9.0 SYSTEM OPERATION
9.1 Startup Mode
When the E3MINI Series is first turned on using the System ON/OFF switch, it goes
through a sequence of self-tests which ensures proper connections are made and it also
checks for faults that may be present. The inverter must qualify several things before
advancing to the Battery Charging mode. There will be two distinct clicks of relays as it
goes through the self-check sequence. After all the Start-Up diagnostics are performed,
the E3MINI Series is OK to proceed to the Battery Charging mode.
9.2 Battery Charging Mode
The Battery Charging mode is where the system will remain for most of the products
life. In this mode, AC power is being passed from the INPUT AC through to the OUTPUT
AC and subsequently its loads are being powered and the internal battery charger is
maintaining a float charge. The charger is regulating or floating the batteries at 2.27
Volts per Cell (VPC) and is temperature compensated to 4mV per deg. C (per cell),
centered at 25
°
C. For higher temperatures, float voltages go down. For lower
temperatures, float voltages go up.
The E3MINI Series nominal DC battery voltage is 24 VDC for the 125 and 250W
model. The system float voltage is set to 2.27 VPC which corresponds to 27.24 VDC for
both 125W and 250W models.
Low Voltage Disconnect (LVD) is set to 1.67 VPC or 20.1 VDC for the 125W and 250W
models. Float voltage varies with temperature, LVD voltage is fixed.
Typical voltages that the E3MINI Series charger would float the batteries are:
10 Deg. C
27.60 VDC
15 Deg. C
27.48 VDC
20 Deg. C
27.36 VDC
25 Deg. C
27.24 VDC
30 Deg. C
27.12 VDC
35 Deg. C
27.00 VDC
40 Deg. C
26.88 VDC
Above 40 °C no additional compensation is performed.
E3MINI SERIES |
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