Convert Dc to Ac Calculator

DC to AC Inverter Calculator

110V (US/Standard) 120V 220V (International) 230V 240V

Results:

DC Input Power: 0 Watts

Estimated AC Output Power: 0 Watts

Estimated AC Output Current: 0 Amps

*Losses due to heat and conversion: 0 Watts

function calculateDCToAC() { var dcV = parseFloat(document.getElementById("dcVoltage").value); var dcA = parseFloat(document.getElementById("dcCurrent").value); var acV = parseFloat(document.getElementById("acVoltage").value); var eff = parseFloat(document.getElementById("efficiency").value); if (isNaN(dcV) || isNaN(dcA) || isNaN(acV) || isNaN(eff) || dcV <= 0 || dcA <= 0) { alert("Please enter valid positive numbers for all fields."); return; } // DC Power = V * I var dcPower = dcV * dcA; // AC Power = DC Power * Efficiency var acPower = dcPower * (eff / 100); // AC Amps = AC Power / AC Voltage var acAmps = acPower / acV; // Power Loss var powerLoss = dcPower – acPower; document.getElementById("resDcPower").innerText = dcPower.toFixed(2); document.getElementById("resAcPower").innerText = acPower.toFixed(2); document.getElementById("resAcCurrent").innerText = acAmps.toFixed(4); document.getElementById("resLosses").innerText = powerLoss.toFixed(2); document.getElementById("resultsArea").style.display = "block"; }

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Understanding DC to AC Conversion

In renewable energy systems, battery storage, and automotive applications, converting Direct Current (DC) to Alternating Current (AC) is a fundamental necessity. This process is handled by a device called a power inverter.

How the Calculation Works

Converting power from a battery (DC) to run household appliances (AC) involves three main factors:

• Input Power: Calculated by multiplying your battery voltage (usually 12V, 24V, or 48V) by the current drawn from the battery.
• Efficiency: No conversion is 100% efficient. Modern inverters typically operate between 85% and 95% efficiency. The "missing" power is usually dissipated as heat.
• Output Voltage: Depending on your region, you will likely be converting to 110V-120V (North America) or 220V-240V (Europe and Asia).

The DC to AC Formula

To calculate the available AC output, we use the following sequence of formulas:

1. DC Watts: DC Volts × DC Amps
2. AC Watts: DC Watts × (Efficiency / 100)
3. AC Amps: AC Watts / AC Volts

Real-World Example

Suppose you have a 12V battery system and you are drawing 100 Amps of current. You are using an inverter with 90% efficiency to power a 120V AC device.

• DC Power: 12V × 100A = 1,200 Watts
• AC Power: 1,200W × 0.90 = 1,080 Watts
• AC Current: 1,080W / 120V = 9.0 Amps

In this scenario, while you are pulling 100 Amps from your battery, you only receive 9 Amps of AC current at the higher voltage. Additionally, 120 Watts of energy is lost as heat inside the inverter.

Why Efficiency Matters

When sizing your battery bank or choosing an inverter, always account for efficiency. If your AC appliance requires 1000 Watts, you cannot simply provide 1000 Watts of DC power. Due to the 10-15% loss common in most inverters, your DC source must be able to provide roughly 1150 Watts to ensure the appliance operates correctly.