Basementsaver
Backup Sump Pump
Battery Guide

Find Out Exactly How To Choose The Optimum Battery For Your
Battery Backup Sump Pump

Backup Sump Pump Guide

Reliable Basement Protection

If Your basement configuration or some other reason prevents you from installing a Water Powered Backup Pump then you should install a battery backup pump.

But Having An Unreliable Backup Is Probably Worse Than Having No Backup At All!

The Basementsaver BP-Series is a range of high quality low maintenance battery backup pumps specifically designed to give you years of reliable service:

Basementsaver BP3 Is Your Best Battery Powered Backup Option For Commercial Basements And Extremely High Sump Flow Rates!

Battery Backup Pump Sales

Starter Battery, Deep-Cycle Battery, or Dual Purpose Battery?
Standard Wet-Cell Batteries, Gel-Type Batteries, or AGM-Type Batteries?
Find out which battery type and technology You should choose to provide optimum performance from Your Battery Backup Pump!

Basementsaver battery backup pumps are sold online to people like you all over N. America who find it relatively easy to install their own basement emergency flood protection system. However, we suggest that you buy your battery locally, in order to avoid potential problems and the expense associated with shipping of such heavy articles, which also contain toxic chemicals. If you cannot buy your batteries locally, we can ship them to you, Just e-mail Tim or Call 1-866-518-2405.

If you want to ensure maximum performance from your battery backup pump, with minimum maintenance, it is important that you choose the optimum battery (or batteries) to power it. Read this battery guide to find out more!

All specifications quoted for Basementsaver battery backup pumps assume the use of Good Quality 12 Volt (12V), Group (size) 27, 'Deep Cycle' Marine Batteries, and the the backup pumps are supplied with size 27 battery boxes to house your battery (BP1 Battery Backup Pumps or BP2 Battery Backup Pumps) or pair of batteries (BP3 Battery Backup Pumps) in.

You can choose to use larger size batteries, and will gain a longer pumping time from them, however you will need to buy larger battery boxes locally in order to house them. We do not recommend the use of batteries smaller than group 27, even though they will fit into the supplied battery box(es).

The standard Automotive Lead-Acid Starter Battery, as used in your car, is NOT recommended for use with your Basementsaver battery backup pump. As with all lead-acid batteries, these starter batteries are designed with alternating positive and negative lead plates separated by an insulator.

Automotive starter batteries are specifically configured with many thin lead plates to provide a large surface area that can deliver large amounts of current for a short period of time (typically about 5 seconds) before being recharged from the cars alternator. This battery type cannot tolerate the deep discharge that is associated with providing power over extended time intervals (several hours) - as may be required of battery backup pumps.

If you do use an automotive starter battery with your battery backup pump you will most certainly experience only a limited lifespan before needing to replace the battery. Worse still, as the battery degrades prematurely, you will also experience diminished pumping time - which could result in a flooded basement.

Compared to an automotive starter battery, the 'Deep Cycle' Marine Battery is designed with thicker plates that are alloyed with a high antimony content. This design difference allows 'deep cycle' batteries to tolerate deep discharge, with full recovery upon recharging, and still provide acceptable lifetime before requiring replacement. Deep cycle batteries typically provide much greater storage capacity than starter batteries, making them useful in boating applications (hence the name 'marine' deep cycle batteries) as well as in battery backup pump applications.

Do not confuse 'Deep Cycle' marine batteries with 'Dual Purpose' marine batteries. A 'Dual Purpose' battery represents a compromise in design between the starter battery and the deep cycle battery. Although dual purpose batteries can give excellent performance in many applications, We Specifically Recommend The Use Of 'Deep Cycle' Batteries With Your Basementsaver Battery Backup Pump.

For optimum backup pump operation we are mostly concerned with providing sufficient power for the longest possible period. This requires the maximum possible 'Battery Capacity' - which is usually specified in terms of Amp-hours (Ah) and Reserve Minutes:

To ensure reliable performance with minimum maintenance, your battery backup pump should ideally use a quality 12V battery with excellent Cycle Life rating. Battery cycle life is assessed by continuously cycling (fully discharging to 10.5V and then fully recharging) under controlled conditions until the battery fails to hold 50% of its' initial rated capacity. The higher the cycle life the longer the battery will last before you need to replace it. Properly charged and maintained, a high quality deep cycle lead-acid battery will typically provide hundreds of discharge cycles, which should give you several years of reliable service.

So far we've been considering lead-acid 'deep cycle' batteries, but other 'deep cycle' battery technologies are also available and you're bound to come across them when shopping at your local boat chandlers or marina store:

Compared to a Lead-Acid Battery, a Gel Battery or an AGM Battery is less liable to break when subjected to shock and vibration, and will not leak electrolyte,. These advantages are undoubtedly useful in boating applications, but are probably not worth the extra cost when used in most basement backup pump applications, where the battery will be sitting in an immobile battery box on the basement floor.

You can increase the emergency pumping time available from your battery backup pump by adding an extra battery (BCC Extra Battery Box & Cables are available here), which should be wired in parallel with the first battery. However, you should always:

Buy a Group 27, 12V 'Deep Cycle' battery with the maximum Ah, Reserve Minute and Cycle Life specifications. Lead-Acid Deep Cycle Batteries will perform well and probably represent the maximum value for money in battery backup pump application, although there is some minor maintenance required in 'topping up' with distilled water. If you do not trust yourself to perform this maintenance, consider a Gel or AGM battery.

The Basementsaver BP-Series is a set of 3 powerful high quality battery powered backup sump pumps specifically designed for emergency basement pumping.

The BP1 unit is submersible, whereas the BP2 and BP3 'Out-Of-Sump' units are designed for efficient pumping even when space in your existing sump pit is limited. All 3 units come with everything you'll need - just buy a high quality deep cycle marine battery locally, follow the included easy-installation instructions, and plug the charger into a nearby 120V GFCI outlet. If you don't have them, you'll also need a small can each of PVC Cleaner and PVC Cement.

The Basementsaver BP, Battery Backup Sump Pumps, the Basementsaver WP, Water Powered Sump Pumps, and the Basementsaver HP Water Powered pumps are all excellent emergency backup sump pumps. Find out how to choose the best backup sump pump technology to protect Your specific basement and it's valuable contents.

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