Short answer: don’t just connect and “see what happens.” You might damage the converter.

Let’s break it down simply 👇

Your compressor

• 12V, 70W
• Current needed = Power ÷ Voltage = 70 ÷ 12 ≈ 5.8A

👉 So your compressor needs ~6 amps (and maybe 8–10A peak when starting).

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Your AC → DC converter

You said:

• It’s 12V
• But you don’t know the watt or amp rating

⚠️ This is the risky part.

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What can go wrong?

If your converter is:

• Less than ~6A → it will:
  • Overheat 🔥
  • Shut down ❌
  • Or get damaged 💀

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What you should do FIRST (very important)

Look at the label on the converter. You’ll see something like:

• 12V 2A ❌ (too weak)
• 12V 5A ⚠️ borderline
• 12V 10A ✅ good

👉 If it doesn’t show amps, check watts:

• 12V 72W = 6A (minimum you need)

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Safe rule

• Minimum: 12V 6A
• Better: 12V 8–10A (recommended for motor startup)

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Can you test it anyway?

If you REALLY want to try:

• Do it for 1–2 seconds only
• Watch for:
  • Voltage drop
  • Noise
  • Heating

👉 If it struggles → stop immediately

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My honest advice

Motors (like compressors) are not forgiving.
Random testing = high chance of killing your power supply