Projecta INTELLI-RV Instruction Manual page 7

2.2 Battery Charging of House/Service Battery
The charger automatically starts when the appropriate power is connected, either from grid, generator or solar.
With multiple charging stages (Soft-start, bulk, absorption, float & recycle), the PM235C is designed to fully charge the service battery
quickly.
The PM235C features Microprocessor-controlled charging algorithms. The Float and Recycle charging programs ensure that the battery
condition does not change despite being connected for a long period.
When the Charger is at Float Stage, if a new input source is added (AC Mains or Solar), the charger will return to the Bulk stage.
VOLTAGE
11.5V
lcc
CURRENT
½ lcc
STAGE
SOFT START
1
SOFT START
1
Increases battery life by gently starting to charge the battery 5% of bulk
BULK
2
Reduces charging time by delivering maximum charge to set voltage life by
gently starting to charge the battery 25% of bulk
Battery Temperature & Voltage Sensor
The optional battery temperature sensor (P/N: PMBS-3m) can be used with the PM235C to measure the temperature of the battery, allowing
the PM235C to to adjust, in real time, the charge to the battery, at a compensation rate of -4mv±10%/ºc/cell. In installations where the BTS is
not present, the PM235C will use 25ºC as a default setting. The voltage sensor can automatically adjust its output to compensate the voltage
drop caused by a cable. This assures the right voltage is being delivered for optimal charging.
Adjustable Charging capacity
Users can adjust the charging current by specifying the battery capacity. The charging current is set at threshold rate of 10% the of the
battery capacity (I = 0.1C) by default
Lithium Battery Charging
The PM235C can be configured to charge Lithium batteries. With Lithium batteries, the max charging current will automatically be set at
30% of battery capacity (Imax=0.3C)
2.3 Vehicle Battery Charger
Along with a powerful charger for the service battery, PM235C offers a float charge of up to 3A to keep the starter battery topped up,
whether connected to AC mains or PV (Solar). When the starter battery is less than 12.4V, the PM235C starts charging after a 30 minute
delay, and stops charging when the voltage reaches 12.8V
2.4 Power Supply Mode
If no battery is attached to PM235C Unit, it will automatically work as a power supply with a 12.8VDC output.
5 hours
BULK ABSORPTION
2 3
1 hr
5mins
FLOAT RECYCLE
4 5
ABSORPTION
3
Ensures a full charge to the battery without overcharging
FLOAT
4
Float charge maintains the battery at 100% charge
5 RECYCLE
Figure 6
Charging Algorithm
Icc is the rated current.
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