Commercial solar depends on operating hours, load profile, roof or ground space and the cost of interruption. Start with the business solutions overview and build the enquiry around your numbers.
In hospitality, the guest experience is the product, and nothing wrecks it faster than a dark room at 6pm. A traveller who's paid good money for a night away doesn't want to grope for a light switch, find the wifi down, take a cold shower, or watch dinner service collapse because the kitchen lost power. Worse, in the age of Booking.com and Google reviews, a single load-shedding-ruined stay can turn into a one-star review that costs you bookings for months.
For a guesthouse or B&B, solar isn't a green nice-to-have. It protects the two things your business runs on: your margins and your reputation. A well-designed system keeps the lights, wifi, hot water and security running through every blackout, while quietly cutting one of your biggest fixed costs. Here's how to think about it.
Key takeaways
In hospitality, reliability protects reviews and repeat bookings, often worth more than the bill saving itself.
Guest loads peak in the evening, so battery storage carries real weight in the design.
A silent solar-and-battery system beats a noisy, smelly generator that guests can hear from their rooms.
Section 12B lets your guesthouse business deduct the cost of the installation against taxable income.
Alumo scales from a home-style system such as The Power Bae for a small B&B up to the Energy Efficiency business package.
Why load-shedding hits hospitality hardest
Your guests are paying for comfort
A factory can sometimes shrug off an outage and catch up later. A guesthouse can't. Your guests are physically present, awake in the evening, and expecting everything to just work. Load-shedding during check-in, dinner or bedtime lands directly on the experience you sold them. The stakes are immediate and personal in a way most businesses never face.
Reviews are the multiplier
The modern traveller books on trust signals, and reviews are the biggest one. "The power was off half the night and there was no backup" is the kind of line that sinks a listing. Flip it around and "no load-shedding here, everything ran perfectly" has become a genuine selling point that guesthouses now advertise. Solar turns reliability into a marketing asset.
Generators are a poor fix
Plenty of guesthouses bought a generator and regretted it. They're loud, and the drone carries straight into the rooms you're trying to keep peaceful. They smell of diesel, need refuelling at awkward hours, and cost a fortune to run. A solar-and-battery system does the same job silently and automatically, switching over in milliseconds so guests never notice the grid dropped at all.
Designing solar for a guesthouse
The evening peak
Hospitality has a distinctive load shape. Your busiest power hours are the evening: lights across every room, TVs, dinner in the kitchen, guests charging devices, geysers recovering after the shower rush. That's the opposite of an office, and it means battery storage is central to the design. You're banking cheap daytime solar to spend during the evening peak and overnight.
The loads that must never drop
Some things in a guesthouse simply can't go dark:
Wifi and the router. Arguably the first thing a modern guest checks, and a common review complaint.
Security. Electric fencing, gate motors, alarms and cameras protect guests and property.
Lighting and safety. Corridors, stairs and outdoor paths need to stay lit.
Hot water. A cold shower is a guaranteed complaint (more on geysers below).
The kitchen and reception. Where your service actually happens.
A good design prioritises these essential circuits so they ride through any outage, even if a few non-essentials are left off the backup.
Hot water is its own decision
Geysers are power-hungry, and heating water with a battery-backed PV system can be wasteful if you're not careful. Many guesthouses pair solar PV with dedicated water heating (solar geysers or heat-pump systems) so the biggest single load is handled efficiently and the battery is reserved for lighting, wifi and electronics. It's worth discussing your hot-water strategy explicitly during the assessment.
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A guesthouse or B&B is a business, and a solar installation used to earn income qualifies under Section 12B of the Income Tax Act. That lets the business deduct the cost of the system against its taxable income, lowering your tax bill and the real, after-tax cost of the installation.
For a profitable establishment, this materially improves the payback: the tax system effectively shares the cost of the equipment. As with any tax matter, it only helps a business paying tax on real profit, and the detail depends on how your guesthouse is structured, so bring your accountant in early. For most established operations, Section 12B is a strong point in solar's favour.
