Design, size, and price your off-grid photovoltaic system with professional-grade tools — built for homeowners, installers, and rural pioneers alike.
Off-grid solar systems represent more than independence from utility bills — they're a foundational technology for sustainable living, rural electrification, and energy resilience.
The off-grid solar market is projected to surpass USD 12 billion by 2030, driven by rural electrification programs, falling storage costs, and growing climate awareness. Sub-Saharan Africa, Southeast Asia, and Latin America lead adoption, but developed-country markets show surging demand for energy resilience.
Modern LFP batteries have dropped in cost by over 85% since 2015. Unlike lead-acid predecessors, lithium batteries support deeper discharge (80–90% DoD), charge faster, require zero maintenance, and tolerate high temperatures — making them the preferred choice for off-grid residential and commercial systems worldwide.
PERC, TOPCon, and HJT panel technologies now routinely achieve 22–24% conversion efficiency in commercial products. High-density bifacial modules can generate additional rear-side energy, increasing annual yield by 10–30% depending on installation configuration and ground albedo.
Every component plays a critical role. Understanding the energy flow helps you size and operate your system correctly.
Select the appliances you use, adjust quantities, and get real-time system sizing recommendations based on high-insolation conditions (4.5–5.5 kWh/m²/day).
| ✓ | Appliance / Device | Category | Power (W) | Daily Usage (h) | Daily (kWh/unit) | Qty | Total (kWh/day) |
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Each component is sized using industry-standard methodologies. Understanding the reasoning helps you make smarter trade-offs.
Required capacity is calculated as: Daily Load ÷ Peak Sun Hours × 1.25 (losses factor). We assume 5 PSH/day for high-insolation regions (4.5–5.5 kWh/m²/day). A 25% derating accounts for soiling, temperature, wiring, and inverter losses.
Sized for 2 days of autonomy at 80% depth of discharge (DoD) for LFP batteries: Daily Load × 2 ÷ 0.80. This ensures energy availability during cloudy periods without over-discharging, maximizing battery lifespan beyond 4,000 cycles.
MPPT controller current rating: PV Array Watts ÷ Battery Voltage × 1.25 (safety margin). For systems up to 5 kWp, 48V battery banks are standard. Controllers are available in 20A–100A+ ratings for both PWM and MPPT configurations.
Sized at 150% of peak simultaneous load to handle motor start-up surges (refrigerators, pumps, ACs). A hybrid inverter/charger combines DC-AC conversion, solar charging, and grid/generator backup in a single unit — the recommended approach for modern off-grid systems.
Indicative installed system costs by size, inclusive of panels, batteries, charge controller, inverter, mounting, cabling, and basic installation labor.
| System Size | Approx. Annual Yield | 💵 USD (Total) | 🇧🇷 BRL (Total) | 💶 EUR (Total) | Typical Use Case |
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Our engineers review your load profile and site conditions to provide a tailored, bankable system proposal — at no cost.