Is this for the charge controller or the inverter?   Is it on grid or off grid?  What is the temperature variation in the room?

I usually don't worry about a temp sensor on the inverter off grid, if the batteries are not seeing a big variation in temperature.  Since the inverter isn't used much for charging, except when the battery is low, I set the inverter charge voltage fairly high, and tell the customer to just use the generator to get up to 70% - 80%, then let the solar do the rest.  In this scenario the temp sensor really isn't coming into play.

However, If its an on grid backup system where the inverter is involved with charging on a daily basis, then yes, the temp sensor is important, again only if the battery room is seeing more than a 20 degree variation.  Also the temp sensor wires can be repaired: cut out the bad section and use outdoor rated telephone splices with the silicone sealant, and heat shrink over that.

As others mentioned, using the wrong sensor is going to cause way more trouble than its going to fix.  They have different resistance values and some have reverse logic from others.  I've seen faulty temp sensors literally cook batteries, so if you're not absolutely sure, don't connect it.

I have a few old Trace sensors, but there only going to a system that really needs them.  Contact me off list.

Ray Walters
Remote Solar
303 505-8760

On 8/5/18 7:01 AM, Chris Schaefer wrote:
It's a dual labeled 1997-2002 vintage Xantrex/Trace unit and the old BTS is yellow with an RJ-11 connector. Upgrading the client to a new bank of Surrettes and in order to be warranty compliant the system must have a BTS. So what have the older, wiser wrenches done for a replacement? Does anyone have one of these lying around that I could purchase? I'll contact Xantrex/Schneider on Monday to see if they are still available since they do still sell the C60 CC and perhaps the newer BTS are compatible.

Thanks,
Christopher

On Sat, Aug 4, 2018 at 7:17 PM, Dave Angelini Offgrid Solar <[email protected] <mailto:[email protected]>> wrote:

    What color wire? The old Xantrex SW & SW+ were yellow. I can't
    remember the color of the Trace anymore...  --Dave

    Bill the BTS are generally different.
    You definitely don't want interchange BTS's... If you use a
    Midnite sensor with an Outback itll appear as a very hot battery
    and the charger won't charge.
    There are just differance between the varistor that is potted for
    most companies.

    On Sat, Aug 4, 2018, 6:25 PM <[email protected]
    <mailto:[email protected]>> wrote:

        Fellow wrenches,
        Am I missing something? Other than the way the sensor
        connects to the inverter/CC/??? is this not simply a
        thermistor/other discrete component with the appropriate
        output? Yes, it is potted for preservation in the potentially
        acid vapor environment, and provided with glue when the
        attachment is other than the terminal and again, the
        connector is specific to each manufacturer.
        Thanks for your input,
        Bill Loesch
        Solar 1
        Saint Louis, MO
        314 631 1094

        -----------------------------------------

        From: "Chris Schaefer"
        To: "re-wrenches"
        Cc:
        Sent: Saturday August 4 2018 4:04:47PM
        Subject: [RE-wrenches] battery temp sensors for older
        Trace/Xantrex inverters

        Good Day All,
        Running into a lot of missing or chewed up battery temp
        sensors for the older Trace inverters. I'm looking for
        potential replacements. Anyone had any luck using another
        vendor or do you have a direct replacement source for these?
        Thanks,
        Christopher-

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