Solar irrigation & pumping
Direct-drive and battery-backed solar pump systems for borehole, surface and pivot irrigation. Sized for your actual water requirements, not generic pump specs.
Borehole Surface Pivot
AGRICULTURAL & IRRIGATION ENERGY
Purpose-designed solar and hybrid systems for irrigation, processing, cold storage and remote farm operations, engineered to handle the real demands of agricultural production.
01 / THE CHALLENGE
South African agriculture runs on energy: pumps, pivots, cold chain, processing equipment, packing facilities, worker accommodation. And that energy is increasingly expensive, unreliable and unavailable in the areas where it is needed most.
A farm is not one load. It is a dozen of them, each with its own duty cycle, each pulling hardest at a different point in the season, and a single outage in the wrong week costs more than the power ever did.
SA Solar designs energy systems that work in the field: robust, efficient, and built for the specific load profiles and environmental conditions of South African farming operations.
Load inventory
Every one of these has a different profile, a different tolerance for interruption, and a different answer. We size against all of them, not against a headline kilowatt figure.
Borehole pumps Centre pivots Surface irrigation Cold rooms Pack houses Processing lines Worker accommodation Security & lighting Workshops
02 / OUR AGRICULTURAL SOLUTIONS
Four system types, specified around the work the farm has to do. Most operations end up with more than one of them, tied into a single design.
Direct-drive and battery-backed solar pump systems for borehole, surface and pivot irrigation. Sized for your actual water requirements, not generic pump specs.
Borehole Surface Pivot
Reliable power for refrigeration, cold chain and processing equipment, where power interruptions mean product losses.
Refrigeration Cold chain Processing
Worker accommodation, packing sheds, security, lighting and auxiliary systems, fully solar-powered or hybrid with battery backup.
Accommodation Packing sheds Security & lighting
Full off-grid solutions for farms and stations far from reliable grid infrastructure. Designed to eliminate diesel generator dependency.
Remote stations Hybrid Diesel replacement
03 / SOUTH AFRICAN CONDITIONS
Pumping hours and refrigeration load rise in the hot, dry months, the same months the solar resource is at its strongest. The Northern Cape and the interior carry the highest irradiance in the country, which is why we size a farm against its local figure rather than a national average.
Selected province
Hover or select a province to compare its solar resource. Marked points are the major load centres we design against.
Irradiance
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Specific yield
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10 kWp array
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Provincial averages from public irradiance data, converted at a performance ratio of 0.80. Site-specific yield is modelled per project.
04 / HOW WE WORK
The same process we run on every project, applied to a working farm, with the assessment built around your pumping schedule, your cold-chain duty and the months that actually hurt.
We start by understanding your usage, tariff structure, site constraints and goals: pump duty, irrigation hours, cold-chain load and seasonal peaks. No assumptions. No generic proposals.
Our in-house team designs a system around your actual needs. Correct sizing, quality components, optimised for savings and long-term performance.
Professional installation by qualified electricians and certified solar engineers. We work to deadline, communicate throughout, and take responsibility for the outcome.
Full system commissioning, documentation and training. You understand what you have, how it works, and what to expect.
Monitoring, maintenance and warranty management. We remain your energy partner long after installation.
Undersize the system and the pumps stop when the season is at its tightest. Oversize it and you have paid for capacity the crop never needed. We will not win work by cutting corners on either side of that line.
GET STARTED
Tell us what the farm runs and where it runs it. We will assess the site, model the case honestly, and design the system the operation actually needs.
TWENTY-FOUR HOURS, ONE REVOLUTION
A circular chart recorder, the instrument that hangs on a substation wall. Add array and watch the belly of the net-load curve press inward toward the hub. Cross the hub and you are exporting. The evening peak never moves — which is the whole argument for storage.
Season
Clear-sky reduction (Cooper declination, Kasten–Young air mass), performance ratio 0.80, latitude 28.5° S. Farm load shape is representative of an irrigation and pack-house operation.
THE OLDEST INSTRUMENT
The tip of a shadow traces a conic section — a straight line at the equinox, a hyperbola either side of it. The winter solstice curve is the one that sizes your array, because keeping rows unshaded from 09:00 to 15:00 in June is what sets the pitch. Sundial and row spacing are the same equations.
Winter solstice, 09:00–15:00 solar time, east–west rows, 4.4 m chord. Cooper declination.
THE OTHER HALF OF THE LIGHT
About a fifth of a clear day arrives as diffuse light scattered from the whole sky, and under cloud it is all of it. Diffuse light does not care where the sun is, only how much sky the module can see. The dome is divided into the 145 standard patches used in daylight modelling.
145 Tregenza patches, anisotropic clear-sky radiance brighter near the horizon. Diffuse taken as 18% of annual energy.
THE SUN IS NOT A POINT
The sun is a disc half a degree across, so an obstruction throws an umbra and a penumbra. Move the obstruction further away and its shadow does not just move, it blurs. Because cells sit in series, a soft edge across several cells can cost more than a hard edge that kills one.
Visible fraction of the solar disc computed as a circle–circle overlap at every sample point, then reduced through three bypass groups.