I've been looking at a lot of LiFePO4 batteries. I found one manufacturer who makes a 100Ah 3.2V battery with a weight of 2.0kg. That's 8kg for 100Ah 12V. Most others are around 12kg for the complete battery. Victron's batteries seem a lot heavier than most of the others. If we compare the 9.6kg Voltax battery against the 12kg average, then it weighs as much as an average 80Ah unit.

Here is a Tesla Powerwall:

https://www.tesla.com/sites/default/files/pdfs/powerwall/Powerwall%202_AC_Datasheet_en_AU.pdf

Total Energy - 14kWh

Weight - 114kg

A 12.8V 100Ah Tesla equivalent battery would weigh 10.4kg.

114 kg / (14 kWh / 12.8V / 100 Ah) = 10.4kg

Before you buy any battery get its specifications. This is for my 4 batteries in parallel for my fridge.

Whenarewethere wrote:

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The batteries inside the Victron looks a bit like a Winston.

http://en.winston-battery.com/index.php/products/power-battery

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Winston's product range appear to be all Lithium-Ion chemistries with a charging voltage of 4V or 16V. I don't see any LiFePO4 batteries.

Edit:

Datasheet with specs and dimensions for several Winston batteries:

https://www.swiss-green.ch/9043500_datasheet_FR.pdf

Strangely, there is no mention of LiFePO4 in Winston's datasheet. However, the model names would imply that the chemistry is indeed LiFePO4, eg LFP260AHA. The older product marking is LYP260AHA (what does "Y" mean?)

The max and min limits are 2.5V and 4.0V. Nominal voltage is 3.2V.

The LFP400AHA (3.2V 400Ah) battery weighs 13.7kg, so that would also be the weight of a 12.8V 100Ah battery. That seems to tally with Victron's specs.

It seems very strange that the manufacturer would omit the cell chemistry from the datasheet.

Edit #2:

"Y" = yttrium

"LYP" models are LiFeYPO4 cells:

https://www.ev-power.eu/docs/pdf/Winston-InternalResistance.pdf

"Winston LiFeYPO4 Battery"

"LiFeYPO4 Battery is created by Winston Chung, Founder of Thunder Sky Winston Battery Limited located in Shenzhen, China.
its  full name is rare earth yttrium lithium battery."

"Winston LiFeYPO4 Battery is a kind of high power lithium ion battery and its different with the traditional lithium ion battery and lithium iron phosphate battery. Winston LiFeYPO4 Battery has much better performance on high rate discharge and performance on low and high temperate. the range of working temperate is from -45C to 85C. and the cycle life is as much as 7000 times at 70% DOD."

Why would a manufacturer underplay yttrium?

https://en.wikipedia.org/wiki/Yttrium#Precautions

"Yttrium currently has no known biological role, and it can be highly toxic to humans, animals and plants."

"Exposure to yttrium compounds in humans may cause lung disease."

Jaahn wrote:

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Hi Dorian :)
Here is an Australian manufacturer of assembled batteries. They just sent me a flyer as I have bought from them in the past. Not cheap but they do offer 10years guarantee and an Australian base ! They have their specs available. I will put up their technical information page for some general information.
www.lfp.net.au/technical
Jaahn

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 Hi Jaahn, Is the wording correct, perhaps if they are importing Chinese parts, manufactured in China it should read Chinese manufactured and assembled in Australia.

The 10 year warranty is only if you spend  a minimum of $4390.00 on a new battery. The every day Nomad batteries have the usual poor 3 year did I say poor warranty.

Thanks for the link.

Chris.

This is a good video 12m26s, you can whip through parts quicker, but, there is some good explanation & testing of one cell on a testing device icharger X6.

Is was noted that only one cell was tested, nevertheless it had a disappointing capacity. A reasonable BMS but it was covered so cooling is not good.

A bit of insight for us novices to arm ourselves!

https://m.youtube.com/watch?v=68ypBszeEPs