How to size your home's solar system in BCS

To size a home solar system in Baja California Sur, start from how much electricity you actually use — the kWh on your CFE bill — not from your roof or the size of your house. The right system offsets the share of your consumption you want to eliminate, and the single biggest factor is whether your usage has pushed you onto CFE's high-consumption DAC tariff.

Start with your kWh, not your roof

Pull six to twelve months of CFE bills and look at your kWh consumption, not the peso total. Averaging a full year matters in BCS because summer air-conditioning sends usage far above winter — sizing only off a cool month leaves you short when you need power most. That annual average kWh figure is what we design the array around.

Why the DAC tariff changes everything

Mexican households that exceed a consumption threshold lose their government subsidy and move to the DAC tariff (Tarifa Doméstica de Alto Consumo), where each kWh costs dramatically more. If AC has pushed you into DAC, solar's value isn't just shaving the bill — it's sizing the system to pull your billed consumption back below the DAC threshold, which can transform your payback. We check your tariff first because it often decides how big a system makes sense. (Thresholds vary by region and season.)

Roof, shade, and orientation

Once we know your target offset, the roof decides what's practical: usable unshaded area, orientation, and tilt. South-facing, shade-free space produces the most, but we work with real roofs — partial shade, multiple planes, and flat roofs with tilt mounts are all normal here. If the roof can't fit the full target, ground mounts or a phased approach are options.