What can a 600 watt inverter run?

Any combination of loads whose running watts total under 600. A laptop (60 W), a 32-inch TV (50 W), a CPAP without its heated humidifier (about 40 W), and phone charging all fit at the same time. The 1200 W surge rating covers the brief starting draw of small pumps and compressor coolers.

Why does pure sine wave matter in a small inverter?

Modified sine inverters approximate AC with square voltage steps. On that power, chargers buzz, motors run hot, and some medical devices refuse to start. The NTX-600-12 produces a true sine wave, so anything rated for a wall outlet behaves exactly as it does at home.

Will the NTX-600-12 drain my battery when nothing is plugged in?

Slowly, yes. It draws under 0.9 A at no load, roughly 20 Ah over a full day, so switch it off when you are done. If the battery runs low anyway, an alarm sounds at 11.0 V and the inverter shuts down at 10.5 V to protect the battery from deep discharge.

What is in the box, and how does it connect?

The inverter, a DC input cable fitted with the rectangular lug its thumb-screw M4 terminals require, and a set of battery clamps. Clamp on for portable use, or ask us about cable gauge and fusing before you hardwire it for a fixed installation.