Xantrex SW and battery configuration [RE-wrenches]

[William Miller]

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Marco:

In the 1990s when MPPT controllers were not available, this might have made 
sense.  Now there here, why not stick with a 48 VDC battery bank and 
configure your PV for 72VDC with a Blue Sky or MX60?  (Will the Blue Sky do 
72 VDC PV array?)

William Miller









>I don't know how many of you tried this back in the olden daze of the late
>1990s, but I remember being convinced by a Trace tech to try a 54 volt
>battery bank with a 4048 or 5548 in order to allow the nominal 48V array to
>spend more time at its MPP.  (This assumes the use of a non-MPPT charge
>controller.)  So, I did several systems with a 54V battery bank.  Well, for
>the first time in years, I'm doing a SW4048 NEM system here in Hawai'i and
>am wondering if it will make much of an appreciable difference in terms of
>overall system output over time if I go with a 54V battery rather than 48V.
>
>
>Any thoughts or actual experience comparing output between the two
>configurations?
>
>aloha,
>marco

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