By Vvon Engineering Team | Published | Updated
Compare crop-level light, machinery clearance, soil, runoff and electricity value before piloting agrivoltaics in Bangladesh.
Solar EPC & street lighting RFQ checklist (TXT)
Agrivoltaic design trades electricity density, structure and farm access against continued agricultural production. Compare both outputs and their costs instead of maximising kWp per hectare alone.
Agrivoltaics combines farming and solar on the same site. It can help manage land-use competition, but does not automatically resolve crop, livelihood or environmental concerns.
In an agrivoltaic system, solar panels are mounted on raised structures (typically 2–4 metres above ground) with wider spacing than conventional ground-mounted solar. This allows sunlight to reach the crops below, either directly through the gaps between panels, or as diffuse light that passes through semi-transparent panels. The partial shading provided by the panels can actually benefit certain crops by reducing heat stress, water evaporation, and soil moisture loss.
Clearance must suit machinery and workers. Height, row pitch, orientation and tracking jointly determine the pattern of light at crop level; height alone does not guarantee evenly distributed shade.
Get both decided from the crop plan before anyone draws a single line electrical diagram. Retrofitting height into a structure that has already been costed is not a small change: it drives foundation size, member sections, wind loading and the whole erection method.
| Crop group | Evidence needed before committing land |
|---|---|
| Leafy vegetables | Local cultivar, season, light requirement and pilot yield/quality. |
| Root crops | Light, soil moisture and machinery access. |
| Legumes | Cultivar-specific light response and harvest access. |
| Rice | Water management, machinery, seasonal shading and a local comparative trial. |
| Fruit crops | Yield, quality, disease and support/harvest arrangements. |
| Herbs or nursery crops | Species-specific growing conditions and marketable output. |
Crop response varies with cultivar, season and management. Shade tolerance is not a guarantee of higher yield, and a result from another climate should not be presented as a Bangladesh forecast.
Before scaling, ask for a local trial with a suitable unshaded control and records of marketable yield, quality, water use and farm labour. Verify any claimed pilot through its published report and responsible institution.
The structural design should use measured ground conditions, wind and flood exposure plus machinery clearances. Raised arrays can increase structural demands, but the appropriate foundations must be calculated for the actual site.
Map runoff and infiltration below the array. Concentrated drips and shaded strips can create different soil conditions; select mitigation with the agronomist and drainage designer rather than assuming one gutter detail solves every plot.
Compare annual crop income and cost with solar generation value, added structural cost, maintenance and connection expense. A grid tariff is not automatically an export purchase price, and generation is not the same as cash income.
Three things decide whether that figure is real on a given plot, and none of them is the panel. First, the connection: on a rural feeder the constraint is usually what the distribution utility will accept for export, not what the array can produce, and that approval has to be pursued before the structure is ordered. Second, tenure: a 25-year steel structure cannot sensibly be built by a sharecropper on someone else's land, so the ownership of the land, the crop and the electricity have to be three settled questions with three named parties. Third, exit: what happens to the structure at the end of the arrangement, who removes it, and what condition the land is returned in.
Potential pilot sites include nurseries and agro-processing facilities with suitable rights and a defined electricity use. Compare each with its existing crop system; do not assume that paddy or another crop is universally unsuitable or profitable.
Consult the relevant edition and the documents for the exact equipment and site: US Department of Energy: agrivoltaics and agricultural co-location; FAO: benefits and groundwater risks of solar-powered irrigation; Power Division / SREDA: Net Metering Guidelines 2025, English.
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