This is what I ended up buying:

https://www.digikey.com/product-detail/en/mean-well-usa-inc/EDR-120-12/1866-1440-ND/7702913

10 amps, din mount, can adjust up to 14 volts.
Propane furnace draws 3.7 amps. LED lamps add another amp. So there should be at least 5 amps available for charging. That is plenty.

I will probably start looking for a low voltage disconnect now.

-----Original Message----- From: Robert Andrews
Sent: Friday, December 28, 2018 6:00 PM
To: [email protected]
Subject: Re: [AFMUG] Battery charger + load

For some of my low power sites I actually use their OpenUPS

http://www.mini-box.com/OpenUPS?sc=8&category=1264

Hooked to a Pi Board which I modified the linux driver to get the stats
off the OpenUPS ( their drivers where failing with my version of linux
)...   Then power it off the USB port from a mikrotik switch.   I can
pull current rates, charge state, all the details of maintaining
batteries .

On 12/28/2018 04:16 PM, TJ Trout wrote:
http://www.mini-box.com/picoUPS-100-12V-DC-micro-UPS-system-battery-backup-system?sc=8&category=1264

On Fri, Dec 28, 2018 at 7:15 AM <[email protected] <mailto:[email protected]>> wrote:

    Yep, that is what I am looking for, but it sure isn’t cheap is it.
    *From:* Bill Prince
    *Sent:* Thursday, December 27, 2018 7:51 PM
    *To:* AnimalFarm Microwave Users Group ; [email protected]
    *Subject:* Re: [AFMUG] Battery charger + load

    I think the ones you're thinking about have "BCM" in the model
    number (for Battery Charge Monitor or something like that).

    Most of the ones I know about are made by Altech or Phoenix Contact,
    or a few others.

    Finding one that works for 12VDC is a bit of an odd duck; we are
    almost always looking for 24VDC or 48VDC. I did a little poking
    around and found this one from Altech that does 12VDC. Key thing to
    look for is "DC UPS".

    https://www.alliedelec.com/altech-corp-cbi123a/70236424/

    bp
    <part15sbs{at}gmail{dot}com>

    On 12/27/2018 4:35 PM, [email protected] wrote:
    I know it has been mentioned many times before, but I cannot
    remember if it is a Meanwell product or not.
    In my splicing trailer, I have a nice 12 volt DC fuse panel in
    addition to the 120/240 panel.
    The 12 volts runs LED overhead interior lights, porch light,
    furnace (I bought the one Bill recommended) and the trailer
    break-away brake circuit.
    I want a DIN rail mount charger rectifier.
    I believe there is one that has charging terminals that limit
    battery charging current as well as load terminals that are not
    limited.
    Seems like there was a BC in the part number.  Too lazy to try to
    figure out the archive.
    And I don’t recall any specific keyword stuff to make the search
    easy.

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