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7.2 MHC2500 Control Panel Charge Theory
The MHC2500 Control Panel is an advanced fully automatic 3-stage charge
control system. Because of this, the charge system provides enhanced battery
performance with less mainenance.
7.2.1 Multi-Stage Charge Control
Bulk Charge
• Bulk charge begins when battery voltage drops below the turbine start
voltage setpoint. The system remains in bulk charge while battery voltage is
below the acceptance charge voltage setpoint. While in bulk mode maximum
power generation will be targeted.
Acceptance Charge
•
When the battery recovers sufficient charge for voltage to rise to the
acceptance charge voltage setpoint current is reduced as necessary to control
at the acceptance voltage. The charge controller remains in acceptance for a
set time as specified by the acceptance time setpoint.
Float Charge
•
Once the battery is fully charged a somewhat lower float voltage is applied
to maintain the battery in a fully charged state. In float charge the control panel
will modulate turbine output to maintain charge level until the battery bank no
longer accepts additional charging.
Equalize
In addition to the 3-stage charging a manual equalize function is included
to periodically condition lead-acid batteries. Periodic equalization improves
battery performance and life by bringing all battery cells up to the same specific
gravity and eliminating electrolyte stratification. Equalization voltage is set by the
system setpoint and duration is set by the equalization time setpoint.
Charge Mode
Approximate Charge Level
STOP
BULK
<70% FULL
ACCEPTANCE
75% TO 95% FULL
FLOAT
FULLY CHARGED
EQUALIZE
----------------
7.2.2 Automatic Current Limit
The control panel has an automatic built in current limit to prevent damaging
the internal wiring and components. Automatic current limit is set by the current
setpoint. Current from the generator is limited through modulation of the
electronic motorized valve.
Summary of Contents for M300 Pico
Page 1: ...M300 Pico Hydro System Installation Operations Maintenance Version 2 0 0 1 ...
Page 2: ...Page 2 ...
Page 4: ...Page 4 ...
Page 6: ...Page 6 ...
Page 8: ...Page 8 ...
Page 16: ...Page 16 ...
Page 17: ...Page 17 4 Equipment Installation ...
Page 29: ...Page 29 5 System Operation ...
Page 36: ...Page 36 ...
Page 37: ...Page 37 6 Maintenance ...
Page 39: ...Page 39 7 Appendix ...
Page 48: ...Page 48 7 4 Equipment Drawings and Performance Curves ...