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From: (no name) (no email)
Date: Wed Dec 01 2004 - 00:21:03 EST
Quoting Ron Rogers <>:
For the rest of us, it may be time to look at Mastervolt or Charles
Industries. Newmar has highly rated chargers, but
> integrated inverter/chargers seem to offer higher amperage chargers to cope
> with our large house banks.
REPLY
Ron has touched on a key subject. Power demand has increased tremendously in
the past few years. However many peopl ealso prefer to remain at anchor for
extended periods of time without having to run any engine to recharge.
This has promoted the development of huge 1000 - 2000 amp hour battery banks.
When yo uget into such large banks the conventional design principles no
longer apply. Why select a 4000 watt inverter when you only need 1500 Watts.
However in order to get an inverter charger combo with the requisite charger
capacity you end up picking an over sized inverter.
At that point you are better off selecting seperate inverter and chargers.
Several manufactures now ofer charger than can be wired in paralle and work as
a synchronized unit. But remember it is only during the latter stages of
charging that very precise voltage and current regulation is ccritical.
Battery damage is more likely during the float stage or if ther battery
overheats during the bulk charge stage.
In my opinion system designers will have to take a new approach when dealing
with very large battery banks.
I'm currently doing a design for converting a 32V boat to 24V and providing
about close to 1000 amp hours of capacity. However the boat will not need more
than an 800 watt inverter. Everything is DC. So why install a 3kW inverter to
get the 150 amp charger and then lose most of it becausse the inverter is
running in a very inefficient part of the curve.
Cheers
Arild
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