Charging rate elec question

Be prepared for a few dozen answers - all different.

Long term charging opportunity, try FIVE percent of amp hour capacity

EXPENSIVE term (generator) charging opportunity, apply 14.8 volts, however many amperes that might be. In my case it is around 382 amperes at 28.8 volts. Cell to cell voltage maximum limitation.

Path1:
Which rig is this on?
I recently replaced my old converter with a Progressive Dynamics 9245. It made a world of difference from the original dumb converter. Charge rate is internally controled. It is doing a good job that I loose very little water.
Charge rate seems a little more then your battery guy says.
Try giving Best Converter a call 1-888 828-1893. Bestconverter.com
Have your existing converters make and model

full_mosey wrote:
Is anyone aware of any battery mfgr that does not at least recommend temp comp?

None that I'm aware of. Most all seem to either imply temp comp or recommend it.

Smart chargers with a temperature sensing cable attached to the battery bank should be in a position to provide an optimal charging solution.

By knowing the battery type and temperature, a smart charger can manipulate the Volts and Amps to keep the battery at the optimal charge rate. Optimal means a balance between battery life and fuel and time used to recharge.

Is anyone aware of any battery mfgr that does not at least recommend temp comp?

HTH;
John

Hi path1,

For very little more than the upgraded charger a solar system could be installed. Top of the line charge controllers are about the smartest devices around.

At 85% of fully charged 12.5 amps is about all that will go "into" a 100 amp-hour battery. A larger amperage converter will get from 50% to 85% faster, but will taper to 12.5 amps per 100 amp-hours.

A smart charger is mainly concerned with battery voltage. It won't overcharge it by going too high.
Your battery guy is also right. If you connect a 100 amp charger to a small group 24 battery it will initially try to push way too much current into the battery. Not for long, but it will.
For best long term battery health his "25% of amp hours" is pretty accurate with wet cell batteries, it doesn't apply so much with AGM batteries.
Many people who charge with a gen. want to limit it's run time and get huge chargers and put in much more than 25% of amp ratting. Overtime this does decrease battery lift but it also saves gen. gas and noise. So, it's probably the right approach.
If you're just charging off the grid and have lot's of time then try not to exceed 10% of AH capacity for longest battery life.

The smart charger will know more than the guy from the battery shop. Most battery manufacturers will list a charge rate that is the best for their product but the multi-stage charger isn't concerned with liability and returned product, it just does it's job.