Solar battery maintainer? - Maserati Forum
 
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post #1 of 6 Old 03-08-2013, 11:01 PM Thread Starter
 
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Solar battery maintainer?

Finally must take action! My '02 CC Coupe sleeps in a public covered garage under a cloth cover. No electricity; and now in the winter especially the Optima Red 34R battery doesn't have enough oomph to start the car. So, out it comes to my home, charge with a 6V charger to bring it up to 12V and back she goes. (Wait the 30 seconds + in 'run' position) and the car starts For some good reason, the radio stations are still active.I thus enquire whether anyone has had success with such a maintainer with this car/battery combo? I park by a grille which allows light and occasionally direct sun in. I am tempted by The Deltran 5W unit on Amazon. Appreciate comments! Thanks
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post #2 of 6 Old 03-08-2013, 11:40 PM
 
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I'm not sure if 5W is enough, how often do you use the car?

When I parked my car over the winter in a garage without power I threw a 15W panel on the roof:
Sunforce 50032 15 Watt Solar Battery Charger : Amazon.com : Automotive

and used this controller connected to the battery:
Amazon.com: Kintrex SPC0601 7 Amp 100 Watt 12 Volt Solar Power Charge Controller With Digital LED Display: Patio, Lawn & Garden

I parked the car at the end of November and she fired right up in the spring.

2006 Coupe GT
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post #3 of 6 Old 03-09-2013, 12:32 AM
 
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The Deltran 5W is a float charger which is good, trickle charger is not good. I would try it and see.....

If you don't plan to drive your car over the winter you shouldn't start it periodically. Instead I would pull the battery and put it on a float charger.
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post #4 of 6 Old 03-09-2013, 02:54 AM Thread Starter
 
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Thank you thepat and JetNC. I'll look in these higher range wattages. I do like to use the car as often as I can, but it does not seem that I am bringing the battery really to full charge even though my tester shows 12V. Two days ago, I charged it, drove half an hour and then stopped for two hours. It barely started... even though my dash indicated the generator was working as I drove. So, a deeper charge sounds like the answer. I have heard that this Red Top does take a long time to top up.
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post #5 of 6 Old 03-09-2013, 11:27 AM
 
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If you are driving periodically then a float charger is good to use and it wouldn't hurt to use a fuel stabilizer like Techtron. I use it year round because I tend to travel and can be away for weeks sometimes.
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post #6 of 6 Old 04-09-2013, 06:02 PM Thread Starter
 
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Made the purchase

Well, I installed a Sunforce solar 15 w /7 amp solar charger with the Sunforce controller and left it attached for two weeks while away - indoors under a south facing bay window. The Redtop registered 12 volts. Now I have tried to get the readings up to 14 v with a 'full' charge of 13.2. Even in bright sun it never does this, but I can drive the car! (the controller specified above is no longer in production). So, I'll bring it home every so often and plug it in! Thanks. P.
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