☀️ CircuitSecrets

Solar PV System Designer

Complete solar system design tool — load sizing, panel configuration, battery bank, charge controller, cable sizing, ROI analysis & saved history

Load Sizing

Panel Config

Battery Bank

MPPT/PWM

Cable Sizing

ROI Analysis

⚡ Daily Load 0 Wh

☀ Array 0 Wp

🔋 Battery 0 Ah

⏬ Controller 0 A

🌞 CO₂ Saved 0 kg/yr

Step 1

Load & PV Power Sizing

Appliance Load Builder

Appliance

Wattage W

Qty × Hours/day

Appliance	W	Qty	Hrs	Wh/day
Add appliances above to build load profile

Total: 0 Wh/day

OR Direct Energy Input

Daily Energy

WhkWh

Peak Sun Hours PSH

System Loss %

System Voltage V 12 V 24 V 48 V

Required Array Power

—

Wp (peak watts)

Step 2

PV Array Configuration

Array Requirements

Required Array Wp

System Voltage V 12 V 24 V 48 V

Panel Specification

Panel Size W 100 W (12V Vmp~18V) 160 W (12V Vmp~18V) 250 W (24V Vmp~30V) 330 W (24V Vmp~34V) 450 W (48V Vmp~45V) 550 W (48V Vmp~50V) Custom...

Custom Wattage W

Panel Vmp V

Panel Voc V

Total Array Power

—

Wp installed

Step 3

Battery Bank Sizing

Energy Requirements

Daily Load Wh

Days Autonomy

System Voltage V 12 V 24 V 48 V

Battery Voltage V 2 V (cell) 6 V 12 V 24 V

Battery Type & Settings

Battery Type Lead Acid / Gel (50% DoD) Tubular Deep Cycle (60% DoD) LiFePO4 Lithium (80% DoD) Li-Ion (90% DoD)

Inverter Efficiency %

Battery Capacity Ah Custom (auto) 50 Ah 100 Ah 150 Ah 200 Ah 250 Ah

Battery Cost ৳/unit

Required Bank Capacity

—

Ah at system voltage

Step 4

Charge Controller Sizing

Array & System

Total Array Wp

Battery Voltage V 12 V 24 V 48 V

Array Voc V

Safety Margin %

Controller Rating

—

Amperes (MPPT recommended)

Step 5

Cable Sizing & Voltage Drop

Circuit Details

Current A

Cable Length m one-way

System Voltage V 12 V DC 24 V DC 48 V DC 230 V AC

Installation Open Air (×1.0) In Conduit (×0.87) Underground (×0.75) Motor/High Surge (×0.7)

Max VD % 3% (solar PV) 5% (general) 2% (critical)

Cable Material Copper (ρ=0.0172) Aluminium (ρ=0.0282)

Recommended Cable Size

—

mm² (minimum)

Bonus

ROI & CO₂ Analysis

System Cost ৳

Electricity Rate ৳/kWh

Daily Load Wh

Panel Lifespan yr

Records

Saved Calculations

Time	Type	Details
No saved calculations yet.

⚠ Note: Calculations are estimates based on standard solar engineering formulas. Actual performance varies with location, shading, temperature and equipment. Consult a qualified solar installer for final system design and installation.

© 2024 CircuitSecrets — Solar PV System Designer · Load Sizing · Panel Config · Battery Bank · MPPT Controller