Right-sizing: from a small B&B to a country lodge
The right system depends entirely on your scale.
Alumo's current solar-plus-battery rent-to-own range uses a Solis 5kW inverter and Eenovance 5.32kWh battery: Watt-a-Deal has three 615W panels from R1,418/month, The Big Watt has four from R1,487/month, and The Power Bae has six from R1,626/month on a seven-year term. Three- and five-year prices, solar-only configurations and battery-only pricing are available on our current package comparison.
A larger guesthouse or boutique lodge, with many rooms, a commercial kitchen, a pool, extensive grounds and security, moves into commercial territory. Alumo's Energy Efficiency business package (around 120kWh of battery and a 50.05 kWp array, with the inverter sized in the proposal, from about R18,000/month) is built for that kind of continuous, evening-heavy demand.
80kW
inverter
120kWh
battery storage
50 kWp
solar array
The honest answer is that hospitality sizing rewards a proper assessment more than most, because occupancy and load vary so much between establishments. Twelve months of electricity bills and a walk-through of your essential circuits will produce a far better design than any rule of thumb. Get a free quote → to have a system matched to your rooms and occupancy.
Turning solar into a booking advantage
Once your system is in, use it. Add "uninterrupted power, no load-shedding" to your listing, your website and your booking confirmations. It reassures nervous travellers and sets you apart from the guesthouse down the road that still goes dark at 8pm. In a market where guests actively filter for backup power, a silent, reliable solar system is a reason to book you, not just a cost saving.
Ready to protect your reviews and your margins?
Free planning tool
Solar finance and payback calculator
Compare cash payback with a financed system, using your own bill, tariff and assumptions.
R 2 500
R 110 000
70%
Payment route
Cash payback
5.2 years
20-year net saving
R 851 001
Year-one saving
R 1 750/mo
Estimated array
4.4 kW
About 8 × 550 W panels
Roughly 23.3 m² of usable roof
Indicative scenario only. It excludes finance fees, tax effects, maintenance, export credits and site-specific generation. The assumptions are visible below so the result can be challenged instead of treated as a quote.
With a properly designed solar-and-battery system, no. A hybrid inverter switches from grid to battery in milliseconds, fast enough that lights don't flicker and the wifi doesn't drop. Your guests carry on with their evening completely unaware the grid went down, which is exactly the point.
Do I need to back up the whole guesthouse or just some circuits?
Most designs back up the essential circuits (lighting, wifi, security, reception, the kitchen) while leaving some heavy non-essential loads off the backup to keep the battery lean. Hot water is often handled separately with a solar geyser or heat pump. A site assessment maps which circuits matter most to your guest experience.
Can I claim solar against tax for my guesthouse?
Yes. As a business earning income, your guesthouse can use the Section 12B deduction to write off the cost of a qualifying solar installation against taxable income, reducing your tax bill. It applies to a business making taxable profit, and the specifics depend on your structure, so confirm with your accountant before committing.
Is solar better than a generator for a guesthouse?
For hospitality, almost always. A generator is noisy, smells of diesel, needs refuelling and switches over with a gap, all of which guests notice. A solar-and-battery system runs silently, kicks in instantly, and has no fuel cost. Many guesthouses that once relied on a generator now keep it only as a rare last resort, if at all.
Who installs and warrants the system?
Alumo supplies, installs, finances and warrants the system, from residential-scale packages such as The Power Bae up to the commercial Energy Efficiency tier. SolarGuide is an independent referral partner. We help you compare options and get a free quote. All pricing is indicative and subject to a site assessment and credit approval.
SolarGuide is an independent referral partner. We help you compare options and arrange a free quote — Alumo supplies, installs, finances and warrants the systems. Pricing is indicative, sourced from Alumo’s published catalogue, and subject to a site assessment and credit approval.
