Campbell Scientific Morningstar SunSaver-10 10A 12V Regulator - Manual (Page 11)

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the PV system. Battery charging is managed by a constant volt-
age PWM algorithm that has been optimized for PV systems.
The only manual tasks performed by the operator are:
a. Installation (see Section 5.3 )
b. Battery type selection (see Section 5.3-7)
c. Maintenance (see Section 6.3)
6.2 O PERATION AND F UNCTIONS
The PV system operator should become familiar with the fol-
lowing operating functions and design of the SunSaver con-
troller. Refer to the Technical Specifications (Section 8.0) for
actual setpoints and other parameter values.
• 100% Solid State
All power switching is done with FETs. No mechanical relays
are used in the controller.
• Battery Charge Regulation
SunSaver uses an advanced series PWM charge control for
constant voltage battery charging. A true 0 to 100% PWM
duty cycle is very fast and stable for positive charge control
under all system conditions.
• Temperature Compensation
A sensor next to the green LED measures ambient temp-
erature conditions. The SunSaver corrects the constant
voltage setpoint –28 (–56 for 24V) mV per °C with a 25°C
reference. This correction matches the battery charging
to the changing electrochemical properties of the battery,
and works best if the battery and controller are in a similar
thermal environment.
• Sealed / Flooded Select
Flooded batteries require more vigorous charging to avoid
stratification, and sealed batteries require precise control to
avoid outgassing. The SunSaver constant voltage setpoints
are 14.4 (or 28.8) volts for flooded batteries, and 14.1 (or
28.2) volts for sealed batteries. See Section 5.3-7 for more
information.
• LED Indicators
See Section 4.0