X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 24 Jan 2013 08:32:00 -0500 Message-ID: X-Original-Return-Path: Received: from [137.118.16.51] (HELO smtp1.av-mx.com) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 6026792 for lml@lancaironline.net; Wed, 23 Jan 2013 21:46:40 -0500 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.51; envelope-from=pinetownd@volcano.net Received: from DennisPC (unknown [65.170.221.130]) (Authenticated sender: pinetownd@volcano.net) by smtp1.av-mx.com (Postfix) with ESMTP id 0DA77292A26 for ; Wed, 23 Jan 2013 21:46:03 -0500 (EST) X-Original-Message-ID: <05AD52E124C94604B3E26AD663ED22C1@DennisPC> From: "Dennis Johnson" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [LML] Over voltage X-Original-Date: Wed, 23 Jan 2013 18:46:10 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_2A99_01CDF999.E92FF840" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_2A99_01CDF999.E92FF840 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Charge voltage varies a little depending on different battery chemistry. = My Panasonic battery came with instructions to charge between 14.5 and = 14.9 volts. If your battery didn't come with instructions, you might = check the manufacturer's web page. However, I don't think there is = anything magic about these numbers. Our batteries are rarely at the = optimum temperature anyway, so a few tenths high or low isn't cause for = worry. =20 I'd suggest adding an overvoltage disconnect to protect your electronic = equipment from high voltage and then set up your engine monitor to alert = you to low voltage, which will happen within a minute or two after the = overvoltage module disconnects the alternator. I can't say if 16 volt excursions damaged your electronics. Many = components now are set up to operate on 12 and 24 volt systems; those = would take 16 volts without trouble. But in our experimental world, = it's hard to say how robust every component is. Install an overvoltage = disconnect and you won't need to worry about it. =20 Unless your batteries specify it, I would think that a constant charge = at 16 volts would tend to boil off the water, which is not good. =20 Dennis Legacy ------=_NextPart_000_2A99_01CDF999.E92FF840 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Charge voltage varies a little = depending on=20 different battery chemistry. My Panasonic battery came with = instructions=20 to charge between 14.5 and 14.9 volts. If your battery didn't come = with=20 instructions, you might check the manufacturer's web page. = However, I=20 don't think there is anything magic about these numbers. Our = batteries are=20 rarely at the optimum temperature anyway, so a few tenths high or low = isn't=20 cause for worry.

I'd suggest adding an overvoltage = disconnect to=20 protect your electronic equipment from high voltage and then set up your = engine=20 monitor to alert you to low voltage, which will happen within a minute = or two=20 after the overvoltage module disconnects the = alternator.

I can't say if 16 volt excursions = damaged your=20 electronics. Many components now are set up to operate = on 12 and=20 24 volt systems; those would take 16 volts without = trouble. =20 But in our experimental world, it's hard to say how robust every = component=20 is. Install an overvoltage disconnect and you won't need to = worry=20 about it.

Unless your batteries specify it, I = would think=20 that a constant charge at 16 volts would tend to boil off the water, = which is=20 not good.

Dennis

Legacy

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