Freedom Lite Marine Installation Manual Revision 1
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ii.
the voltage of any individual cell is below the maximum cell voltage setting
(3.75V)
iii.
the temperature of the pack is inside of its operating range for charging (0 to
50°C)
iv.
The State of Charge (SOC) has dropped below a defined level since the last
charge enable period (99%).
v.
The defined delay time for a repeated operation of this relay has elapsed (3
minutes if below 99%, 15 minutes if 99% upwards)
2.
Inverter Discharge Enable (Blue) - this is achieved using a pair of potential free
contacts from an external relay. This relay is normally open and is only closed if the
Battery Management System (BMS) is satisfied that the battery may provide a
discharge current. The relay is closed when the BMS allows current to sink through it
via the applicable signal wire (see Table 4.1). The closing of this relay will then enable
the external discharge equipment, namely the inverter (note this is intended to
control the inverter section of the inverter/charger device independently of the
charger in the same device). The standard parameters for determining this are
programmed into the BMS by Freedom Won prior to delivery. Freedom Won or
approved installers can alter these parameters if a non-standard configuration is
required. The standard configuration is to enable the inverter (discharge of the
battery) so that it may begin providing power to the load only if:
i.
there are no errors (trouble codes) registered by the BMS that would affect the
ability of the battery to safely provide a discharge current (there are numerous
protection algorithms and not all are detailed here)
ii.
the voltage of any individual cell is above the minimum cell voltage setting (2.8V)
iii.
the temperature of the pack is inside of its operating range for discharge (-20 to
55°C)
iv.
The State of Charge (SOC) is above the defined minimum discharge setting
(usually 10%)
v.
If this relay has had to disable the inverter because of reaching the minimum
setting in (iv) above it will not re-enable until the State of Charge (SOC) has risen
above the defined minimum re-enable SOC (usually 15%)
vi.
The defined delay time for a repeated operation of this relay has elapsed (3
minutes)
3.
Inverter Charge Enable (Grey) – this is achieved using a pair of potential free contacts
from an external relay. This relay is “normally open” and is only closed if the Battery
Management System (BMS) is ‘satisfied’ that the battery may receive a charge
current. The relay is closed when the BMS allows current to sink through it via the
applicable signal wire (see Table 4.1). The closing of this relay will then enable the
external charge equipment. The standard parameters for determining this are
programmed into the BMS by Freedom Won prior to delivery. Freedom Won or
certain approved installers can alter these parameters if a non-standard
configuration is required. The standard configuration is to enable the mains charger
