Has anybody tested how long these puppies last before the batteries die?

Someone told me once but I forgot. It was well over 12 hours though. This model may last longer than the B11. http://www.bigalsonline.com/BigAlsUS...ybackupairpump

This one claims about 72 hours of battery life (two x D). http://www.seaquestmarine.com/Life_A...p/won_la50.htm

I have one of the double-D cell air pumps running my ATO and I am using the original batteries since I installed it early last summer. Typically it runs for 2 minutes every hour and certainly more on hot days. I think the 72 hour run time is probably accurate with a new set of duracell. Damn things are loud as hell though as they are piston driven and not diaphragm. :)

Ha, ha, yeah, I have the "SilentAir" B-11. It's anything but silent, however, that can be a good thing, alerts you right away when the circuit trips.

Yeah, it may not have an iphone ap, but it lets you know you have a problem :)

Go
 

Ok ordered the Slient Air B-11

Going to buy the Champion Power Generator 3000W at costco for 275 (on sale $75 off this week). I think it should be a great back up with Costco 100% satisfaction guarantee
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Granny Cam

That combination will give you more bang for the buck. Personally, I find gas generators to be overkill and impractical (noise, space, and maintenance) but at least you are covered for a longer period of time and it's there for other family emergencies and projects. You can run the air pump for the first few hours then set up the generator if it looks like a long haul. Tell your neighbours about the sale so they don't come around with an extension cord when the power goes out :)

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Thank you for all usefull advices btw
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Sc2 Replays Pro

the only way you are going to be able to power all that for an extended time is to buy a bunch of bateries and build your own back up. to run everything you listed for 1 hour you are going to need 114amps of 12V power. if you buy a good deepcell battery say 245AH then you will get a little over 2 hours out of it, so 6 of them will give you 12 hours of running. if you only use your 250 watt heater you would only need 368ah to run for 12 hours so you could get by with 2 batteries.

so you would also need a good trickel charger about 30 bucks, a 700 watt inverter about 50 bucks and some sort of change over.

a more simple way to do it would be to get a 45amp converter from a RV and set it up to charge the batteries and run thoes thing of an inverter all the time, this way when power goes out nothing changes. would probably cost about 600.00 to buy the stuff, using real good quality batteries.

Steve

just to add, you can go to batteryworld in Cowtown and get Trojan T-125's, check with a rv place for a used 45 amp converter, or new depending on the price, and then get a good pure sine wave 500watt inverter. with out your big heater your only drawing a little over 300 watts.

Steve