Hmm. Well, yes, there are two batteries in it but I can't tell the Ah.
I'll find out soon, when the power goes off :)
You seem reasonably confident that the charger won't overload, it will
just take longer. My concern is that it might be designed to safely
charge at some current level just long enough to get the matching
batteries to float state. If I hook up something larger, then the high
current will persist a lot longer. Still safe ?
As for the load, it seems that if it's rated for 900w, it should be safe
indefinitely at 100w. But who knows.
The model is BN1500M2, by APC (schnider).
Peri
<< Annoyed by leaf blowers ? https://quietcleanseattle.org/ >>
------ Original Message ------
From: "jim--- via EV" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Cc: "[email protected]" <[email protected]>
Sent: 24-May-21 8:16:52 AM
Subject: Re: [EVDL] small UPS
From: "Peri Hartman via EV" <[email protected]>
The unit I bought is rated for 900w and 1500VA. The specs don't list the
Wh but, again, my guess is around 100Wh.
That seems a pretty small battery for a 1500VA UPS Very commonly those use two
7A 12V sealed Gel Cells in series.
The idea of hacking the unit and putting in a larger battery is
tempting. Theoretically, if it is rated for a 900w loiad, it seems that
100w or even 200w should be safe continuously. But who knows. And that
assumption has no relation to charging, where the charger is probably
the minimum to safely charge the existing battery.
As I said earlier, that is very similar to what I am running in my family room.
Should be fine for invert operation. The battery charger is small enough that
it will take a while for recharge. But it seems to take it just fine. You can
also diode block the battery so the UPS is not trying to change it, and run a
separate charger.
<snip>
And a 100W inverter continuous for $30. E.g.
https://www.amazon.com/Plug-Car-Power-Inverter-Continuous/dp/B00IJSBFN6/ref=sr_1_7?dchild=1&keywords=car+inverter+100+watt&qid=1621832451&sr=8-7
That shows as a modified wave shape. Not an issue with a resistive load, but
some things won't take well to the wave shape. Caution...
I don't need rapid charge, just safe charge. Here's a 20A charger, $60:
https://www.amazon.com/12V-20A-Lead-acid-Battery-Charger/dp/B01LP262I0
For a 100A battery, that is likely more charge capacity than you need -
especially with your stated non-need for rapid charge.
73
-----
Jim Walls - K6CCC
[email protected]
_______________________________________________
Address messages to [email protected]
No other addresses in TO and CC fields
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/
LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
_______________________________________________
Address messages to [email protected]
No other addresses in TO and CC fields
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/
LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
