What Inverter Would Work as a Replacement to the WIN-12/300TL?

Updated 03/26/2026 | Published 11/27/2024

Question:

Hi I need to buy a WIN-12C300TL for my 2010 Winnebago Aspect 28B Do you carry this item?

asked by: Sherrie T

Expert Reply:

Hello Sherrie.

No, I am sorry but we do not carry that inverter. We do however have the Go Power Industrial Pure Sine Wave Inverter - GFCI - 400 Watt - 12V # 34282692 which would work just as great. This 400 watt inverter offers pure sine wave output so it is compatible with all electronics even those sensitive ones like tv's, laptops, smartphones, etc. I have included a review video so you can get a better feel for the product.

expert reply by: Kate F

Sherrie T.

11/27/2024

Will it fit in the cutout compartment of my RV?

Kate F.

11/27/2024

@SherrieT Yes, I see that the WIN-12/300TL is 13" X 6-1/4" X 3-1/4", and the Go Power # 34282692 is 7-7/16" x 5-15/16" x 2-11/16" so you will even have some room to spare.

Sherrie T.

11/27/2024

@KateF I ordered it and paid the extra shipping so it’ll arrive Friday but then my mechanic came back saying: I don't see the AC input/output connections on the this new one. Is there one and he just can’t see it? I told him you said it was compatible. The GFI plug is making a sizzling noise even when I press the reset

Sherrie T.

11/27/2024

@KateF He added: It should have a way to pass normal AC current thru when plugged into shore power and when in inverter mode also power that circuit. It looks like it only powers the GFI outlet on the front.

See All (7) Replies to Sherrie T. ∨

Jody

3/24/2026

Hello, was this situation ever resolved? I'm facing the same problem now; my old model DUI/WIN 12/300) is dead and I can't seem to find a replacement that has the same hardwire hookup to send the 110v back into the RV after taking the 12v from the battery.

Kate F.

3/26/2026

@Jody I’ve been digging into this and it doesn’t look like anyone ever made a true replacement. Those old WIN/DUI units had the built-in transfer switch and hardwire pass-through, and newer small inverters just aren’t set up that way anymore. The best option we have is to go with the Go Power Industrial Pure Sine Wave Inverter - GFCI - 400 Watt - 12V # 34282692, and pair it with the Go Power Automatic Transfer Switch # 342GPTS. That setup will recreate the same functionality your original unit had.

Helpful Links

tv-demo-go-power!-accessories-and-parts-342gpts.aspx