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What is the difference between GP44XR 3k Watt Inverter and GP85QR 3,000W Inverter?  

Published 09/16/2025



Question:

What’s the main difference between the 3,000W single-leg GP44XR and the dual-leg GP85QR? They’re both 3k pure sine.

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Expert Reply:

Sherry, you’re right they both deliver 3,000 watts pure sine, but they’re meant for different rigs. The # GP44XR is a straight inverter - DC in, AC out - on one 30A leg, perfect for travel trailers or smaller Class Cs.

The # GP85QR is an inverter/charger/transfer switch combo with dual legs, so it can handle 3000w of 50A hookup for your coach and replace your converter/charger in one shot if you also need to charge your batteries.

Do you know if your RV is wired for 30A or 50A service? And do you already have a separate converter charger?

expert reply by:
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Andrew N

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