This WF-9800 series converter works much the same as any of them. It charges your battery and provides high current DC for your RV or DC system. This converter is a little bigger than the 55A series converter that most mid size RVs have. If you want to upgrade your RV converter to this bigger size, check the dimensions first. You also have to verify that your power panel will handle 70-75 amps. If not, your breaker will not allow you to use the extra current. The item description AND manual says that this unit comes with a 20A cord, well, it doesn't. It has a standard 15A AC cord. Since the converter will draw about 15A at full output, you may trip your AC breaker. It will fit into a 20A outlet and a 15A outlet, so use caution. Easy to install as long as it will fit into your compartment and you have the right size wire and breaker in the RV. The fan runs as needed and is reasonable in volume. The pricing is about half the name brand, so it is economical. One nice thing is that it comes with a hex wrench sized to fit the DC terminals. The manual directions need to be updated. It is specifying 8 gauge wire for DC hookup. This is a little undersize for 75A max output. You should be using 4 gauge. Stick to NEC guidelines if it conflicts with the manual. This converter also makes a good DC supply and charger for off grid battery banks. Converter works as it should, but be careful of the cord and the manual. They both need to be changed. Rating reflects these minor flaws.

I checked the output of this, and the voltage output seems to be correct and steady. The build quality is quite good, and the functionality seems quite good as well. So, I really don't have any complaints on the unit itself, per se.My only problem is with the instructions where it stipulates, and I quote, "An 8AWG copper conductor shall be used to bond the WF-9800-AD Series Converter-Charger to the vehicle frame." And, "Connect a red 8 AWG wire to the POS+ lug on the distribution center's fuse board. Make sure this lug is torqued properly. In a similar fashion, connect a black 8 AWG wire to the NEG- lug on the distribution center's fuse board."As someone that knows a bit about electricity, that wire gauge seemed small to me, so I hit Google to verify, and Google verified my suspicions. Google, which takes its recommendation from the actual electrical code, states plainly, "For a 75 amp DC application, you'll need a wire with a minimum ampacity of 75 amps, which translates to a 4 AWG copper wire or a 3 AWG aluminum wire." My sentiments exactly. If you follow the included instructions, you'll likely be using a wire too small for the current load, and I shouldn't need to tell you that can cause problems. Bad ones.So, while I like this power supply and it seems to work well, definitely look elsewhere when it comes to wire size recommendations, as the instructions here will lead you astray.

I have a 2017 RV trailer currently using two 12V AGM batteries which are getting old. These batteries had come out of another trailer we used to own and are now over 12 years old. They are still working but don't seem to hold the charge capacity they used to. I am now considering upgrading the old batteries to Lithium batteries but need a newer converter/charger with "auto-detect" capability for battery types. This would allow me to still use/charge my lead acid or AGM batteries for the time being, providing the option (and the properly charging capability) for the Lithium type batteries when I upgrade. The current converter/charger can still charge Lithium batteries but not to their full capacity. Lacking a converter/charger capable of fully charging Lithium batteries would be counter-productive towards the purpose (and expense) of transitioning to Lithium batteries. I saw this converter/charger and saw that it had Auto-Detect capability to determine battery type. The charger provides Three-Stage Smart Charging capacity for lead acid and AGM batteries as well as Two-Stage Smart Charging capacity for Lithium batteries. Although this converter/charger is a bit overkill for my needs (being 75 amp DC capacity vs my RV's current 55 amp DC capacity), I am hoping it might fit in the RV's compartment. If not, I intend on using it as a 12V battery charger or powering station at my house for several 12V devices I have.The device seems well constructed and appears of equal quality to other 12V converter/chargers I have used. I powered the device up for a couple weeks and it seems to be working just fine. It didn't quit working or burst into flames or anything ;-) . But I did test the voltage output with my multi-meter (without any battery attached or loads) and initially got 13.57V DC output. Later, after the converter/charger sat for several days, I tested again and got 13.08V DC voltage output for the duration of the test period. It appears that when the converter/charger has no load or battery attached it switches to the "float" mode (trickle charge) when it detects no significant current draw over a period of time. Since I had nothing drawing current (except my low draw multi-meter) it appears I confirmed that the converter/charger in fact switches to "float"/trickle mode when no significant current draw is detected. The "float"/trickle mode is described in the operator manual to be 13.2V DC so the voltages seem fairly close. This was the extent of my testing capabilities but I think the converter/charger is working fine.The Operator's Manual seems well written with understandable instructions and good graphics. The kit even came with a nice allen wrench tool for tightening the wires down to the converter/charger lugs. The pricepoint seems about in line with other RV converters/chargers I have seen advertised. Overall, I am happy so far. When I get some free time I will see if it can fit into my RV.

This converter charger arrived intact and well protected using custom fit foam packaging, topped with large cell bubble wrap. The converter was in new condition inside its branded box. The instructions are well worded and offer sufficient information for use. The unit itself is well built and sturdy, with its metal exterior. The unit functions well and is easy to install. Overall, I am happy with it.

I needed a new one, so I tried this one.It works great and once connected, it provided enough power to charge my batteries surprisingly fast.Great product and would order again.Shipped and arrived quickly.