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
