Xantrex Technology RM1012 - Manual (Page 15)

Planning for AC loads
2–3
DC loads
DC loads are those that run off the 12 V electrical system on the truck. A
few examples of DC loads are:
• marker lights, headlights, cab lighting, other lights using DC power
• DC refrigerators
• CBs
• factory-installed radios or sound systems
DC loads and the inverter/charger both rely on the batteries for power.
Many DC loads running at one time will shorten the operating times of
AC loads.
Problem loads
These are loads you should not operate from inverter/charger because
they may be damaged or may not operate properly:
• dimmer switches
• some small rechargeable hand power tool chargers
• small battery-operated appliances such as flashlights, razors, night
lights
• variable speed motors
Ambient temperature
Ambient
temperature The ambient temperature, that is, the air temperature around the
inverter/charger will affect its output power.
The air temperature around the inverter may be much hotter than away
from the vehicle. If your truck is standing on hot pavement, the
temperature may be quite high near the inverter.
Temperature
and power Generally, the output power decreases as the temperature increases. For
example, at 77 °F (25 °C) the unit delivers 1000 watts for as long as you
have sufficient battery power. At 104 °F (40 °C) it delivers 1000 watts for
up to 10 minutes before shutting down or 750 watts continuous, or 2000
watts for 2 1/2 minutes.
Figure 2-1 shows the relationship between ambient temperature and the
length of time the unit will supply an output power level. Choose the
curve with temperature range most closely approximating that of the
inverter/charger location, then look for the time in minutes. The