Navitron Renewable Energy and Sustainability Forum

Energy/Electricity Storage and Use/Grid Connection => Off-Grid, Batteries & Inverters => Topic started by: Mike McMillan on November 17, 2017, 04:26:14 PM



Title: Price of marine lithium batteries
Post by: Mike McMillan on November 17, 2017, 04:26:14 PM
I keep hoping the price of the marine lithium batteries will start to drop. At the moment, to purchase a 45 KWH marine bank is around 45,000 plus specialist charger and other safeguards. A 40 KWH pack for the Zoe is around 5000..Huge difference! I wonder if it's not worth dismantling the Zoe pack and rebuliding it in a marine box, with zoe charger!

Mike

Off grid Osborne Bay


Title: Re: Price of marine lithium batteries
Post by: Fionn on November 17, 2017, 04:59:18 PM
I wonder if it's not worth dismantling the Zoe pack and rebuliding it in a marine box, with zoe charger!
This is the way to go.

I've picked up 16kWh of lightly used EV lithiums for well under 2k recently


Title: Re: Price of marine lithium batteries
Post by: camillitech on November 17, 2017, 06:15:51 PM
I keep hoping the price of the marine lithium batteries will start to drop. At the moment, to purchase a 45 KWH marine bank is around 45,000 plus specialist charger and other safeguards. A 40 KWH pack for the Zoe is around 5000..Huge difference! I wonder if it's not worth dismantling the Zoe pack and rebuliding it in a marine box, with zoe charger!

Mike

Off grid Osborne Bay

What exactly is a 'marine' battery ? I have always wondered, it's a term that gets used a lot but as far as I can tell means nothing other than the excuse to charge people more money.


Title: Re: Price of marine lithium batteries
Post by: Tinbum on November 17, 2017, 07:23:20 PM
What exactly is a 'marine' battery ?

Approved by Lloyds?  ???


Title: Re: Price of marine lithium batteries
Post by: M on November 18, 2017, 09:19:54 AM
I keep hoping the price of the marine lithium batteries will start to drop. At the moment, to purchase a 45 KWH marine bank is around 45,000 plus specialist charger and other safeguards. A 40 KWH pack for the Zoe is around 5000..Huge difference! I wonder if it's not worth dismantling the Zoe pack and rebuliding it in a marine box, with zoe charger!

Mike

Off grid Osborne Bay

What exactly is a 'marine' battery ? I have always wondered, it's a term that gets used a lot but as far as I can tell means nothing other than the excuse to charge people more money.

Thanks, I was too embarrassed to ask.


Title: Re: Price of marine lithium batteries
Post by: Mike McMillan on November 18, 2017, 12:19:35 PM
Correct!! Anything marine usually attaches a hefty premium! However, when it comes down to it, whether it's electronics or just about anything else, it is subject to salt air and water, massively corrosive. One cannot afford to have breakdowns at sea either, so kit has to be ofthe highest quality. As an example, Victron use all "new" components in their equipment and as such, we very rarely let down by their chargers and inverters, normally just needing a clean of the cooling fan. On Eleonora (45 M classic sailing yacht), we have two 35 kwh generators and  40 a kwh battery bank with three multi plus's managing the single phase side of the power requirements. The 24v battery bank is used to power the deck winches for hoisting and trimming sails, etc. There is sufficient power to run the vessel "dead ship", ie without generators over night, as long as there is no A/C or cooking! Being a commercial vessel (we charter) means conforming to maritime rules and regulations, which means the batteries and installation would have to be approved by their surveyor. For non commercial yachts, then there is nothing to stop anyone doing what they want, but at the back of your mind is failure of systems at sea and worse, fire.

Down here, on shore and off grid, it makes complete sense to start using recycled vehicle batteries, and I can't wait to double my capacity ( 150 ampere hours of Rolls at the moment).

Mike


Title: Re: Price of marine lithium batteries
Post by: camillitech on November 18, 2017, 12:29:27 PM
I keep hoping the price of the marine lithium batteries will start to drop. At the moment, to purchase a 45 KWH marine bank is around 45,000 plus specialist charger and other safeguards. A 40 KWH pack for the Zoe is around 5000..Huge difference! I wonder if it's not worth dismantling the Zoe pack and rebuliding it in a marine box, with zoe charger!

Mike

Off grid Osborne Bay

''Tis just a marketing ploy to fleece yachtsmen M. As most of us know on here, there are two types of battery. Ones that have oomph and deliver lots of CCA (SLI) and ones that do not but can deliver smaller currents for longer periods i.e. Deep Cycle. The so called "marine" is supposed to both but in reality does neither as good as a dedicated SLI or Deep Cycle. Any mariner worth his salt would always have a dedicated starter bank anyway so a battery that can allegedly do both your hotel loads and starting is pointless. Nothing but a con really. As for Lloyds approval, yes there is a list but I doubt that the majority of ones advertised as marine are on it, certainly not a Nissan pack for sure.

What exactly is a 'marine' battery ? I have always wondered, it's a term that gets used a lot but as far as I can tell means nothing other than the excuse to charge people more money.

Thanks, I was too embarrassed to ask.


Title: Re: Price of marine lithium batteries
Post by: billi on November 18, 2017, 01:03:06 PM
.... I guess we need to know the life cycles that a ev car can deliver ,  as far as I know ( hope it improved )  they have  do not   do an impressive number of deep cycles .... and that cycle number compariment  between batteries is essential in my eyes 
Billi


Title: Re: Price of marine lithium batteries
Post by: camillitech on November 18, 2017, 02:32:18 PM
Despite working on a ferry powered by a .6mWh LiFePO4 battery bank, deep cycle FLA's would be my choice for a displacement craft. Keep em low down and the extra weight is a great advantage.


Title: Re: Price of marine lithium batteries
Post by: M on November 19, 2017, 07:46:33 AM
Despite working on a ferry powered by a .6mWh LiFePO4 battery bank, deep cycle FLA's would be my choice for a displacement craft. Keep em low down and the extra weight is a great advantage.

Now you're just talking ballast!  ;D

Thanks for the explanation.


Title: Re: Price of marine lithium batteries
Post by: Mike McMillan on November 19, 2017, 08:23:12 AM
We have them down low, under the floors (as you say, good for ballast). Unfortunately, someone left a valve open in the machine room and the alarm was off.......agm batteries do not like salt water!


Title: Re: Price of marine lithium batteries
Post by: camillitech on November 19, 2017, 09:30:06 AM
We have them down low, under the floors (as you say, good for ballast). Unfortunately, someone left a valve open in the machine room and the alarm was off.......agm batteries do not like salt water!

Aye Mike, the submariners worst nightmare, chlorine gas!!!