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

Last year Our nitro bass boat was left outside and the 3 bank water proof charger we had on it was submerged in ice water; we had been looking for a new one but every one was 500 plus and there was no way I was allowing that; I jumped on amazon before Father’s Day and found this three bank charger; we didn’t need to purchase any of the extra accessories bc we already had one on our boat before, much to our surprise it fit perfectly in the original holes from our first bank charger and this one during a heavy rainstorm ended up submerged for a few days bc the plug was left it, once again big shock after draining the boat and allowing it to dry we plugged it right in and it still works! No problems what so ever, love this bank charger! It runs two trolling batteries and the master, we can go out for hours and not worry one bit about battery charge! Love it! And under 200.00!

I"ve had this charger for a few years and it's been working well and makes charging the 3 batteries on my boat an easy operation. Never had an on board charger before, and always charged the batteries 1 at a time which was a huge pain. When I plug this charger in it checks all the batteries and if the connections are good begins to charge them. So it's kinda like a little check on the electrical system as well as charging batteries, and you don't waste your time trying to charge if the connections to the batteries or a fuse are bad. Very handy after a day on the water to simply plug in the charger and go to bed knowing all 3 batteries will be full charge in the morning. Installation was pretty easy, the wires were just long enough to reach the one battery on the opposite side of the boat from where I mounted the charger. My boat is an 18' center console. 3 full seasons later this charger looks and works like new

I should of saved my money and bought this years ago. Easy install and the cable extensions they sell are excellent. Now after a long day on the lake just have one power plug to deal with to charge my two trolling motor batteries and the outboard starting battery.Bought mine new June 2018. Has work flawlessly until recently I had an intermittent issue where the only the Blue light would come on and the charger would not work. Talked to tech support who told me the little plastic plug that sets the battery type had been causing problems in some of the chargers. The issue is that it can be too long and interferes with the sensors. He had me trim about half of it's length off. It now works great again. Also be aware it can loosen up in use so be sure to put a dab of adhesive on it when you screw it in. If not it will cause problems.Tech support was very helpful and was easy to get a hold of. I appreciated how patient and friendly they were.Bill

The prosport 20 works well. This is my second one for my other boat.They are very dependable and seem to treat the batteries well, thus extending their life. I have one that’s about 5 years old and no issues with the charger or batteries and I don’t expect any from this.Deducted one star because they darn extension cables for the charge leads are absurdly priced. Also wish it were a bit smaller, hard to fit this size charger on a smaller boat.

I used this to charge the batteries on my boat. It worked great for almost a year then it quit charging. I called up customer support and they gave me an easy step by step process to follow to fix the problem. Apparently the program screw just needed shaved down a little and it works again. I am a business owner and I always say you can judge a company by the way they go about fixing problems (because every company has problems) and this company had a real person (who I could understand) answer the phone and give me the solution. That is worth its weight in gold. I have two of these chargers and would buy another one.

My initial impressions of this charger are very favorable. It installed easily enough, although it is larger than the unit it replaced so finding/making room for it was harder than I expected. Once plugged in, it goes into an evaluation mode where it prioritizes which batteries to charge first based on rate of discharge. It has very clear indicator lights to show you what it is doing, and the status of the batteries. The biggest test with this charger will be how long it lasts, as I did quite a bit of comparison shopping and notice that most of the other brands are considered a 2 year lifespan. The ProMariner had good reviews so I am hoping it will make it more than 2 years. I think it is critical to mount it according to the instructions, with room for ventilation and in an area that should not be exposed to water. I mounted it accordingly, and time will tell.Update: 10/20/15 For the last 2 months I've been having difficulty with my starting battery. It is dropping too low on voltage to start the motor. I tested the voltage and it is dropping to 10.5 volts, with no draw on the battery (main kill switch). It seems to be switching to the charge cycle only when it drops below 10.5 volts. I have contacted ProMariner to initiate a warranty repair/replacement. I hadn't hoped to test the warranty so soon. If only someone made a reliable charger.