General Description - Victron energy MPPT 75/10 Manuel

1 General Description

1.1 Ultra fast MPPT tracking
Especially in case of a clouded sky, w hen light intensity is changing continuously, a fast
MPPT algorithm w ill improve energy harvest by up to 30% compared to PWM charge
controllers and by up to 10% compared to slow er MPPT controllers.
1.2 BatteryLife: intelligent battery management
1.2.1. Conventional battery management
When a solar charge controller is not able to recharge the battery to its full capacity
w ithin one day, the result is often that the battery w ill be continually be cycled betw een
a "partially charged" state and the "end of discharge" state. This mode of operation (no
regular full recharge) will destroy a lead-acid battery w ithin weeks or months.
1.2.2. BatteryLife algorithm
The BatteryLife algorithm w ill monitor the state of charge of the battery and day by day
slightly increase the load disconnect level until absorption voltage is reached. From that
point onw ards the load disconnect level w ill be modulated so that absorption voltage is
reached about once every w eek. The BatteryLife algorithm w ill substantially increase
service life of the battery w hen compared to 1.2.1.
1.2.3. Upsizing the PV array or regularly "downsizing" the load
A lead-acid battery w ill last even longer if a full recharge, including several hours
absorption time, is achieved at least once every week.
1.3 Load output
The load output is short circuit proof and can supply loads w ith a large DC input
capacitor such as an inverter (but it can not start a DC load and an inverter
simultaneously).
Alternatively, an inverter can be sw itched on and off by using the load output to sw itch the
remote on-off of the inverter (see section 3.6).
1.4 Internal temperature sensor
Compensates absorption and float charge voltages for temperature.
1