FAQ:Electrical System
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© 2016 by Erwin Hymer Group North America, Inc.
FAQ:Electrical System
Electricity
Battery Bank
The heart of the E-Trek electrical system is the battery bank. The EcoTrek batteries require no maintenance, and store
electrical power created by the solar panel, engine generator, vehicle alternator, and shore power for future use. When
driving the vehicle, the engine generator will charge your batteries so that you will arrive at your camping location with fully
charged batteries. As you use power, the batteries will be depleted. The solar panel continuously charges the batteries under
daylight conditions, and will extend the time between recharges, but typical electrical usage levels are greater than the panel
will produce. When your battery indicator level gets low, idle the engine to allow the engine generator to recharge the coach
and chassis batteries. Typically, 30-40 minutes will restore a moderately depleted battery bank to an adequately charged
condition. In instances when the batteries are depleted further, such as when running the air conditioner for extended
periods, you may need to idle the engine for longer periods.
How Long to Charge
When running the inverter, a minimum battery charge will be preserved by a "power save" setting in the inverter that emits a
small alarm telling you to charge the batteries. From the point of that alarm, assuming you are not running a lot of appliances
at the same time, you can charge your batteries to the point that will allow you to return to normal usage in 30-40 minutes
(do not stop charging at that point). If you run the batteries right down with the inverter off, you may need to charge them for
up to 2 hours before you can return to normal use.
Multiple Charging Sources and Charge Times
The battery system holds a theoretical maximum of 9600 watt-hours of power, and how long a battery charge lasts depends
on what all you are using to recharge and what you are running. If you run nothing in the coach you can recharge with just
the underhood generator at a rate of up to 3000 watts per hr. If you are plugged in to a 110 volt electrical outlet, you can also