Question 1

Does this unit have a cooling fan? Does it overheat?

Accepted Answer

No fan. Yes it over heats. Mine died after a month and MFG service and support link, nor the registration lik work on their website. Unable to get through via phone. Had to buy a new one. I went with Charles Marine charger. Superb charger. Beware of this one.

Question 2

I have a single starting battery (one bank) .Then I have two deep cycle batteries in parrallel (bank 2). Do I need a 2 or 3 bank charger?

Accepted Answer

you failed to give the the voltage, type, and size of batteries, and what they are being used for, but going with the information you submited. providing all of the batteries are 12v d.c. you require a 2 bank charger, but if i were you, i would order the 3 bank charger for future battery expansion, i would connect one of the charger outputs across the neg & positive terminal of the stand alone 12v dc battery, and i would then connect the second charger output lead across the 12 v dc neg & positive terminal of one of the 2 batteries which are tied in parallel.  the charger in question permits the 3rd charger output to be connected to the 3rd neg & positive post of the 3 rd 12 v dc battery which is tied in parallel. but if i were you, i would first contact the manufacture reps, before you do anything, tell them your set up, and see what they think. in any event good luck, and above all do not forget to ware the proper safty equiptment prior to doing any work on any batteries.

Question 3

I am installing this into my sailboat.  What is the 110v amperage draw?

Accepted Answer

The power consumed by any electric unit is equal to the Operating voltage V times the current  I. or Power = V*I in watts. If this charger is charging 2 batteries at 12 volts each and drawing 10 amps for each battery the power used is 12 * 10 = 120 watts each. So the ideal power used would be 240 watts for the two batteries.  The AC source must supply power in the same way so you need 110 volts times I amps = 240 watts.  Therefore the current, I, drawn would be 240/110 or around 2.2 amps , but you never have ideal energy exchanges because of heat loss and other things.  So I would think you would need to have a source that could provide at least 5 amps @ 110 volts or around 600 watts at maximum usage. Much less current is needed for  trickle charging.This gives you a margin of error of over 200% so should be OK. Hope this helps

Question 4

2 engine start and one thee battery house set ...so i need a 5 bank charger?

Accepted Answer

Your description is not 100%, but it sounds like you need three Banks. One for each starting battery, and one for your group of house batteries, assuming they are all tied together.

ASIN	B00F5EBTGA
Amperage	20 A
Battery Charge Time	10 hours
Best Sellers Rank	#1,229,446 in Automotive ( See Top 100 in Automotive ) #2,157 in Battery Chargers
Brand	ProMariner
Built-In Media	battery charger
Color	Yellow/Black
Compatible Devices	Boat
Connector Type Used on Cable	DC
Current Rating	20 A
Customer Reviews	4.6 4.6 out of 5 stars (1,325)
Global Trade Identification Number	00031669430211
Input Voltage	36 volts
Item Dimensions D x W x H	6"D x 14.5"W x 8.5"H
Item Type Name	Waterproof Battery Charger
Item Weight	8 pounds
Manufacturer	ProMariner
Mfr Part Number	43021
Model Number	43021
Number of Items	1
Number of Ports	3
Output Voltage	36 volts
UPC	656727420579 690579678177 031669430211
Unit Count	1 Count
Warranty Description	24 Months

ProMariner Gen 3 ProSport 20 Amp 12/24/36 Volt 3 Bank Waterproof Marine Battery Charger 43021

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