another source for agm batteries
Hi, It's time for me to consider replacing four of my batteries that are now 8 years old. I came across this on Amazon. Any one have an opinion on this company? http://www.vmaxchargetank.com/...
Forum Discussion
Lifeline provides a formula to estimate charge times:
A temp comp charger actually simplifies this by adjusting charge stages according to a reference 77F. The charging profile is then based on 77F and you ignore battery temps because that is handled already.
The Tristar models of solar controllers are known for their ability to accept custom parameters that meet whatever your battery manual requires. They can sense both battery volts and temperatures.
Converter/chargers are dumb by comparison.
HTH;
John
5.4 wrote:
The time to reach full charge at temperatures in the range of 68 to 86°F (20-30°C) can be estimated from the following equation:
Time to Reach Full Charge = ((DOD/100) x Rated Capacity (Ah) ÷ Rated Output of Charger (Amp)) + 2 hours.
For example, charging a 100Ah battery at 50% DOD with a 25A charger would take:
((50/100) x 100 ÷ 25) + 2 = 4 hours to reach full charge.
If a 10A charger is used, it would take:
((50/100) x 100 ÷ 10) + 2 = 7 hours to reach full charge.
A temp comp charger actually simplifies this by adjusting charge stages according to a reference 77F. The charging profile is then based on 77F and you ignore battery temps because that is handled already.
The Tristar models of solar controllers are known for their ability to accept custom parameters that meet whatever your battery manual requires. They can sense both battery volts and temperatures.
Converter/chargers are dumb by comparison.
HTH;
John
