Forklift batteries setting charger

osvaldo3

I Will like to know the setting charger for 48 volts forklifts batteries: eqlz voltage
Bulk voltage
Absorb voltage
Float voltage

myocardia

Until you tell us the manufacturer and the model number, or at least manufacturer and aH size, we can give you no better than generalizations.

osvaldo3

Model: Power Hawk 85
Voltage 2.10 svc
Capacity 1069 AH @ 20HR rate in 48 VDC

osvaldo3

> @myocardia said:
> Until you tell us the manufacturer and the model number, or at least manufacturer and aH size, we can give you no better than generalizations.

> @myocardia said:
> Until you tell us the manufacturer and the model number, or at least manufacturer and aH size, we can give you no better than generalizations.

Model: Power Hawk 85
Voltage 2.10 svc
Capacity 1069 AH @ 20HR rate in 48 VDC

osvaldo3

> @osvaldo3 said:
> > @myocardia said:
> > Until you tell us the manufacturer and the model number, or at least manufacturer and aH size, we can give you no better than generalizations.
>
> > @myocardia said:
> > Until you tell us the manufacturer and the model number, or at least manufacturer and aH size, we can give you no better than generalizations.
>
> Model: Power Hawk 85
> Voltage 2.10 svc
> Capacity 1069 AH @ 20HR rate in 48 VDC

Nominal cell voltage 2.10v open circuit
Specific gravity: 1.265@ 77f when fully charged

Estragon

I wasn't able to find anything using that make/model. As a rule, you want to start with manufacturers recommendation, and adjust from there based on your actual use and environment. I'm assuming these are flooded batteries. If sealed, disregard all that follows.

As a general proposition, you want to find voltages that keep battery specific gravity (SG) near what it was when the battery was commissioned, typically 1.25-1.30, in the time available for charging, and with SG fairly consistent between cells (<0.01). Reasonable starting voltages for an off-grid application might be; absorb = 58.8, float = 53.2, EQ = 60.8, all at 25°C (77°F) and adjusted lower for higher temperature and higher for lower temps. There is no such thing as bulk voltage. Voltage will rise from whatever it was until absorb voltage, at which point current will taper while voltage is held constant. There may be a maximum current in bulk though, possibly 200a or so in the case of a 1069ah bank.

If you find batteries aren't fully charged in the time available, increase voltage incrementally until you do, but while keeping battery temp under 110°F. If time available is higher, voltage can be a bit lower. If time available is limited (typical in off-grid or continuous shift operations), voltage may need to be higher. In any case, the objective is to get the batteries fully charged on a regular (weekly or better) basis.

Even with recommended values, it can take some experimentation to get a charging regime that works for your specific climate and application. Not having initial mfg recommendations, I've just given what I'd start with. These values (for flooded lead acid) IMHO are conservative and leave room to increase as required in actual use. FWIW.

osvaldo3

Ok thanks