What would be the problem with taking out the original batteries and hooking up 2 automotive batteries (90 amp hours)?
1404400
In both cases my units failed because of electronic component failures. These units are protected with a circuit breaker which prevents the user from pulling more than a specified number of amps through the unit. Since no schematic diagram or parts list is provided, one can only speculate what the maximum number of amps is for this particular unit. I think you idea is doable, but bear in mind that the charging circuit in the UPS is not designed to charge two large automobile batteries. I would be concerned about heat build-up and/or component failure.
1404401
I agree with the other posts . You need Deep cycle batteries but you also can find power inverted made to accomplish this task the only question being capacity wattage and if it has pure sine wave out put as long as your load isn't more than what the inver can provide and battery has enough capacity & is of correct type then you should be fine . Never however modify or tinker with UPS and modify it beyond what the design say .
1404402
vA=w(Volts)(amps)=watts. Regardless of AC or DC. And lead acid batteries work fine, just use a true deep cycle battery like a 6vdc "golf cart" type battery. These are much better than Marine deep cycle. Just make sure your input DC volts matches the units input parameters. The main issue is the battery charging. Lead acid has a different charging parameter than whatever is in this unit... sealed agm probably. Just bypass the charging circuit and add an appropriate charge controller. There are many good ones on the market.
2156264
No. I tried the same thing. But there is circuitry to prevent overcharging which would damage your batteries that is missing in the circuit.
738434
Automotive batteries are not typically rated in amp hours. I would estimate a car battery to be in the range of 60-100 amp hours depending on its size. Car batteries are designed to be starting batteries; not deep cycle batteries. It is important not to confuse volts, amps, amp hours. Your battery is 12 volts as well has the heater. When connected and turned on it will draw current of approximately 25 amps to generate the 300 watts of heat. On a larger 100 amp hour battery it will drain it roughly 50% in 2 hours (25 amp x 2 hours = 50 amp hours).
1772118
Well if the batteries are fresh, and installed correctly (correct polarity), the problem must be the unit itself. The unit's microprocessor might have a problem.
244283
I wouldn't. Most people suggest using a direct connection to the battery with a relay even for just one since the current draw can blow the fuse on your factory wiring. With 2 you will definitely exceed the amperage rating and will need to wire them directly to the battery. If this sounds scary, it isn't. The wiring kit they sell on here comes with everything you need and works well. I have 2 on my Harley using their Kit.
1610376
Hobbyking.com 2 6s lithium batteries wired in series for 48v but i run 2 8s bateries and i run 35mph+
116896
leave them connected unless you feel there is a short, something drawing current, in the system. in older vehicles where there are no clocks or electronics you can remove the negative cable and put a 12 volt, pull fues test lamp with one lead on the negative battery post and the other on the cable , if it lights something is on, pull fuses until the light goes out
119934
You need to disconnect the old battery from the leads and connect the new item using the old wiring. Please let me know if there is anything else we can assist you with.
595950
Wouldn't hurt a thing. Battery fuses are rated for much higher current. The charger would have a different (Lower) current rating.
907811
I haven't and don't recommend that either. Save yourself the hassle and be on the safe side. It is better to charge each battery separately.
1683073
I had mine plugged in for a week and I never had any issues, but my truck has two batteries as well.
1458371
I can't recommend it at this point. I installed one two months ago (and the installation was relatively easy), but last week the car started acting up electronically again (had to jump it off a couple of times, strange beeps after turning it off, ...). So this time we took it to the local dealer, their diagnostics said the battery was bad, they replaced it, and so far we haven't had any more problems. Stay tuned though, because it wouldn't surprise me if somehow the recharge circuitry is screwed up, and this hasn't been a 12 volt battery issue after all.
669113
I had no problems at all; pull the leads off the old battery, remove it and put in the new battery, and the leads went right on. No drama :)
782774
No sweat...most important step that most people skip is hook up to battery with no less than #4 welding cable. # 2 is what i used and never had an issue powering anything. If you cheat on this, it will kick out on you constantly. Auto parts store will have dual batt terminals for a few bucks for hook up. Sweet unit...:)
2176199
Several possibilities for the problem. Use quality batteries such as Duricell and be sure to buy from a supplier with a high turn-over. Be very sure that the battery's are fresh. Even a dead battery will measure 1.5 volts but it will not be able to deliver the required current. When operating with low voltage, contact resistance is always a problem. To minimize this resistance issue, always spin the battery's after installation, this polishes the contacts. There is always the possibility that the unit is defective. I have not had any problems with my unit..............hope this helps.............Bill
2191303
You can hook up as many batteries to it as you want man just make sure its 12 volt series. Like I have 4 batteries I took off of oil pumps and I connected them in a parallell series. Like I went to auto zone to get the wires to hook it up from one battery to another and then from the battery to the power inverter but I only used one positive and one negative bolted on to the inverter I didnt use all 4 and let me tell ya haha this thing powers my while cabin like a champ! I think I might have misunderstood your question but ive got mine all hooked up and stuff so I can help. carson.ross83@gmail.com You can hook up as many batteries to it as you want man just make sure its 12 volt series. Like I have 4 batteries I took off of oil pumps and I connected them in a parallell series. Like I went to auto zone to get the wires to hook it up from one battery to another and then from the battery to the power inverter but I only used one positive and one negative bolted on to the inverter I didnt use all 4 and let me tell ya haha this thing powers my while cabin like a champ! I think I might have misunderstood your question but ive got mine all hooked up and stuff so I can help.... » Read More You can hook up as many batteries to it as you want man just make sure its 12 volt series. Like I have 4 batteries I took off of oil pumps and I connected them in a parallell series. Like I went to auto zone to get the wires to hook it up from one battery to another and then from the battery to the power inverter but I only used one positive and one negative bolted on to the inverter I didnt use all 4 and let me tell ya haha this thing powers my while cabin like a champ! I think I might have misunderstood your question but ive got mine all hooked up and stuff so I can help. carson.ross83@gmail.com « Show Less
184167
Extremely unlikely. Even if the batteries fitted (they are usually specifically shaped with connectors that only fit the correct appliance) the higher voltage would, unless specifically compensated for by the drive circuits, drive excessive current through the motor leading to overspeed and/or rapid burnout.