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Basement Watchdog Emergency Backup Sump Pump (1000 GPH @ 10') & Battery

Basement Watchdog Sump Pumps and Accessories
(Based on expert analysis, manufacturer ratings and customer reviews)
3.3 out of 53.3 out of 53.3 out of 53.3 out of 53.3 out of 5
3 Reviews
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Back-up Sump Pumps
Switch Type
Vertical Float Switch
Complete Solution
Basement Watchdog Emergency Backup Sump Pump
Basement Watchdog Battery and Battery Acid
Provides up to 12 hours of continuous power

Protect Your Basement from Flooding
Automatically starts when your existing sump pump fails
Senses power outages

Exclusive Monitoring System
Controller monitors power conditions and battery life
Sounds alarm during failure or required maintenance

Backup Sump Pump
Empties the sump pit after a malfunction, outage or excess water
Pumps 2000 gallons-per-hour @ 0’ lift (or 1000 GPH @ 10’ lift)
Switches to 12-volt DC battery power when AC power fails

0.4-Amp Battery Charger
Recharges battery when power is restored

Dual Float Switch
Added redundancy for protection and piece of mind

12 Volt DC
Battery Included
Housing Material
Float Type
Vertical Float
GPH @ 0 feet
GPH @ 10 feet
Battery Recharger
1.6 Amps
100 Pounds
Product Width
4 3/4" Inches
Product Height
6.5" Inches
w/elbow . .61⁄2 H x 81⁄2” W
Consumer Warranty
2 Years
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*Ask Jim about the Basement Watchdog SPD-BWEKIT. Sorry, no repair questions:




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  5 Questions
Q: do you sell ac adapters for watchdog sump pumps BWE model. Adapter Model DC230400?
by Lorraine S from Ohio on January 20, 2014

A: I'm sorry to say that we do not offer any separate components from any battery backup systems. You might try calling Basement Watchdog tech support at 800-991-0466 for further assistance.
by Jim, Product Expert
Q: I'm considering the Basement Watchdog SPD-BDKIT for $675. I see what appears to be the same pump (BWD12120C), without battery, for $479. So I figure the battery and acid must be about $200. I see the battery (30HDC140S) for $140 and the same battery with acid (SPD-WDBATTERYACID) for $250. Does that mean you're charging $110 for the acid? In one of the Q&A's, you say auto parts stores should have the acid for about $20. OK, what am I missing?
by Darrell Courtley from New Jersey on March 01, 2012

A: Everything that you see is true. Due to the corrosive and hazardous nature of shipping the acid, the cost is elevated. We sell the kit as convenience to those customers that want everything delivered to their door at the same time and we also offer the other options for those that don't mind making a separate trip for the acid to save a few dollars. And yes, most auto parts and big box stores should have the acid available for about $20. You do want to look for 1.265 specific gravity battery acid and it will come in a 6 quart box.
by Jim, Product Expert
Q: If the backup pump is activated due to heavy water flow (to help the main pump) and the AC power stays on, will the system keep charging the battery to allow the backup pump to keep running indefinitely?
by Scott Mueller from Connecticut on January 24, 2012

A: Yes, the controller will keep the battery charging and the pump running indefinitely if needed. This is true for the Basement Watchdog model BWE and the BWSP stand alone battery backup systems as well.
by Jim, Product Expert
Q: Do I need to leave my battery backup system charging at all times?
by Patrick Mcclone from Wisconsin on January 03, 2011

A: To be completely sure your backup system is fully functional during a power outage or weather event, these systems need to stay plugged in at all times.

by Jim, Product Expert
Q: If I buy a Basement Watchdog pump do I need a Basement Watchdog battery?
by Karen from Illinois on January 03, 2011

A: You can use any deep cycle marine battery, as long as it is not maintenance-free. However, there are several advantages to using a Basement Watchdog battery. The Watchdog battery accommodates the system’s fluid sensor which will sound an alarm when the battery needs water…a very important feature, since a dry battery will not perform. In addition, Basement Watchdog batteries run longer per charge, and last years longer. A typical marine battery will last 2-4 years, while the Watchdog battery will last approximately 5-7 years. Basement Watchdog batteries are shipped dry (without acid) so they stay fresh on the shelf indefinitely, while wet batteries have a short shelf life.

Update 11/16/15: Basement Watchdog has changed this requirement around 2013 and their backup systems will now accept maintenance free batteries. Please refer to their updated installation manual for instructions on the proper method for this battery installation.

by Jim, Product Expert
Basement Watchdog SPD-BWEKIT Reviews & Ratings
3 Reviews  Sort by 
New Rochelle, NY
Total Helpful Votes
14 Helpful Votes
2 out of 52 out of 52 out of 52 out of 52 out of 5
Serious Flaw
The system is designed to be used with a 12V "deep discharge" battery, different from a car battery becomes unusable after being completely discharged a few dozen times. The battery which comes with the pump has to be filled with acid and topped off periodically. The acid is hard to handle, it gives off fumes while one fills the battery, and each cell has to be filled to precisely the right level which is hard because the acid is completely transparent.

I live in an area where... more
Manufacturer Response
Brand Rep
We are sorry that you are not satisfied with the Battery. Just to clarify, this unit is designed to work with a 12 Volt Deep Cycle Marine battery. We decided to design it this way since car batteries are meant to give off a quick surge of energy to start a vehicle, unlike marine batteries that are meant to be charged and discharged often and maintain healthy life cycle. When the system alarms bad battery it does not always mean that the battery needs to be replaced or that it will only run the pump for a short period of time, but there could also be other factors; such as corrosion to the terminals or loose connections. It sounds like you got a pretty good life span out of the battery with 5 years. Please contact us directly if you have further questions or need assistance at 800-991-0466 Ext.3
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Kezia R.p.
Baltimore, MD
Purchased from Sump Pumps Direct
Purchased 6/1/15
5 out of 55 out of 55 out of 55 out of 55 out of 5
Is This A Good Buy?
It's legit, took about an hour and some change to assemble and when tested it sucked up everything in the well like a good sump pump should.
Kezia Recommends This Basement Watchdog Product
Manufacturer Response
Brand Rep
Thank you for your review! We appreciate your consideration of our products and willingness to share that with others.
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Chuck S.
Dundee, MI
3 out of 53 out of 53 out of 53 out of 53 out of 5
Short Battery Life
I purchased this model Watchdog less than two years ago, and the battery has two dead cells. Seems like it should last longer. My car batteries usually last 4 to 5 years....
Chuck Does Not Recommend This Product
Manufacturer Response
Brand Rep
Sorry to hear that battery didn't last you as long as it should have. Typically these batteries should last an average of 5-7 years overall. Even though the battery is out of warranty we should be able to help you out in some way. I would suggest calling our service team at 800-991-0466 option 3 and let us know that the battery has gone bad early.

Kind regards,
Glentronics Customer Support
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