One thing to think about when designing a UPS solution (constant on type) is that your AC->DC supply must be able to carry your max load + the max charge load. Think about instances where you’re running on batteries for a sufficient period that your charge current drain may be equal to your actual steady-state load.
-- John Fraizer LinkedIn profile: http://www.linkedin.com/in/johnfraizer/ On Tue, Apr 8, 2025 at 2:29 PM Dylan Ambauen via NANOG < [email protected]> wrote: > On Tue, Apr 8, 2025 at 6:06 AM Dave Phelps via NANOG < > [email protected]> > wrote: > > > If you don't mind building you own UPS from COTS parts, you may want to > > look at Xantrex (https://xantrex.com/). I have one of their UPS units > (the > > FREEDOM XC PRO 2000) in an RV with 2 100AH LiFePo4 batteries in parallel. > > > > Yes, an integrated (inverter + charger + power supply) connected to > batteries is the simplest, most compact, plug and play. > Another example product: > > https://www.aimscorp.net/product/2000-watt-pure-sine-inverter-charger-24-volt/ > Options exist to additionally combine solar MPPT inputs. > Sealed Lead Acid AGM 12v 100Ah batteries still work, I don't rule them out. > > If you can avoid converting to AC, then you avoid the inefficiency of an > inverter running with undersized loads. You need an integrated (charger + > power supply), Iota is very good. > > https://www.iotaengineering.com/products/dls-power-converters-battery-chargers > Call Iota and speak with an engineer to correctly size the > charger/batteries and 12/24/48v, I learned a lot in 5 minutes. > A power supply+charger can charge the battery all the way up, drop to a > maintenance voltage, and still source all the current to feed your gear > without overcharging the battery, similar to an alternator in a car. The > power supply must have capacity to source enough current at maintenance > voltage. > > A device like this can replace AC power supplies for ATX boards: > https://www.mini-box.com/DC-DC > Here is an excellent 1 port POE Injector with 12v UPS, connect a battery of > your choice and enjoy: https://mikrotik.com/product/mups > Consider using a battery balancer for arrays with many batteries. > https://www.victronenergy.com/batteries/battery-balancer > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/[email protected]/message/7P2SJFSALFQ6RCUT3VUPS5NCHB66BZPQ/ _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/DFY5ARTKHDFWEBAZFQC3QVL3CBJKQV6B/
