// Solar Load Calculator · Nigeria

KNOW YOUR
POWER
DEMAND

Calculates Consumer Energy Demand (CED), battery bank sizing, panel array, inverter sizing, and cable sizes for Nigerian solar installations.

// Formulas Used in This Calculator
CED = (Output Energy / 0.9) + Inverter Standby Consumption
Inverter Standby = Total Power × Oversize Factor × 24 × 0.02
Battery Capacity (Ah) = (CED × DoA) ÷ (System Voltage × DoD)
Panel Energy = CED ÷ Performance Ratio (PR = 0.65)
Panel Power = Panel Energy ÷ PSH
No. of Panels = Panel Power ÷ Panel Watt Rating

YOUR APPLIANCES

Select appliances. Adjust quantity, daily hours, and actual wattage per unit.

─── Add Custom Appliance
// Live Load Summary
Items selected0
Running load0 W
Peak surge0 W
Output energy0.0 kWh
Inv. standby0.0 kWh
CED (Consumer Energy Demand)
0.0
kWh/day
CED = (Output ÷ 0.9)
+ Standby Consumption

LOAD ANALYSIS

Detailed breakdown of your electrical demand.

// Output Energy (kWh)
0.0
kWh/day
Σ (W × qty × hrs) ÷ 1000
// Inverter Standby (kWh)
0.0
kWh/day
P_total × OSF × 24 × 0.02 ÷ 1000
// CED (kWh/day)
0.0
Consumer Energy Demand
(Output ÷ 0.9) + Standby
// Peak Surge Load
0
Watts (startup peak)
Σ (Surge W × qty)
// CED Calculation Breakdown
Inverter Input Energy = — kWh  (Output Energy ÷ 0.9 inverter efficiency)
Inverter Standby Consumption = — kWh  (Total Power × 1.2× × 24h × 0.02)
CED = — + — = — kWh/day
Category Breakdown
Appliance Detail
ApplianceQtyRated WActual WHrs/DaykWh/Day
⚡

// Solar System Sizing Report

SYSTEM READY

—

Inverter Size (VA)
—
Min. recommended
Peak Surge × 1.25
Main Circuit Breaker
—
Amps (A)
I = P ÷ V × 1.25 safety
MPPT Controller
—
Minimum current (A)
I_parallel × Isc × 1.25
01 — Inverter Type Selection
🔋
Pure Sine Wave
For all appliances incl. AC motors, pumps, sensitive electronics.
⚡
Modified Sine Wave
Budget option. Resistive loads only (bulbs, fans). Not for AC, fridge.
☀️
Hybrid Inverter
Solar + battery + grid in one unit. Built-in MPPT. Best for NG homes.
Select inverter type above.
// CED Used for Battery & Panel Sizing
CED Formula
CED = (Output Energy ÷ 0.9) + (Total Power × OSF × 24 × 0.02)
CED = — kWh/day
DoA = 1 day | All battery and panel calculations below use this CED value.
02 — Battery Bank Sizing
Battery Capacity Formula
Battery Capacity (Ah) = (CED × DoA) ÷ (System Voltage × DoD)
DoA = Days of Autonomy (usually 1) | DoD = Depth of Discharge
20%95%
Recommended DoD
50% — Lead-Acid
Ah Required
—
(CED×DoA)÷(V×DoD)
No. of Batteries
—
units required
Usable Capacity
—
kWh usable
Backup Duration
—
hours estimated
Connection: — —
—
03 — Solar Panel Array Sizing
Panel Sizing Formula
Panel Energy (kWh) = CED ÷ PR    [PR = Performance Ratio, default 0.65]
Panel Power (kW) = Panel Energy ÷ PSH    [PSH = Peak Sun Hours]
No. of Panels = Panel Power (W) ÷ Panel Watt Rating
Panel Energy
—
kWh (CED ÷ PR)
Panel Power Needed
—
W (Panel Energy ÷ PSH)
No. of Panels
—
@ — W each
Array Connection
—
—
—
04 — Cable Sizing (IEC 60228 / NEC Copper)
Circuit Current (A) CSA (mm²) Diameter (Ø mm) Standard / Note
05 — Nigeria-Specific Installation Tips