Ground frame for 5 Maxeon 3 SPR-MAX3-430-R (IBC) panels (1×5)

1 row of 5 panels, 2.15 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: 2.15kW
Steel: 134.0kg
Posts: 8
Bolts: 54
Materials: 18,670₴
Yield: 2,448kWh/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 Maxeon 3 SPR-MAX3-430-R (IBC) panel and the 1 × 5 layout; site — Cherkasy. Change the site, the tilt or the profiles and the checks and estimate are recalculated.

Design the frame Tilt and row spacing

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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	Tube 60×60×2	Tube 60×60×2	Tube 60×60×2
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 1,650 mm	4 frames, pitch up to 1,650 mm	4 frames, pitch up to 1,650 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 / 1,167 mm	600 / 1,167 mm	600 / 1,167 mm
Panel field size	5,450 × 1,125 mm	5,450 × 1,125 mm	5,450 × 1,125 mm
Row spacing between tables (no shade on 21 December)	4,070 mm at noon · 4,570 mm ±2 h	4,510 mm at noon · 5,210 mm ±2 h	4,940 mm at noon · 5,870 mm ±2 h
Steel	128.2 kg	134.0 kg	139.7 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	18,046 UAH	18,670 UAH	20,592 UAH
With installation and delivery	24,861 UAH	25,485 UAH	27,407 UAH
Per 1 kW	11,563 UAH/kW	11,853 UAH/kW	12,747 UAH/kW
Yield	1,266 kWh/kW · 2,723 kWh/year	1,139 kWh/kW · 2,448 kWh/year	1,043 kWh/kW · 2,243 kWh/year
Strength σ/fy	58%	80%	86%
Deflection / (L/200)	47%	65%	70%
Rafter strength	5%	6%	7%
Post utilisation	3%	5%	5%
Utilisation	46%	33%	27%
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 1 650 mm, 4 frames. Purlin C-channel 41×41×2.5: strength 80%, deflection 65% of L/200 (snow on panel 977 Pa).Chernihiv: Frame spacing 1 650 mm, 4 frames. Purlin C-channel 41×41×2.5: strength 86%, deflection 70% 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	Tube 60×60×2	1,941	4
П2	Rear post	Tube 60×60×2	2,292	4
Кр1	Rafter (inclined beam)	Tube 60×60×2	1,212	4
Пк1	Frame strut	C-channel 41×41×2.5	852	4
Х1	Longitudinal brace (cross)	C-channel 41×41×2.5	1,765	4
Р1	Purlin (rail)	C-channel 41×41×2.5	5,450	2
—	Bolt M10×140 / M10×80 set · frame and struts / purlins, braces, connectors	—	—	30
—	Bolt M10×110 set · brace to post — through spacer inserts	—	—	4
—	Bolt M10×150 set · strut to rafter — through spacer inserts	—	—	4
—	Bolt M10×160 set · brace to post — through spacer inserts	—	—	4
—	End clamp 40 mm	—	—	4
—	Mid clamp (30–40 mm)	—	—	8
—	Bolt M8×60 + channel nut	—	—	12
—	Concrete for 8 posts, Ø300×1100	—	—	0.68 m³

Profile cutting

8 bars of 6,000 mm, 43.2 m of profile in total.

Tube 60×60×24 bars
C-channel 41×41×2.54 bars

Estimated cost

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

Materials: 18,670₴
With installation and delivery: 25,485₴
Per 1 kW: 11,853UAH/kW

Prices are the typical market prices built into the Solispec engine, as of 06.10.2026; no margin, no VAT.

All 21 lines of the engine's estimate, with prices

Item	Quantity	Price, UAH	Sum, UAH
Tube 60×60×2, stock length 6 000 mm	4 bar	210	5,040
C-channel 41×41×2.5, stock length 6 000 mm	4 bar	200	4,800
Bolt M10×140 cl. 8.8 set — frame, struts	25 pcs	22	550
Bolt M10×80 cl. 8.8 set — purlins, braces, connectors	10 pcs	22	220
Bolt M10×110 cl. 8.8 set — brace to post — through spacer inserts	4 pcs	27	108
Bolt M10×150 cl. 8.8 set — strut to rafter — through spacer inserts	4 pcs	27	108
Bolt M10×160 cl. 8.8 set — brace to post — through spacer inserts	4 pcs	27	108
End clamp 40 mm	4 pcs	35	140
Mid clamp (30–40 mm)	8 pcs	32	256
Bolt M8×60 A2 + spring channel nut M8	14 pcs	14	196
Post base anchor pin (M10 / rebar Ø12)	8 pcs	20	160
Borehole casing (roofing felt / PVC, 300 mm)	8 pcs	60	480
Crushed stone 20–40 for the bottom of the boreholes	0.06 m³	900	54
Earth electrode: 2 rods Ø16×1.5 m + strip 40×4	1 set	1,500	1,500
Wire PV-3 6 mm² green-yellow	19 m	35	665
Module earthing clip (under the clamp)	5 pcs	20	100
Cable clip, stainless	15 pcs	5	75
Zinc paint / cold galvanising spray 400 ml	1 pcs	350	350
Concrete M200 for posts	0.68 m³	3,800	2,584
Rebar Ø10 (4 bars per post)	42 m	28	1,176
Spacer inserts / packs — pieces of the same profile (from offcuts): 4 × 71 mm, 4 × 70 mm, 4 × 30 mm, 4 × 10 mm	16 pcs	0	0
Materials			18,670

Yield

Yield: 1,139 kWh per 1 kW a year, ≈ 2,448 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.