Wadadli Solar Calculator v1 — Antigua & Barbuda

🔋 Your Off-Grid Setup

Monthly APUA bill (used to estimate your daily load)

EC$

Customer type

Days of battery backup (low-sun days to cover)

1 day2 days5 days

Battery model (EG4 wall-mount)

Number of battery units

unit(s)

— kWh bank

Units × price: —

🔆 Solar Array

Override system size (kW) — blank = auto-size from load

Peak sun hours/day (Antigua avg: 5.5 hrs — NASA/PVGIS)

Panel wattage (default 450W — Canadian Solar)

Analysis period

5 yrs25 yrs25 yrs

Annual APUA rate increase

1%4.0%/yr10%

Monthly loan payment (EC$ — 0 if cash)

🔆

—

Solar array

🔋

—

Battery bank

💵

—

Monthly Savings

📅

—

Payback Period

🏆

—

25-yr Savings

Wadadli Solar Price (EC$)

—

Equipment + freight to Antigua, excl. installation

🔧 Installation quoted separately

Equipment Cost (USD)

Solar panels—

Inverter—

Battery bank—

BOS / mounting / cabling (est. 15%)—

Equipment subtotal—

Shipping to Antigua (LCL Estimate)

Total shipment weight—

Total shipment volume—

Freight rate (US→Antigua via Miami)US$200/CBM + US$650 fees

Estimated freight—

Wadadli Solar Price

Equipment + freight (USD)—

Landed cost (EC$ at 2.70)—

Wadadli Solar Price (EC$)—

Load & Array

Est. daily consumption—

Est. annual production—

System efficiency (combined)—

Panels required—

Pallets required (30 × 450W)—

Battery

Bank — nameplate—

Bank — usable (at DoD)—

Autonomy covered—

Cash Flow

Loan payments (yr 1)—

Net cash flow (yr 1)—

25-yr cumulative savings—

Off-grid = zero APUA bills. Freight estimate is indicative — contact Wadadli Solar for an exact quote. Battery replacement (lithium yr 10–15) not included in savings projection.

All values are Antigua/Caribbean engineering averages. Actual system design requires a measured load audit and site survey.

Load estimate from bill

Daily kWh = (Bill − Fixed charge) ÷ EC$0.62 ÷ 30 × 0.85
Fixed: EC$25/mo residential · EC$60/mo commercial
Diversity factor: 0.85

Off-grid derating chain

Factor	Value	Basis
MPPT efficiency	97%	Industry standard
Inverter (EG4 6000XP)	94%	EG4 spec sheet
DC wiring losses	97%	3% at rated current
Temperature derating	94%	Antigua cell temp ~45°C, −0.4%/°C
Battery round-trip (LiFePO4)	92%	EG4 WallMount spec
Combined system efficiency	~76%

Shipping estimate (LCL, US→Antigua)

Item	Weight	CBM
Panel (450W Canadian Solar)	23 kg each	0.071 m³
EG4 WallMount Indoor 280Ah	149 kg	0.103 m³
EG4 WallMount Indoor 100Ah	~27 kg est.	0.044 m³
EG4 6000XP Inverter	~25 kg est.	0.125 m³
LCL freight rate	US$200/CBM + US$650 origin/destination

Pricing

EC$ conversion: EC$2.70 = US$1.00 (fixed peg)
Landed cost = Equipment USD + Freight USD, converted to EC$
Wadadli Solar price includes procurement, logistics & project management
Installation: separate quote

Equipment prices are subject to change. Freight is an estimate — actual quote required from a Caribbean freight forwarder. Antigua has zero customs duty on solar equipment. Installation not included.

Ready for a proper assessment?

This estimate gives you a business-ready starting point. Wadadli Solar handles procurement, logistics, and project management across Antigua and the Tri-State area.

Request a Full Assessment →