Features
Eight step, fully automatic switch mode model.
Revives, charges, checks and maintains virtually all types of 12V lead-acid
batteries (Wet, MF, GEL and AGM) from 50Ah to 500Ah.
Desulphation mode with pulses.
Soft start for severely discharged batteries.
Recondition mode with controlled top charging recovers the capacity of a
severely discharged battery.
Maintenance pulse charging increases battery life and gives superb performance.
Charges even drained batteries.
Temperature compensated for optimal charging voltage at all times.
Low back current drain, low ripple and input voltage independent (170-260V).
High efficiency: 85%
The charger can be connected for months, ideal for seasonal vehicles.
Compact design with mounting holes for permanent assembly.
Delivered with the M300 starter, an extra charger for your starter batteries,
 with the same specification as the XS 800
5 year warranty.
Charging
The M300 charges and analyses in eight fully automatic steps. 
Desulphation, runs a complete charge cycle within a fraction of a second.
The cycle repeats during the whole desulphation phase. Every cycle recovers
some lead sulphate into useful material.
Soft Start tests the battery condition. Severely discharged batteries need
the soft start step. The charging continues for a maximum 4 hours until the
voltage reaches 12V.
Bulk, is the main step where most of the charge is returned (80%). The charger
delivers maximum current (25A) until the battery voltage has risen to the set
level (or for max 20 hours).
Absorption, completes the charge up to 100% at a constant voltage
(14.4V at 25°C). Concludes when the current drops below 3A, and a further
 4 hours of forming.
Analysis, is a short intermission in the charge cycle where the charger
analyses the voltage drop and tests the self-discharge. The voltage of a
defective battery will quickly drop. The charge cycle will be stopped with a
warning indication if voltage drops to 25.2V in 2 minutes.
Recond is used to recover severely discharged flooded batteries and for
reconditioning severely discharged batteries suffering from stratification.
The voltage increases (to max 15.9V) with reduced current (5A) for a limited
time period (depending on the charge level of the battery at start). The
higher voltage starts some gassing and mixing of the acid, which is beneficial
for both battery capacity and expected life. The battery could emit explosive
gas during this step.
Float is maintenance charge at constant voltage, keeping the batteries at 100%
 charge. In normal charging mode, float is time-limited (max 10 days) while
supply mode goes on indefinitely.
Pulse, maintenance charge. The state of charge varies between 95% and 100%. A
pulse is sent out to the battery if the voltage drops. This keeps the battery
in trim when not in use. The charger can be connected for months at a time.
Using the M300 gives your battery an optimum service life and operational
reliability.

Technical Data
MODEL M300
Input voltage AC 170-260VAC, 50-60Hz
Output voltage Nominal: 12V
Efficiency 85%
Charging voltage 14.4V, Temperature compensated
Charging current 25A max
Back current drain* <2Ah per month
Ripple** <4%
Ambient temperature -20°C to +50°C, output power is reduced automatically at
 higher temperatures.
Cooling Fan
Type of charger Eight step, fully automatic, switch mode with pulse
maintenance.
Type of batteries All types of 12V lead-acid batteries (Wet, MF, AGM and GEL).
 
Battery capacity 50-500Ah
Dimensions (L x W x H) 235x130x65mm
Insulation IP 44 (Outdoor use)***
Weight 1.4kg

*) Back current drain is what drains the battery if the charger is connected
without the power cord connected.

**) Ripple denotes the amount of interference there is to the current and
voltage. A high current ripple heats the battery and shortens its life. A
linear charger has a current ripple of 70 - 400% which is much larger than the
 maximum 5% for a modern sealed battery. Voltage ripple could harm other
equipment, which is connected to the battery.

The M300 delivers voltage and current with very low ripple. The battery gains
a long service life and there is no risk of damage to other electronic devices
 connected to the battery.