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SECTION 4 |
Online Mode is suitable for installations where both Grid and Photovoltaic (PV)
Solar Battery Charging System are available. It is also desirable in areas where
Grid / Utility Energy Rates are very high and use of supplementary battery based
photovoltaic power system is more cost effective.
Charger Only Mode: In Off-grid DC powered homes, for efficiency consideration, all
lighting and other loads / appliances are normally powered from 12V batteries that are
primarily charged through solar / wind power. Generator backup is used for powering AC to
DC battery charger for charging the batteries during extended periods of cloudy / no wind
conditions. To meet this requirement, the EVO
charger ONLY. Details are given below:
When "Charger Only" Mode is selected (ONLINE MODE: 2=Charger Only - See Section
4.4.2.13 in the EVO-RC-PLUS Manual), the EVO
the batteries and pass through the AC input power to the loads as long as AC input is
available (In DC powered homes, 120 VAC pass through will normally not be used as all the
loads will be DC)
When AC input fails, the Inverter Section will NOT be activated and the EVO
"Standby Mode" as long as AC input is NOT available. In "Standby Mode", the EVO
extremely low power from the batteries (< 5W)
For further details, please refer to the following Sections of the EVO-RC-PLUS Manual:
•
Section 4.1.3.1: Screen No. 13 of "Select Parameter Menu Map for Group 1 – CHARGE
CURVE" at Fig 4.2
•
Section 4.4.1: Screen No 13 of Table 4.3 for "Group 1 Parameter Set Up: CHARGE CURVE"
•
Section 4.4.2.13: "Charger Only Mode" under ONLINE MODE
4.7 TEMPERATURE SENSOR FOR BATTERY CHARGING
Battery Charger Temperature Sensor Model EVO-BCTS (Fig 2.5) has been provided to ensure
optimum charging by modifying the charging voltages based on temperature if the battery
sees very wide temperature swings. Temperature compensation can be programmed with the
help of optional Remote Control EVO-RC-PLUS (see Section 4.4.2.5 in EVO-RC-PLUS Manual).
Range is -3 to -4 mv/ °C/cell (Default is -4 mv/ °C/cell). Without temperature compensation,
the battery life is likely to be drastically reduced because the battery will be undercharged
during cold conditions (will build up sulfation) or will be overcharged during hot conditions
(will boil and lose excessive water). Please read White Paper titled "Batteries, Chargers &
Alternators" available online at www.samlexamerica.com (Home > Support > White
Papers) and Section 5 titled "Battery Charging in EVO
4.8 PARALLEL OPERATION WITH EXTERNAL SOLAR CHARGE CONTROLLER
The Battery Charger Section is able to operate in parallel with external Solar Charge Controller with
a charging capacity of up to 50 A. The output of the external charging source is routed through this
unit and operates in parallel with the internal charger. The internal charging current is controlled to
ensure that the combined current fed to the battery does not exceed the programmed Bulk Charg-
ing Current. This improves the life of the battery. Please see Section 5.4 for more details.
78 | SAMLEX AMERICA INC.
General Description & Principles of Operations
can be programmed to operate as a battery
TM
will operate as a battery charger to charge
TM
Series" for more details.
TM
will operate in
TM
draws
TM
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