Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: When unit is charging batteries can it run onboard appliances? Such as lights and bilge pumps
Document: I have had this installed on my 27ft sailboat for just shy of a year with no complaints. The lights, fans, and pumps in the cabin all run off the battery (as they should) and I picked the 20 amp to make sure that I don't run down the batteries at port. I don't think that this is intended to run a whole bunch of accessories and charge your batteries (the ProNautic series is) but It works fine for me.
It is the perfect charging system. It is perfect for my 3 battery system during winter storage & I could transfer it onto the boat in the spring! Well worth the peace of mind and money.
met my needs exactly. this unit provides power to my two 12 volt batteries to make 24 volts for my motor and also power for 12 volts for my accessory systems.
The first ProMariner 20 I had lasted about 18 months. It failed and fried two batteries. It was replaced under warranty with removal/reinstallation, shipping and battery replacement at my expense. The replacement unit only lasted about 12 months and just went dead. ProMariner's seem to be very poor chargers. I would not buy another.
In '08 I bought my first charger, a ProSport8 . Had it replaced under warranty immediatly and soon after that one failed too. This time they sent me a ProSport20 saying it was a more  dependable unit. Now it's summer of 2012 and the PS20 just burned up two batteries and super gassed my aluminum boat. There is no telling what kind of corosion problems that will cause ! I'll be looking for another brand.
This was a no surprise purchase that came exactly as advertised. I does what it is suppose to do and has kept the batteries topped off while running the on-board DC refrigeration. As the freezer draws up to 20 Amps this unit is working like a charm. I would recommend it to anyone with 2 to 3 battery banks where all batteries are of the same kind. This is not recommended for use of different types of batteries so be aware.
Bought this after my old charger lost one of its three circuits. It's on my fishing boat and charges the trolling, starting and accessory batteries (mix of flooded cell and glass matte). The first unit that arrived from the seller was DOA. But they replaced it quickly at no cost; just the aggravation to me. The second unit worked fine and seems to do a good job keeping all the batteries topped off, and I keep it plugged in all the time I'm not using the boat.
I don't write reviews but I thought you may want to know that my Prosport 20 killed 2 of my batteries from a sudden over charge thats not terminating. The unit was about 2 years old. I'm giving it 2 stars because after calling ProMariner they are sending me a new Gen 3 model at a cost of 159$ shipped. Im still out the cost of 2 new deep cycle trolling batteries at a cost of 220$.
The unit performs outstandingly in a boat engine room. I am totally pleased. Very easy to setup and it works.
I could go on but you think I was a salesman for the company. Took me longer to type this than install the unit
Answer: yes