top	600 / 2,287 mm
Panel field size	10,506 × 3,102 mm
Row spacing between tables (no shade on 21 December)	10,880 mm at noon · 12,270 mm ±2 h
Steel	371.5 kg
Bolts	M10 — 96, M8 — 40
Panel clamps	end 8, middle 32
Materials	50,842 UAH
With installation and delivery	79,824 UAH
Per 1 kW	7,153 UAH/kW
Yield	1,248 kWh/kW · 13,930 kWh/year

Checks and cautions

Check	Value	Status
Strength σ/fy	48%	passes
Deflection / (L/200)	32%	passes
Rafter strength	83%	with a caution
Post utilisation	16%	passes
Utilisation	99%	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 83%.
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 Ø400 × 900: 0.113 m³ of concrete per post. Wind uplift on the front post ≈ 10.8 kN (with γ=1.5) vs ≈ 10.9 kN (concrete weight + soil friction, estimate) → 99%.

Bill of materials

Mark	Part	Profile	Length, mm	Quantity
П1	Front post	Tube 60×60×2	2,074	7
П2	Rear post	Tube 60×60×2	3,212	7
Кр1	Rafter (inclined beam)	C-channel 60×40×2	3,924	7
Пк1	Frame strut	C-channel 60×40×2	1,818	7
Х1	Longitudinal brace (cross)	C-channel 60×40×2	2,354	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	4,506	2
Р4	Purlin (rail)	C-channel 60×40×2	4,506	2
—	Bolt M10×25 set · purlins, braces, connectors	—	—	18
—	Bolt M10×80 set · purlin to rafter	—	—	28
—	Bolt M10×90 set · strut to post — through spacer inserts	—	—	7
—	Bolt M10×130 set · post–rafter — through spacer inserts	—	—	28
—	Bolt M10×140 set · strut to rafter — through spacer inserts	—	—	7
—	Bolt M10×150 set · brace to post — through spacer inserts	—	—	8
—	End clamp 30 mm	—	—	8
—	Mid clamp (30–40 mm)	—	—	32
—	Bolt M8×50 + channel nut	—	—	40
—	Concrete for 14 posts, Ø400×900	—	—	1.74 m³

Profile cutting

24 bars of 6,000 mm, 128.6 m of profile in total.

Tube 60×60×27 bars
C-channel 60×40×217 bars

Estimated cost

Materials: 50,842₴
With installation and delivery: 79,824₴
Per 1 kW: 7,153UAH/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: 1,248 kWh per 1 kW a year, ≈ 13,930 kWh a year in total for Mykolaiv (tilt 30°, the optimum for the latitude is 34.4°).

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.