3 ms·

The funny thing here is that the "power station" market has this quite solved. Comes with an app minimum usually, which at least is a start for reverse engineer

The funny thing here is that the "power station" market has this quite solved. Comes with an app minimum usually, which at least is a start for reverse engineering. If you're lucky you might even get a local diag socket. Unfortunately this comes with the usual IoT issues, but at least you can watch things. With better transfer hardware youd have a much better user experience for upses. I wonder why no one has done this yet.

fy20 3y ago
Is using a power station as a UPS feasible? One of the issues I've read is that most don't have AC pass through, so it's always charging and discharging the battery. However that seems a bit odd (with my limited electronics knowledge) as batteries don't have an 'in' and 'out' port. The AC charger input, inverter and battery are all connected to the same 12V (or whatever internal voltage it uses) rail. I imagine as long as the inverter output is less than the charger input, it won't touch the battery, as the resistance will be higher.
- aunderscored 3y ago
  The one I've used (ecoflow) has a passthrough and auto transfer option. 15ms which isn't great but I've tied it up to a small online ups and had no issues. The online ups eats the transfer time and otherwise keeps the power smooth
- Libcat99 3y ago
  Even if it never touches the battery, I'd imagine there's a noticeable efficiency loss running from inverter at all times, which means higher power and cooling costs.
  - sponaugle 3y ago
    That is correct - double on-line conversion UPSs are usually in the 92-94% efficiency. Mine is almost always at 94% at 60% load. However that is the cost of on-line conversion and is well worth it.
- rainbowzootsuit 3y ago
  Think of it more that the battery sits on the side of the DC bus. Double conversation UPS are generally the highest end (rectified AC > DC > inverted AC) because there's no switching time between the inverter taking power from the DC bus being supplied by the rectifier or the battery. It is always inverting. The power quality never changes too because of the always inverting setup.

fy20 3y ago

Is using a power station as a UPS feasible? One of the issues I've read is that most don't have AC pass through, so it's always charging and discharging the battery. However that seems a bit odd (with my limited electronics knowledge) as batteries don't have an 'in' and 'out' port. The AC charger input, inverter and battery are all connected to the same 12V (or whatever internal voltage it uses) rail. I imagine as long as the inverter output is less than the charger input, it won't touch the battery, as the resistance will be higher.

aunderscored 3y ago
The one I've used (ecoflow) has a passthrough and auto transfer option. 15ms which isn't great but I've tied it up to a small online ups and had no issues. The online ups eats the transfer time and otherwise keeps the power smooth
Libcat99 3y ago
Even if it never touches the battery, I'd imagine there's a noticeable efficiency loss running from inverter at all times, which means higher power and cooling costs.
- sponaugle 3y ago
  That is correct - double on-line conversion UPSs are usually in the 92-94% efficiency. Mine is almost always at 94% at 60% load. However that is the cost of on-line conversion and is well worth it.
rainbowzootsuit 3y ago
Think of it more that the battery sits on the side of the DC bus. Double conversation UPS are generally the highest end (rectified AC > DC > inverted AC) because there's no switching time between the inverter taking power from the DC bus being supplied by the rectifier or the battery. It is always inverting. The power quality never changes too because of the always inverting setup.