for the best charge on a 12 volt deep cycle marine battery? 2 or 10 amps?

Question

i have boat that is very hard to start and i need a fully charged battery to do this. i am not sure i am charging my battery correctly.

Answer 1

A low amperage charge (2-4 amp) is best for 8 to 12 hrs depending on current state of battery. More importantly is a charger that is rated for deep cycle/RV batteries. It will say on the ratings sticker or the instruction manual of your charger. If the boat requires a full chg to start, you may want to replace your battery with one that has more available cranking amps.
Happy Boating!

Answer 2

2

Answer 3

Well, with 8- 85 watt solar panels, charging 12 6 volt deep cycle batteries, it usually takes about 4 hours to get up to the 14 volt range. Now, charging directly off a solar panel into a batter is a very un safe thing to do, as you will not know when the charging rate needs to be slowed down to top of the batter, and can very easily overcharge the battery which will render it useless or even blow it up. You need a small device in your link called a charge controller. For what you wish to do , you can buy a decent little one for about 40.00 or so. I say this to you as a very experienced person living off the grid entirely for about 16 years now. People can tell you anything , especially when trying to sell you things, but I know because I live from it daily. Click on the link below which I have put a page on one of my websites just for the solar with a very simple diagram of how solar actually works. I will most likely give you a little better idea with out all the tech. stuff to view solar

Answer 4

The rate of charge in the re-charging of a deep cycle battery is not as important as the length of time the battery is charged. As a rule, a longer charge at a lower amperage rate is ideal for fully charging a deep cycle battery. Remember, the deep cycle battery is designed for slow, continuous discharge at low to moderate amperage loads. It likes to be recharged in a similar fashion. If you're having trouble starting the engine look for the usual culprits; defective battery, loose, dirty or corroded battery cables and connections, defective starter motor or (gulp) and internal engine issue.
Good luck!

Answer 5

It is always better to charge at a slower rate for a longer time. It keeps from boiling the acid in the batteries. But the problem might be with your battery itself. A deep cycle battery is besigned to be be slowly discharged for a long period of time and the recharged. You motor requires a large amount of amperage at one time to turn over. The marine starting battery is designed to do just that. It delivers a large amount of amperage all at once to be able to turn over the motor . Hence the name. I know this because I have got 13 years experience working at one of the major Boat companies.

Answer 6

Buy an automatic charger, and then let it run until it shuts itself off. It may start charging at a higher amerage, but then lower it as the battery starts to retain charge. Make sure that all the terminals are clean, and there are no closed circuits on the boat.

Answer 7

Actually the best charge come from a multi stage charger. Deep Cycle batteries can build up a plaque that eventually kills the battery. Multi stage chargers have circuitry that fights this build up and can even reverse it. I wouldn't go with any charger that wasn't up to date with today's technology..

Answer 8

This blog post has some useful information on deep cycle battery charging time http://www.aussiebatteries.com.au/blog/charging-deep-cycle-batteries/

Answer 9

slow charge- 1or 2 amps for 12-18 hrs.

Answer 10

10 amps