3 ms·
I suggest building your own UPS with strictly DC outputs. Most of what you'll be plugging in runs on DC anyway. This does mean you'll need to dig into some of y
by dreamcompiler 6y ago
I suggest building your own UPS with strictly DC outputs. Most of what you'll be plugging in runs on DC anyway. This does mean you'll need to dig into some of your equipment to find the DC access point, but on other equipment you'll only need to cut the wall wart off the end of the cord.
You can choose your own battery and battery maintenance equipment for maximum longevity, and choose your own switched power supply with different tap points for different DC voltages.
This is simpler and more reliable than AC line-interactive UPSes because synchronizing an inverter with wall-socket power is not required. Yes, you need some EE skills to build it, but the end result will be far more reliable than a cheap off-the-shelf UPS.
- zzz61831 6y agoYep, and once you start using custom DC UPSes the biggest issue will be battery chargers that kill lead-acid batteries. Things are better with LiFePO4 these days, but for lead-acid I haven't found a solution except for literally hacking a pulse charger and battery management on top of arduino.
- dreamcompiler 6y agoI've had good luck with solar charge controllers for RVs, e.g. [0]. You have to drive them with DC of course but they're designed to be driven by very poorly-regulated DC like that coming from a PV panel. So a cheap AC/DC converter (either switched or linear) driving one of these things should preserve your batteries. Most of them also provide a DC load output which gets automatically switched over to the battery if the input DC (or in the case of a UPS, the input AC) fails. [0] https://www.rvweb.net/best-solar-charge-controllers-for-rv/ https://www.rvweb.net/best-solar-charge-controllers-for-rv/