Quote:
Originally Posted by boywonder
Posplayr: Your C/10 charge rate assumes that you'd like to fully charge a fully depleted battery bank in 10 hours.......I'm assuming that's where C/10 is coming from...... ......
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Well you can assume what you want but that is not where C/10 comes from. It is a generally accepted charging rate that can be used for extended periods or safely charge almost any battery type overnight. In the specific case for LA batteries, it relates to the 14.5v alternator set points. Again you can run your vehicle down the road till you need to refill and at 14.5V you will not in any way damage the LA battery.
Quote:
Originally Posted by boywonder
Clearly there is no argument that your average 125A alternator is up to that task (although I have noticed that I get maybe a max of 40A or so getting to my house batteries even when they are down to say 70% SOC while driving).
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I was pointing out that an alternator can charge much higher than C/10 but as SOC approaches 100% that charge rate will tend toward C/10 due to the 14.5V set point.
Quote:
Originally Posted by boywonder
I believe that the OP was simply asking if a 1 amp trickle charger will keep his battery topped off sitting in his garage/driveway if he turns off his typical parasitic draw items like CO detector.....not sure he's expecting to top off a fully discharged battery in 10 hours......
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I think the question has been answered with about 3 data points. If you are using a 1 amp trickle charger running of 120V, then it will replace a 1 amp continuous load. Depending upon battery size and SOC OP can calculate how long any excess capacity that trickle charge will take to recharge a dead battery.
However, the question seems to be focused on "
Solar trickle Charging" . Now it takes in the best case 1*13.0*1.15*24/10= 36 watts with 10 sun hours.
(1 amp, 13V, 85% conversion/charge efficiency)
Derate that 10 solar hours to only 6 hours and you have 35*10/6= 60 watts required. If you don't get full sun, then double it again 120 Watts. That is a daily common suggestion in solar sizing.
Make any required adjustments, but you are going to need a fairly large panel to deal with a full amp of the draw. I'm ignoring the cut-off switch for the CO detector because I don't know how much of the 1 amp that is.
I have a Safety-Alert for propane and I think it is about 25 mAmp.
Bottom line, a 1 amp load is a fairly high drain (like having an incandescent dome light on continuously) even without having your battery discharged. I would try and address lower this and then a simple dashboard solar charger will work to handle the batteries "self-discharge rates"