Solar for Business: What Shops, Resorts and Offices Should Know
Commercial solar is frequently a better investment than residential, and for one structural reason: businesses use power during the day, which is exactly when solar makes it.
Why the load profile matters this much
A house often sits empty from eight to five, so a lot of what the roof makes gets exported at the lower net metering credit. A shop, clinic, office or resort does the opposite. Its heaviest consumption lines up with peak generation.
That means far more of the output is self-consumed at the full retail tariff, and self-consumed kilowatt-hours are worth about double exported ones. Same system, same roof, materially better return on a commercial site.
Put a peso figure on downtime
For a household a brownout is an inconvenience. For a business it has a number, and it's usually bigger than owners guess:
- Lost trade. A dead till for three hours, repeated through a bad season.
- Spoiled stock. Cold storage, chilled display, frozen goods, restaurant inventory.
- Idle staff. Wages carry on whether the lights do or not.
- Ruined processes. A batch lost mid-run, a machine that restarts from zero.
- Guest experience. For a resort, an outage during dinner service is a reputation cost that never shows up on an invoice.
Work out your own hourly cost of being down, multiply by the hours you lost last year. That figure, not the equipment price, is what justifies battery backup commercially.
Where it differs from a house
Three-phase supply
Most commercial premises are three-phase, which affects inverter choice and how the array balances across phases. Routine work, but not the same kit as a house.
Demand charges
Plenty of commercial tariffs bill partly on peak demand, your highest instantaneous draw in the period, rather than just total consumption. Solar reliably cuts energy charges. Whether it touches your demand charge depends on when your peak happens. If it's at 8pm, solar alone won't help, though a battery might.
Who owns the roof
If you lease, the array will outlive most lease terms. Settle it before committing: who owns the system, what happens at the end of the lease, and get the landlord's consent in writing. In our experience this is the single most common reason a commercial project stalls late, and it's never a technical problem.
Your trading pattern
Open seven days? You'll use the array better than somewhere closed on Sundays. Resorts with seasonal occupancy have a load profile that swings hard through the year, and that's worth modelling rather than averaging into a flat number.
Sizing a commercial system
Same principle, more data to work with. Twelve months of bills showing kWh and peak demand tells an installer far more than a walk around the premises will.
Phasing is common and usually sensible: cover the base daytime load first, check the savings against real bills for a season, then extend. Better than sizing optimistically on day one, provided the first design leaves room to grow.
Five questions to settle before anyone quotes
- What does an hour of downtime actually cost us?
- When does our peak demand happen, and are we billed for it?
- Do we own the roof, or do we have written consent?
- Is our load steady all year or seasonal?
- Are we buying a smaller bill, continuity, or both?
We size commercial systems from twelve months of actual bills and quote itemized by component. If you're still weighing backup against bill reduction, start with the system comparison.
Let's do the downtime maths
Most business owners we talk to have never put a peso figure on an hour of being closed. Once they do, the decision usually makes itself.
If you're considering solar for your business, send us twelve months of bills and we'll come back with a sized system, an itemized quote and a realistic view of what it saves. Message us, call, or arrange a site visit — and our counter in Concordia, Bolinao is open if you'd rather start with a conversation.