Actually, Trojan has more specific criteria for equalization based on SG. I have 8X T-1275 for 48V.
The key to achieving optimum performance and long battery life is to follow a regular care and maintenance program. Read our tips for high performance battery maintenance.
www.trojanbattery.com
I. Specific Gravity Test (Flooded batteries only)
- Do not add water at this time.
- Fill and drain the hydrometer 2 to 4 times before pulling out a sample.
- There should be enough sample electrolyte in the hydrometer to completely support the float.
- Take a reading, record it, and return the electrolyte back to the cell.
- To check another cell, repeat the 3 steps above.
- Check all cells in the battery.
- Replace the vent caps and wipe off any electrolyte that might have been spilled.
- Correct the readings to 80º F (26.6º C):
• Add 0.004 to readings for every 10º F (5.6º C) above 80º F (26.6º C)
• Subtract 0.004 for every 10º (5.6º C) below 80º F (26.6º C)
- Compare the readings.
- Check the state of charge using Table 1 below.
The readings should be at or above the factory specification of 1.277 +/- 0.007. If any specific gravity readings register low, then follow the steps below.
- Check and record voltage level(s).
- Put battery(s) on a complete charge.
- Take specific gravity readings again.
If any specific gravity readings still register low then follow the steps below.
- Check voltage level(s).
- Perform equalization charge. Refer to the Equalizing section for the proper procedure.
- Take specific gravity readings again."
AND:
If you want to get the most out of your batteries, you really need to study both of those resources and develop a maintenance plan.