WorldWide WWLI-24V2560

The WorldWide WWLI-24V2560 battery is a 24 Volt 100Ah lithium-ion (LiFePO4) battery. This battery has a build-in heater for charging below freezing and Bluetooth. These batteries are less than 1/2 of the weight of an equivalent lead-acid battery, and they last thousands of cycles. This makes them a great alternative for lead-acid batteries in cottages and such! WorldWide is a Canadian brand, and warranty is with a Canadian company.

Also see our Finding Happiness with Lithium-Ion article, explaining the care and feeding of these batteries.

The WorldWide WWLI-24V2560 lithium-ion battery is a true deep-cycle battery, it can repeatedly be discharged a full 100% without damage. The battery has a build-in battery management system (BMS). The BMS allows them to be charged with regular solar PV charge controllers, with the same settings as for any other sealed battery (such as AGM batteries). The BMS also takes care of protecting the batteries from over- and under-charge, low Voltage disconnect, over-current, and automatic balancing of the cells.

Charge settings for Enerwatt LiFePO4 batteries:

• Bulk/absorb = 28.0 Volt (28.0 – 29.6V possible)
• Absorb time = 1 hour
• Float = 27.2V
• No equalize, or set to 28.4 Volt if it can’t be disabled
• No temperature compensation, set to 0
• A charge rate of up to 100A is possible, 30A or less is advised for longevity
• A discharge rate up to 150A continuous is possible, and 200A for 30 seconds
• This is a heated battery, charging can be done from -20C through 45C

For Bluetooth install the “Voltgo Bluetooth” App on your phone. QR codes are listed in the product images above.

These WorldWide batteries are meant for 24 Volt systems only! So no series connection, the BMS is not designed to handle over 24 Volt. They can be connected in parallel to increase the Ah rating. Parallel strings of batteries will increase the charge and discharge rates (i.e. 400A continuous current for two parallel strings etc.). Ask us if you have any questions about properly sizing a battery bank.

The recommendation is that for more than 3 batteries or strings in parallel series fusing is added to protect each string or battery. A 200 Amp series fuse for each string will do, so in case of a short-circuit in a string, and the other strings of batteries discharging into that short-circuit, it will blow the fuse. The MRBF fuse holders and fuses make a good choice for this.

WorldWide WWLI-24V2560 batteries use LiFePO4 chemistry (Lithium-Iron-Phosphate). This is very stable and is not sensitive to spontaneous combustion, in comparison to laptop and cell-phone lithium-ion batteries (which use Lithium-Cobalt-Phosphate chemistry). These are very safe batteries!

Because lithium-ion batteries can be discharged to 100% DOD, and this can be done for more cycles, a smaller battery bank can suffice vs. lead-acid. Since there is no off-gassing these batteries can be mounted indoors.

Features

• Zero maintenance!
• No memory effect
• Stores 2.5 kWh in energy!
• Compatible with standard charge controllers
• 24 Volt, 100 Amp-hour @ 10 hr discharge rate
• Only 1/2 weight of lead-acid & small footprint!
• Very low self-discharge rate, holds charge at last 1 year
• Can be mounted in any orientation, zero off-gassing, no dangerous acid
• Maximum continuous discharge current of 150 Amp, peak of 200 Amp (30 sec)
• Active cell management through included battery management system (BMS)
• Long lifespan, true deep-cycle: 2500 cycles at 100% DOD, 6000 cycles 20%-80% SOC
• 7 years warranty