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BSLBATT LiFePO4 Batteries On Boats – Marine How To

139 Published by BSLBATT Jul 08,2019

BSLBATT LiFePO4 battery

BSLBATT Lithium Batteries are designed to outperform traditional lead-acid batteries on the road, on the water or off the grid, enjoy the freedom that comes with having more usable energy in a lightweight, no maintenance package that’s safe, reliable and worry-free.

Compared to lead-acid and other lithium batteries, BSLBATT lithium ion phosphate batteries offer significant advantages, including improved discharge and charge efficiency, longer life span and the ability to deep cycle while maintaining power. BSLBATT LiFePO4 batteries often come with a higher price tag, but a much better cost over life of the product. No maintenance and super long life makes them a worthwhile investment and a smart long-term solution.

Those specialized marine LiFePO4 systems featured external Battery Management Systems (BMS) that could cut loads and/or charging devices if anything got slightly out of whack, and when you’re in the middle of an ocean that’s a pretty important feature. Most of the online offerings I came across were for auto use, where it’s assumed that if something goes wrong you can pull over to side of the road, hop out, and run away. Not so good for a yacht where the closest land may be a just mile away, but happens to be straight down, on the ocean floor.

And that’s where I left it for a few years while I concentrated on selling high quality energy-dense AGM batteries while keeping an eye on the Lithium scene for new developments. I did flaunt some ideas at boat shows, etc., to gain feedback on how boaters perceived Lithium Ion batteries, and below is a brief summary.

Reduced Weight – Not seen as a major buying point for large-scale battery banks. Many sail-boaters said they actually need the weight of batteries for ballast.

Extended Cycle-Life – Many understood the concept of the protracted cycle-life of LiFePO4, but were not willing to pay the premium for that fact alone when they would probably be selling their current boat in the near future.

More Useable Capacity – Many seemed slightly wary of being able to draw LiFePO4 batteries down to at least 80% Depth Of Discharge (DOC) on each cycle without any detriment other than slightly reduced cycle life. Most understood that drawing down lead-acid batteries lower than 50% DOD was not advisable.

High Discharge Load Capability – This feature, where the available capacity of a LiFePO4 battery is the same whether the discharge current is 1 amp or 100 amps was especially attractive to those looking at high load applications like electric propulsion.

Faster Charging – This fact seemed to be pretty well known, but many were focused on the absolute maximum charge rate possible while not considering being more conservative, both for safety’s sake and also to extend charging equipment life.

Cost – Ah yes, the cost. Actually, once all the benefits of LiFePO4 batteries were fully explained, the relatively higher initial cost of LI was typically perceived to be less of a detriment. Most respondents had not considered other associated costs such as alternator and charger upgrades, monitoring system, etc.

I’d always envisaged that eventually we would have LiFePO4 batteries in the same case sizes as lead-acid versions, and with simple, standard positive and negative terminals, just like we have all been used to for so many years. So no real surprise then that these started appearing a few years ago, but more as single-battery replacements, i.e. for auto’s, motorbikes, quad bikes, bass boats, etc. I dallied with one or two manufacturers, but never saw the safeguards or technical back-up I’d deemed a priority in being able to utilize their products in high-energy marine LI battery banks. But that was then, and this is now.

Recently I have been working with one manufacturer of BSLBATT LiFePO4 batteries that has so far ticked all the boxes on my wish list:

They have LiFePO4 products in all popular marine group sizes, with just a positive and negative terminal.

Their batteries contain an internal BMS and incorporate comprehensive safety mechanisms.

Their batteries have passed very stringent tests, where other manufacturers test the cells only.

The products are backed up with a comprehensive and worthwhile five year warranty, the first three years of which is replacement or repair free of charge.

This company fully understands the particular needs and requirements of a multi-battery marine cycling bank, and offers specific guidelines and detailed charge/discharge instructions.

Their engineers and sales persons are very knowledgeable, and quick to respond to questions and inquiries.
24v and 48v products are available, along with custom designs.

BSLBATT batteries 480×481 There remains just one very important box to tick: a monitoring and control system. But then we have that already.

The BSLBATT BMS system has components that can be configured to give all of the monitoring, safeguards, and switching functions that have been standard on the complex specialized marine LiFePO4 systems mentioned earlier. As an example, the BMS can be set up as a dual-bus system that will cut charging during over-voltage and high battery temperature conditions, and cut heavy loads in the event of low voltage or low battery capacity. This leaves the internal safeties in the batteries as final fail-safe devices.

The complete line of 12, 24 and 48 volt BSLBATT Batteries are perfect for use in RV’s, Boats, EV’s and off-grid applications and much more. The wide variety of standard and high performance BSLBATT Batteries ensure we have what you need, when you need it.

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