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UPS charging and output of sl waber 550 unit, manual or info

Looking for manual, drawings of the sl waber 550 UPS. Battery output charging capacity, would like to increase total run time of the UPS, but not overload the charging capacity of the UPS. Looking for current specs on the charge side (rectifier) of the circuit, plan on using approx 1A on the AC (output)for my equipment

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Find the manufactor and go to there site for drawing/schemmatic.

Posted on Aug 20, 2009


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Tripp-lite Internet Office UPI 350U series has red light flashing by "Overload/Check Battery." What should I do. Thanks

The power rating of the equipment that is plugged into the battery-supported outlets must not exceed the UPS capacity. To make sure it doesn't, add together the power rating for each piece of equipment and compare the total requirements to the capacity of the unit, which is listed a) on the bottom of the UPS, or b) on the Specification tab on Tripp Lite's product page. If the total power draw of the connected equipment exceeds the capacity of the UPS, the load MUST be reduced for the UPS to perform properly.

If this is NOT the case, disconnect the unit from the wall outlet and check the battery voltage- it may be at its end-of-life cycle. It may not be holding the charge or not take a charge anymore.

Feb 12, 2017 | Internet Computers & Internet

1 Answer

Charging light flashes quickly between green and yellow. Normal?

No. Most UPS's should have a Solid Green Led on if the unit is running good. This might be indication that UPS has batteries that are not charging completely which mean they are depleting. How old is this UPS and the batteries? Have you changed the batteries yet? Need more info. Do you still have the manual. Always keep UPS manual handy. I have a ton of manuals but not for these little UPS. Mine are for 10kVA to 1000kVA 480v to 208v. Anyways hope I helped.

Dec 21, 2013 | Hi-Capacity Zoeller 510-0005 Basement...

1 Answer

I have a very old SL Waber PowerHouse 250 that I brought out of storage. I bought an after-market battery. After plugging it all back together, and plugging it in, I find that the LED does not light. No...

Sounds more like a problem in the UPS than the battery. If you don't have a voltmeter or a friend who has one (should read 12 volts), try connecting the battery to a 12v car light globe (brake or turn indicator globe). The globe should glow brightly and get warm. If so, the battery is fine.

Jun 05, 2011 | Computers & Internet

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I have model G1010USB battery backup and it has been plugged in for more than 48 hours and the battery capacity has never changed and showed it the battery is charged up or not it, the boxes just stay...

Is this unit new or used? Either way, the first thing to check is if the battery is plugged in. UPS units are shipped with one of the battery leads disconnected for safety purposes. Please remove the front plastic bezel and verify the battery is plugged in. If it is new, and you followed the instructions correctly, you could have a bad battery or charging unit in the UPS. Please contact technical support for the manufacturer.

If you have a used UPS, disconnect the battery connections and use a multimeter to check for existing voltage on the battery. If it is completely dead after a charge cycle, it is quite possible the battery is bad and needs replacement.

Mar 05, 2011 | Tripp Lite HT1000UPS (037332125262) UPS...

1 Answer

Computer restarts as soon as power goes off, its not an ups . When i manually turn off the power to the UPS, it switches / relay works fine, but if actually if there is a power outage the relay does not...

Your question is slightly confusing. Do you mean that the computer is not powered by a UPS? If the computer is not connected to the UPS, then why have a UPS? If the computer is not connected to the UPS and restarts when you turn the UPS On, your circuit feeding the UPS is overloaded and the voltage dips. If the computer is connected to the UPS, and restarts when there is a power outage, the fault may lie in the reaction of the HP 800. This unit looks to be a line interactive unit and it is not a true on-line UPS. The line interactive and battery backup (no voltage regulation) units both should have a switch to battery power time of 4 msecs, or less. If this unit is faulty and the switchover time is longer, it will not continue to hold up the computer internal power supply. If you are trying to run a laser printer on the HP unit, it won't have enough output capacity.

Feb 20, 2011 | HP Computers & Internet

2 Answers

I cant charge mine. it keeps making a beep

Two possibilities come to mind. 1) The battery has failed and can't be charged fully (usually one cell fails and it won't charge fully). I've diagnosed this by removing the battery and trying to charge it with a variable power supply. You can try replacing the battery.
2) The UPS itself is faulty and can't charge/maintain the battery. The entire unit should be replaced.

I recommend solution 2. I had the 725VA in this consumer UPS line and when I replaced the battery, the UPS could not keep the battery charged with any load on the unit.

Check your warranty, though. The APC warranty is for 2 years on this model.

I hope this helps.

Cindy Wells

Jun 02, 2010 | APC Back-UPS ES 350 - UPS ( external ) -...

2 Answers


waheed70, NO!!!! NO!!! NO!!! DO NOT EVEN THINK OF DOING THAT!!! You may cause catastrophic failure to not one but both APC ups units and will void any warranty you might have!!! If you are in need of longer run time on battery back-up, then start looking into buying an "ONLINE" ups system somewhere in the 5 to 10 kva range. Check out "chloride" systems and "powervar" and "toshiba" and "ONEAC" for info about "true online" battery back-up systems. Bye for now. 12fixlouie

May 02, 2010 | APC Smart-UPS 1000VA UPS System

3 Answers

My ups is switching off itself immediately the mains goes off.the battery is okay with 13v.

Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and enviromental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only a float voltage and a true indication of the battery voltage needs the batteries to be tested under a load. there maybe one battery that is faulty and causing the whole battery system to fail.
These lower powered and cheaper KVA type UPS are switch over types (when the mains fail, the UPS switches over to the inverter in milli-seconds to supply mains power). It is a possibility the inverter circuit is faulty and when the mains power fails the inverter does not switch over.

The true UPS type are usually the higher KVA units (over 1500 KVA units) that converts mains power continuously via the inverter circuit. The mains power charges the batteries and the inverter drawing power from continuously from the batteries (therefore there is no switch over time lag from the mains to the battery.

Sep 25, 2009 | MGE Pulsar Ellipse 800 (89363) UPS System

1 Answer

APC 280 UPS problem. No A/C output when power interupted. Battery charges OK.

Have you load tested the batteries? DCV is not a good enough test for the batteries, they could still open right up under load. If the UPS is over 3 years old, I'd swap the batteries. Your power is drawing solely from the batteries on AC line loss, so if the UPS is failing when that occurs, almost certainly is the batteries.


2 Answers

Modem jacks do not work

Sounds that way to me as well. Call Waber and talk to tech support.

Oct 14, 2006 | Sl Waber PowerHouse UPS System

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