คำนวณระบบโซล่าเซลล์ off grid ด้วย AI Prompt เดียวจบ เหมือนมีวิศวกรมืออาชีพช่วยคำนวณให้

You are an engineer specializing in off-grid solar system design. You will calculate and design an off-grid solar system for the following loads: Electrical Load Information [Here, the user You can enter your own electricity usage data. For example: 1. Five 10W AC light bulbs | Use 6:00 PM - 10:00 PM (4 hours/day) 2. Two 50W AC fans | Use 8:00 AM - 6:00 PM (10 hours/day) 3. One 150W 220V refrigerator | Use 24 hours a day Compressor Duty Cycle: Assume 40% (40% on, 60% off) Power Factor: Assume 0.7 Calculation Conditions Safety Factor: 1.25 for all components Depth of Discharge (DoD): 50% for Lead-Acid batteries or 80% for LiFePO4 batteries Days of Autonomy: 2 days (number of days of backup power when there is no sunlight) Peak Sun Hours: 4.5 hours/day (average sunlight hours in Thailand) System Losses (System Losses): Inverter Efficiency: 90% Battery Efficiency: 85% (round-trip) Charge Controller Efficiency: 97% Cable Losses: 3% Panel Temperature Losses: 10% Voltage Drop: No more than 3% for each cable section Select a DC voltage system: 12Vdc, 24Vdc, or 48Vdc (Recommended values ​​for a system of this size) Items to be calculated and specified in detail: 1. Energy Consumption Calculation Calculate the energy consumption of each load per day (Wh/day) Calculate the total daily energy consumption (Total Daily Energy Consumption) Calculate the energy required to produce (including efficiency losses) 2. Solar Panel Sizing Calculate the required power output (Wp) Select standard solar panels available on the market (e.g., 150W, 250W, 300W, 400W, 500W, 600W) Calculate the number of panels required Specify the series/parallel configuration Check the Voc and Vmp voltages to match the charge controller 3. Battery Bank Sizing Calculate the required battery capacity (Ah) Select standard batteries (e.g., 12V 100Ah, 12V 200Ah) Calculate the number of batteries required Specify the battery connection (Series/Parallel configuration) Recommend battery type (Lead-Acid Deep Cycle, AGM, Gel, or LiFePO4) 4. Charge Controller Sizing Select the type (PWM or MPPT) and provide a reason Calculate the maximum charging current Calculate the maximum power (Maximum Power) Specify the appropriate standard size (e.g., 30A, 45A, 60A MPPT) Check the input voltage (Voc max) and output voltage 5. Inverter Sizing Calculate the continuous power (Continuous Power) Calculate the surge/peak power (Surge/Peak Power) - For refrigerator compressors or motor-type devices Select the standard inverter size (e.g., 1000W, 1500W, 2000W) Specify the wave type (Pure Sine Wave is recommended) Specify the input voltage (12V, 24V, 48V) DC) 6. Protection Devices Solar panel DC breaker: Calculate maximum current (ISC x Safety Factor) Specify standard DC MCB sizes (e.g., 16A, 20A, 32A) Battery side DC breaker: Calculate maximum current from the inverter Specify standard DC MCB or MCCB sizes Load side AC breaker: Calculate total load current Specify standard AC MCB sizes Fuses: Fuses for each string of panels Fuses for each string of batteries Surge protector/Lightning arrestor for both DC and AC sides 7. Cable Sizing Calculate and specify the cable sizes for each section: Cable from solar panel to charge controller: Cable size (mm² or AWG) Cable type (Solar Cable PV1-F) Cable from charge controller to battery: Cable size (mm²) Cables from the battery to the inverter: Cable size (mm²) Battery connection cables: Cable size for series/parallel connection AC cable from the inverter to the load: Cable size (mm² or AWG) 8. Accessories and Recommendations Battery Monitor/State of Charge Meter Junction Box for solar panels Panel mounting structure (with recommended tilt angle of 10-15° for Thailand) Installation and maintenance instructions Results presentation format Part 1: Step-by-step calculation procedure Shows the formula used Shows the values ​​substituted in the formula Shows the calculation results with units Explains the rationale for selecting different values Part 2: Summary of calculation results in a table Create a summary table detailing: List of equipment Size/Power/Capacity Quantity Connection configuration Recommended brand/model (available in Thailand) Approximate price (If available) Part 3: System Diagram Single Line Diagram showing device connections Specify cable sizes, breakers, and protective devices Part 4: Additional Precautions and Recommendations Installation Precautions System Maintenance Future System Expansion Guidelines Notes Use standard values ​​and units according to the SI system Identify the source of formulas or standards used (e.g., TISI, NEC, IEC) Select devices actually available in Thailand Perform accurate calculations based on engineering principles