Cristec YPO45-12-60/MPPT Manual Del Usuario página 41

BOOST voltage (see table above – paragraph 3.3.2)
V BOOST:
V FLOAT:
T BOOST:
ABSORPTION maximum duration (see table above – paragraph 3.3.2)
T ABS:
BOOST phase:
Starts up automatically when the MPPT is turned on if the battery is flat. The current is then at maximum output.
ABSORPTION phase:
Begins when the voltage has reached the maximum BOOST level. The current level starts falling.
These two phases combined last a maximum of TBOOST+TABS (depending on setting). If the current falls below 20%
of rated current (2A in the case of the Lithium curve Iron Phosphate with BMS with a minimum time of 10 minutes), the
FLOATING phase automatically kicks in. Duration and current intensity depend on how charged the battery is.
FLOATING phase:
Starts after TBOOST or if output current has reached 20% of the MPPT's rated current. The voltage switches to the
FLOATING value and the charging current continues to drop.
REFRESH phase:
It is an automatic weekly cycle (Inhibited or not if mode REFRESH is selected) in order to optimize the battery life
duration.
It will occur only after a complete recharge cycle (BOOST, ABSORPTION and FLOATING). The MPPT will generate
automatically a safe timed voltage step every 7 days whatever the position of BOOST switch.
REBOOST phase:
Automatic phase consisting in coming back to a BOOST voltage if the DC utilizations require it (i.e. after a complete
recharge cycle BOOST, ABSORPTION and FLOATING if some DC constant consumptions are detected the MPPT
will restart a new complete charge cycle including a BOOST phase).
This REBOOST phase will be authorized after measuring certain battery voltage during a determined time.
When BOOST mode is OFF
With this setting, the YPOWER MPPT produces a single-stage UI type charge curve. It generates a constant voltage,
supplying the current required by the battery(ies). Recharging time depends on the state of the battery, being longer than
when the BOOST is in the ON position.
FLOATING voltage (see table above – paragraph 3.3.2)
BOOST maximum duration (see table above – paragraph 3.3.2)
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