48v flooded led acid battery lower max charge voltage good?

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Follow the manufacturer recommendation for your batteries or you will throw hundreds of dollars if not thousands of dollars of batteries prematurely in the trash. You will kill your batteries sooner if the voltage is not right per your batteries and manufacturer recommendations.
Sooner or later you have to equalize your batteries and the voltage will go up another 3-4 volts to do that. So choose the right equipment.

A 48 volt battery bank needs around 60 volts to be charged properly, depending of manufacturer of the battery. period !!!!!
12.5 volts for an 12 volt nominal battery is NOT a 100% charge, not even after a 24 hour resting time.

If the original poster would had followed your recommendation, then he/she would had killed the batteries about 60% sooner and would had ended up with hundreds of pounds of dead boat anchors.
So, it is rude to assume to know something while it is not the case and tell someone basically a lie and with it a possibility to destroy hundreds or thousands of dollars worth of property/items/batteries. 

tytower , in the GRAPH that you posted, it clearly shows STAGE 2 - CHARGING VOLTAGE of 2.35 Volts per cell.
~56 Volts CHARGING = 2.35 volts per cell x 24 cells
Your own graph refutes your absurdity.

And worse yet ...
Trojan, a major battery manufacturer with engineers that know way more about Lead Acid batteries than you do,
states, "Absorb Charge at 14.7 volts to 15 volts per 12 volt battery"
58.8 volts CHARGING = 14.7 volts x 4 batteries
60.0 volts CHARGING = 15.0 volts x 4 batteries

The 12.5 Volts that you are discussing is the RESTING VOLTAGE, with no load and no charger connected for at least 24 hours !!!
The Resting Voltage has nothing to do with the proper charging voltage.
tytower , you clearly do not know what you are talking about.

Contrary to your bad "boiling" theory, we must bubble the electrolyte in a Flooded Lead Acid battery to stir the electrolyte.
tytower , you clearly do not know what you are taking about.

I FLOAT my batteries at 13.5 Volts.
There is no significant charging even at 13.5 Volts.
tytower , you clearly do not know what you are taking about.

Chronic Undercharging  a Flooded Lead Acid battery, like you suggest, will lead to sulfation and an early death.
tytower , you clearly do not know what you are taking about.

tytower ,  You are ridiculously wrong. And you need to educate yourself on 3 Stage Charting Methods per engineers at Trojan, Rolls & Johnson Controls, etc.
And I agree with @db , you should NOT be giving any battery charging advice.



fabieville ,
WHY did you purchase a Pure Sine Wave inverter that only allows only 57.1 volts max, when you know the battery voltage may be, up to 60 Volts?
If true, that was a very bad choice.
When you Equalize the Battery Bank the charging voltage will be near 60 Volts.

I did a google search for Nova 300 Watt PSW and it states, "42 V - 60V DC Input"
So, why / how is your Nova inverter limited to a very low 57.1 Volts?

I provide real FACTS that will help the OP and have proved that your first set of opinions are wrong - very wrong.
Your latest reply offers the OP nothing (again), because you know your original advice was just garbage.