The Replacement 12V DC Battery Charger for etrailer Portable Inverter Generator # 333-330713634 does appear to be the same charger as the one in your picture that came with your RP12000E CAT portable generator.
It has the same model number, part number, input and output specs. We do not carry the Cat/Caterpillar generators, so I cannot "confirm". But as far as I can tell, this is the same charger you currently have. view full answer...
I'm sorry to hear your digital charger controller went out on your Go Power Portable Solar System with Digital Solar Controller # 34282610.
The correct replacement controller is the Go Power PWM Solar Charge Controller # 34276119.
The Go Power Portable Solar System # 34282610 has a 5 Year Warranty on the controller so before you purchase a replacement controller I recommend contacting the retailer you purchased the kit from to see if it is still under warranty.
I included videos for... view full answer...
I went ahead and checked out your Firman WO3383IR and it turns out unfortunately the receptacle you're referencing is not replaceable.
That said, the only replacement we carry that you're needing as well is the Replacement 12V DC Battery Charger for etrailer Portable Inverter Generator # 333-330713634. view full answer...