I've had good experiences with the IOTA chargers/power supplies. They're clean enough to be used directly as power supplies, but they have current limiting and thermal protection so you can hook one to a dead battery safely. You can manually adjust the voltage, and they're tough as nails.
Greg On Mar 10, 2010, at 4:32 PM, Scott Reed wrote: > I use Meanwell AD series power supplies. They hold the battery float > voltage correctly and provide (adjustable) 24VDC to the device. > > jp wrote: >> On Wed, Mar 10, 2010 at 11:26:17AM -0600, Scott Piehn wrote: >> >>> We a looking to setup a couple of our sites to run directly from DC power. >>> AC comes in, convert to DC >>> At this point, plan is to have a 24v setup of deep cycle batteries. >>> Use a packetflux to monitor the battery voltage level >>> Use a digital logger DIN relay for remote reboot. >>> Use the PacWireless DC POE injectors for 12 - 48 volt output >>> >>> What I am totally not sure on is the charging/power piece. >>> The initial site is going to have >>> Canopy CMM micro with 1 powered port >>> 8 Mikotik routerboards, >>> switch >>> >>> ?should I run things directly from the battery, or how should it be powered >>> ?what kind of charger should I get >>> Scott Piehn >>> >> >> The Mikrotiks handle up to 24v, but the charging float voltage is higher >> than they like, so you'll need a DC-DC converter for them. They are >> cheap and plentiful for a 24v-12v dc-dc converter. >> >> You can get a 24vdc switching power supply (or two) from Jameco, Ebay, >> etc.. and adjust the voltage set screw to the recommended float voltage >> for your batteries (probably in the 27-28v range). Too low, and you >> won't fully charge them, too high and you'll boil them away over time. >> >> The power supplies should provide power for the load and excess power >> for charging. Thus you'll have to figure out your load before you get a >> power supply (or just go for something grossly in excess of your needs) >> So if you have 240w load, you'll need 10A for the load and extra for >> charging and expansion, so a 20A (~~ 500w) power supply might be good. >> >> Use heavy duty wiring between the batteries and charger, etc.. for >> minimal voltage drop. A fuse panel like used in boats or traditional >> autos would be fine for the charging and loads fuses. For larger fuse >> needs, there are lots of excellent car audio system fuses and fuse >> blocks available. >> >> >> > > -- > Scott Reed > Sr. Systems Engineer > GAB Midwest > 1-800-363-1544 x4000 > Cell: 260-273-7239 > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
