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Comments for Dead RV battery issue leaves owner in the dark

  • Last Oct. I replaced my Parallax converter with a Progressive PD-4655 to maintain and charge my two relatively new Interstate 12V Batteries over Winter.
    When I checked the SG last week both were in the Red at 1.200 and below. VDC WAS 12.5 on bat. Pwr. and 13.5 on charge.
    The dealers question was:” Is the Hydrometer calibrated for Deep Cycle batteries”?
    Never heard of such a thing.
    I understand that ALL batteries used the same acid; the difference being construction of the internals.
    Was his question valid?

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