Samlex America SAM-3000-12 - Manual (Page 11)

8 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 9
SECTION 4 | Installation
3. Do not use with Positive Grounded Electrical Systems (the majority of modern automobiles,
RVs, trucks and boats use Negative Grounded Electrical Systems).
4. Observe correct polarity when connecting the DC input terminals of the inverter to the
battery. Connect Positive of the battery to the Positive input connector of the inverter and
the Negative of the battery to the Negative input terminal of the inverter. Reverse polarity
connection will result in a blown fuse and may cause permanent damage to the inverter.
Damage due to reverse polarity is not covered under warranty.
requirements of Dc input power Source
approx. Dc input current required by inverter = power consumed by the ac Load in
Watts ÷ 10.
DC input currents at Continuous Rated Power Output are shown (Table 4.1 below):
table 4.1 Dc input current
model rated input current
SAM-1000-12 100A
SAM-1500-12 150A
SAM-2000-12 200A
SAM-3000-12 300A
12VDC input to the inverter should be fed from a 12V Battery System or from a 12.5VDC
to 15VDC Regulated DC Power Supply. If a DC Power Supply is used, its output current ca-
pacity should be more than 2 times the maximum DC input current drawn by the inverter.
further explanation of operation is based on Dc input power from a 12V battery. It is
recommended that Deep Cycle Type Batteries are used. For detailed technical information
on types, construction, specifications, sizing, connections and charging / discharging of
Lead Acid Batteries, please read online White paper titled “Batteries, chargers and
alternators” at www.samlexamerica.com under Support/White papers.
connecting Batteries
Series connection
Fig. 4.2 Series Connection
6V Battery 6V Battery
12V Battery 12V Battery 12V Battery 12V Battery
6V Battery 6V Battery 6V Battery 6V Battery
12V String 1 12V String 2
Battery 1 Battery 3 Battery 2 Battery 4
Battery 1 Battery 3 Battery 2
Battery 4 Battery 3
Battery 4
12V
Inverter/
Charger
12V
Inverter/
Charger
Cable “A”
Cable “B”
Cable “A”
Cable “B”
Cable “A”
Cable “B”
6V Battery
Battery 2
6V Battery
Battery 1
24V
Inverter/
Charger
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