WRT54G voltage/ amperage range

Discussion in 'Cisco/Linksys Wireless Routers' started by pipster55, Aug 6, 2014.

  1. pipster55

    pipster55 Serious Server Member

    I have a wrt54g with dd-wrt v24 sp2. I live off grid and power generation is currently limited and I try to minimize it's use. I am searching to find what ranges of voltage and amperage the wrt54g can handle. Read on the forum it can deal with 6 to 17 volts. Somewhere I have read that amperage draw is only what a device needs so a relatively higher amperage availability shouldn't bother.
    I have a 12v/ 5amp automotive power supply so as to go directly from DC To DC rather than DC/AC/DC which I'm thinking robs a little power in conversion. I can also bypass the inverter.
    Any insight if the wrt54g can tolerate the excess amperage? Or lesser amperage than the 1000ma supplied by the OEM supply?
  2. badassz34

    badassz34 LI Guru Member

    I had my whole home network on solar a few years ago as kind of an experiment. At the time I was using a WRT54G(S?) v7.2, but you can easily find the power adapter specs for any of them. Powering directly from the 12v deep-cycle batteries worked fine, even during the day when the batteries were charging at 14v+, but I was a bit worried about it, so I bought an AnyVolt Micro to provide a regulated supply to the router. Since moving, I have yet to put it all back on solar, but I am still running things on an parallel battery backup where a scooter charger is keeping the two batteries charged and providing operating voltage for my network cabinet. During an outage my combo dsl modem/router/ap, an old NSLU2, and a SamKnows white box keep on trucking, AS LONG AS THE DSLAM IS STILL UP. That last bit is a pain for me, as I used to have cable internet and their equipment was on backup as well, meaning that I still had internet during power outages. Not so for my local phone company's dsl equipment.

    It really will depend on your storage setup, though. If your storage array is higher than 30v the AnyVolt may not be the part for you. Check out the specs on the devices over at dimensionengineering.com . They have several DC-DC converters that may suit your needs.

    Ha, I almost completely missed the point of your query; no, the available amperage of the adapter won't hurt your router, as the router will only draw the amperage it needs. That's as long as the voltage output is the same as the router's rating. For the power specs of the various WRT54G models, have a look at https://en.wikipedia.org/wiki/Linksys_WRT54G_series
  3. pipster55

    pipster55 Serious Server Member


    Thanks for reply and the links. My setup is basically 12v. I do have one panel supplying 24v but I convert it to 12v. I have yet to check out the router with the 12v/5a adapter but it's good to know that I won't be smoking my wrt54g up. Sometimes on rainy days I want to try the adapter and bypass my inverter. It's just that I spent time flashing with dd-wrt and configuring it to work for my situation. Resetting on a new router would make for a lot of head scratching at this point.

    Gonna try 900mhz for an experiment. I am broadcasting my signal thru foliage for 400ft or so and the rain is a detriment to reception.

    Also I have read that the BEFW11s4 has a lesser power draw, probably lesser receptivity as well, but for now until I get my solar panel resituated I need to keep the power usage down.
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