The current graph
What do I expect to see from this unit and why?
Engine priority
System voltage graph:
The domestic current graph clearly shows the constant
current charge between points
, at position the current starts to taper off
The illustration below shows results from bench tests representing a typical
until it reaches position 10. The accuracy of the software can be seen when the
split charge system with an engine battery of 100 amp hr (standard lead acid)
voltage drops from the high voltage charge to the constant voltage charge
and a domestic battery of 3 x 100 amp hr (standard lead acid). The engine
(float), the current only dropped 5 amps, (at position
) showing without
battery was discharged to 11 volts (about 10 engine starts) and the domestic
doubt that the software program was spot on, the batteries could not accept any
bank to about 11 volts (will no longer run an inverter and is about 60% empty) .
more positive charge and were clearly full. The high charge voltage is
The alternator used was a Bosch 90 amp with a standard 13.9 volt (variable)
maintained between voltage positions
at 14.8 volts .
regulator. The unit battery type is programmed to open lead acid. There are 2 x
graphs, one is the current delivered into the batteries, and the other is various
Position
shows that through the whole process the engine battery continues
voltages measured on the system.
to charge and is not deprived of its charging voltage, the engine battery
performance is the most important as at the end of the day it must be able to
The key points to pick up on here are:
restart the engine.
The yellow trace (alternator voltage into the unit) clearly shows the system
doing its job it is designed to pull this voltage down a little to enable the
standard alternator regulator to produce its full current, you can clearly see that
the standard alternator voltage is at position
on the voltage curve, however
the input voltage has been pulled down to position , the effect on the
alternator output current is full output at position - , where you can clearly
see the standard alternator current without the advanced charging system taper
down fast from 80 - 30 amps over the same time (from position
2-3).
The
advanced charging equates to about 70 amps improvement over the standard
non assisted alternator.
Position : This is the most interesting stage where the magic is at work, the
point where the domestic battery voltage exceeds the alternator input voltage,
this is what the advanced charging process is all about.
8-9
9
10
6-7
11
4
5
8 9
1
0 . 0 0 0
0.010
0.020
0.030
0.040
0.050
0.060
0.070
Am
ps
time in mins
amps
11
12.50
13.00
13.50
14.00
14.50
15.00
alternator input voltage
starter battery voltage
domestic battery voltage
0.080
0.090
0.100
100
90
80
70
60
50
40
30
20
10
0
time in mins
volts
Domestic battery current
Starter battery bank current
Domestic battery bank current curve, with engine battery bank current curve
Engine battery bank, domestic battery bank, and alternator voltage curves
4
5
10
What a Standard alternator current curve was without the voltage amplifier
9
1
8
2
8
3
7
4
6
5
5
6
4
7
3
8
3
9
2
1
0
1
1
1
0
1
1
9
1
2
8
1
3
8
1
4
7
1
5
6
1
6
5
1
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4
1
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3
1
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3
2
0
2
2
1
1
2
2
0
2
2
9
2
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8
2
4
8
2
5
7
2
6
6
2
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5
2
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2
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3
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1
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2
2
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3
1
4
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0
4
4
9
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1
1
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1
1
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1
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1
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6
1
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1
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1
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2
2
1
1
2
2
0
2
2
9
2
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2
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2
5
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2
6
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2
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5
2
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2
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3
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1
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1
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3
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1
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2
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1
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0
5
5
9
5
6
8
5
7
8
5
8
7
9
2
8
3
1
6
7
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