Power Supply Mode; Mppt Solar Charger Controller; Voltage Charging Relay (Vcr) - Projecta IntelliJay PM300-BTJ Instruction Manual

VOLTAGE
11.5V
lcc
CURRENT 1/2 lcc
STAGE
SOFT START
SOFT START
1
Increases battery life by gently starting to
charge the battery at 50% charge rate for
10 minutes if the battery is less than 11.5V
2 BULK
Reduces charging time by delivering
maximum charge to set voltage
Battery Temperature Sensor
The PMBS (battery sensor cable) is connected to measure the temperature of the battery and automatically adjusts, in real time, to charge the
battery properly at compensation rate of – 4mv±10%/°C/cell. In case PMBS is not present, the PM335J will use 25°C as default.
Voltage Compensation Charging
With a voltage sensor the PM335J 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 15% the of
the battery capacity (I = 0.15C) by default.
Lithium Battery Charging
The PM335J can be configured to charge a lithium battery. With a lithium battery, the max charging current will automatically be set at
30% of battery capacity (Imax = 0.3C).

2.3 Power Supply Mode

If no battery is attached to PM335J unit, it will work as a power supply automatically with a 12.8VDC output.

2.4 MPPT Solar Charger Controller

PM335J has a built-in MPPT charger for the house battery with:
• Max input voltage 50VDC
• Max charging current 30A
2.5 Voltage Charging Relay (VCR or commonly known as a VSR)
As a Safety feature, the Slide Out (+L12) and Awning (L13) outputs are disabled when towing vehicle is connected to the Caravan (and
vehicle battery voltage is detected at >5V). To enable these outputs again, disconnect the vehicle's power plug from the caravan. If the
VCR is still engaged, press the PWR button on the LCD or app ON / OFF / ON.
LEAD ACID BATTERY – When the vehicle battery reaches 13.4VDC with threshold time delay, the VCR will charge the house battery from
the alternator. The VCR will continue the charging until the vehicle battery voltage drops under 12.8VDC.
LiFePO LITHIUM BATTERY – When the vehicle battery reaches 13.7VDC with threshold time delay, the VCR will charge the house battery
4
from the alternator. The VCR will continue charging until the vehicle battery voltage drops below 13.3VDC with less than 2A charge to the
house battery with threshold time delay.
NOTE: The PM335J, when charging from the vehicle battery, does not provide the 5 stage charge.
It simply takes whatever power and charging is available from the alternator.
NOTE: If your vehicle is fitted with a smart alternator, the VCR charge system (Variable Voltage or Temperature Compensating), the VCR
charge system may not function correctly and a Projecta IDC25 charging system is recommended.
Please contact Projecta for further information.
BULK ABSORPTION
1 2 3
Figure 6 Charging Algorithm
10 days 1 hr
5mins
FLOAT RECYCLE
4 5
ABSORPTION
3
Ensures a full charge to the battery
without overcharging
4 FLOAT
Float charge maintains the battery at
100% charge
5 RECYCLE
Restarts the charge every 10 days.
CHARGING
ALGORITHM
lcc is the rated
current.
7