For a household, an outage is an inconvenience. For a clinic it is a clinical risk. For a restaurant it is spoiled stock and a lost service, for an office it is idle staff, and for a shop it is a closed till. In every one of those cases the electricity bill is the smaller number.
That changes how the system should be specified. A residential design optimises for return on energy cost; a commercial design optimises for continuity and takes the energy saving as the accompanying benefit. Both are legitimate. Specifying one when you needed the other is the error.
Start with the critical load list
Before any sizing, write down what must never stop. Be specific and be ruthless, because everything on this list costs capacity.
| SECTOR | TYPICALLY CRITICAL |
|---|---|
| Clinic or pharmacy | Vaccine and medication refrigeration, diagnostic equipment, sterilisation, lighting in treatment areas, records and connectivity |
| Restaurant or cafe | Cold storage, ventilation, point of sale, card terminals, lighting |
| Office | Server or network cabinet, connectivity, workstation circuits, access control, lighting |
| Shop or supermarket | Refrigeration, point of sale, security and cameras, lighting |
| School | Connectivity, administration, laboratory equipment, lighting, water pumping |
| Hotel or guest house | Water pumping, lighting in circulation areas, reception systems, lifts where fitted |
For a health facility the cold chain usually sits at the top of that list and stays there. Vaccines and temperature-sensitive medication have a defined tolerance, and an interruption long enough to breach it destroys stock that is expensive and sometimes difficult to replace. Sizing the battery against the cold chain rather than against the floor area is the single most useful decision in a clinic design.
The list, rather than your building size, determines the inverter rating and the battery capacity. It also determines the phase configuration, since heavier equipment and larger sites usually need three-phase, available in selected PowerSync™ and PowerGuard™ models from 5 to 20 kW.
Which inverter a business needs
Where the supply is dependable, the operation is daytime and there is no real continuity requirement, GridMax™ does the job: straightforward on-grid generation that cuts purchased electricity during working hours. It will not supply the premises during an outage.
Where the supply is broadly reliable but interrupted often enough to matter, which describes a great many commercial premises in Addis Ababa and the regional towns, PowerSync™ manages solar, battery, grid and backup together, from 5 to 20 kW, single or three-phase, low or high voltage.
And where the supply is limited, unreliable or absent, PowerGuard™ is built for businesses, farms and health facilities that need solar and storage as the primary source, with optional compatible generator input. For a rural clinic or a lodge, this is usually where the design starts.
A commercial site has a genuine advantage over a house: consumption and generation peak at the same hours. More of what the panels produce is used directly, and the battery can be sized for continuity rather than for shifting an entire evening.
Panels, where area is the constraint
Commercial roofs are often large but only partly usable, interrupted by plant, vents, water tanks and access routes. Where the usable area is the limit, panel efficiency stops being a specification detail and becomes the thing that decides whether the system can reach the size you need.
SunCrown™, at 650 to 685 W and up to 25.4% module efficiency, delivers the most power per square metre in the range. SunCore™, at 570 to 650 W, is the better commercial decision where the roof is generous and cost per watt matters more. Where rooftop plant creates recurring shade patterns, the cell-level partial-shading optimisation on the SunCrown platform is doing measurable work rather than adding specification.
Support is part of the specification
For a business the maintenance plan is not an add-on to the system, it is part of it. A six-hour response target is a continuity commitment. A 48-hour one is a maintenance schedule. Choose deliberately.
Platinum cover is built for exactly this class of site: villas, clinics, restaurants, schools, offices and high-dependency businesses. It provides six scheduled visits a year, a response target within six hours, up to three qualifying emergency visits, advanced inverter, battery and electrical checks, monthly remote-monitoring review where the system is connected, one annual thermal scan of accessible electrical equipment, and quarterly performance summaries with an annual system-health report. It includes 24/7 first-level phone or WhatsApp support, with on-site timing dependent on location and availability.
The Premium Solar Package includes a year of Platinum cover, which is usually why it is the right starting point for a commercial enquiry.
What to prepare before the survey
- Twelve months of electricity bills, so consumption is measured rather than estimated.
- Your critical load list, with equipment ratings if you have them, and the cold chain identified separately if you hold one.
- An honest account of how often the supply fails, and for how long.
- Roof access details: height, structure, existing plant, and whether specialist access is needed.
- Any expansion planned in the next two years, so the design leaves room for it.
Common questions
Is solar worth it for a small business?
Commercial sites often show a stronger case than homes, because consumption peaks during daylight when generation does, so more solar energy is used directly. Where downtime carries a cost, the continuity benefit typically outweighs the energy saving.
Can solar keep a clinic running during a power cut?
A correctly designed hybrid or off-grid system with compatible battery storage can support selected essential loads during an interruption. Vaccine and medication refrigeration, lighting, diagnostic equipment and connectivity are typically prioritised, with capacity sized to the tolerable outage duration.
Do I need a three-phase inverter?
It depends on your existing supply and equipment. Larger sites and heavier machinery usually require three-phase. PowerSync™ and PowerGuard™ are available in selected single and three-phase, low and high voltage configurations from 5 to 20 kW.
How long does a commercial installation take?
It depends on system size, roof condition, electrical work and site access. Straightforward installations complete within a few working days, while larger or more complex projects need longer. The installation plan is confirmed before work begins.
What maintenance does a commercial system need?
More than a home system, because downtime costs more. Platinum cover provides six scheduled visits per year, a six-hour response target, advanced electrical checks and an annual thermal scan of accessible equipment.
