Tried my V2L Adapter today ...

[T1 Terry]

The LTO chemistry is good, but maybe better suited to heavy vehicle EV use because of their high discharge and recharge capabilities, around 10C for quality cells.
I'm trialling Sodium Ion 200ah cells at the moment, 3p4s 7.2kwh at 12v, I can't see I'd ever exceed the 7.2kw charging capability or 22kw discharging capability off grid in our motorhome .... and if the continue to work as well for the next 2 yrs as they have over the last 12 mths, I put a 10kwh@48vdc set up in the new house when it's built and use the 51kwh MG4 battery as a reserve if we get long periods of no wind and no sun, worst come to worst, we can drive the other MG4 up to the workshop and recharge it on mains power to give us a further 38kwh and still retain the 25%.

How much solar are you planning to install?

T1 Terry

 

[wattmatters]

I'm trialling Sodium Ion 200ah cells at the moment, 3p4s 7.2kwh at 12v

How does you inverter go with the wide differential between charged and discharged voltages of this chemistry?

 

[Cabansail]

@T1 Terry - I would not suggest LTO as a portable battery. The energy density is lower than other lithium cells. It is good for fixed installations where the stability and longevity make it more suitable.

When my Panels were installed there was 6kw in the array. Now that they are over 12 years old I am sure that has decreased. Panel prices have also come down. I am considering an upgrade where there should be over 12kw up there and use some of the old panels for other projects.

 

[T1 Terry]

How does you inverter go with the wide differential between charged and discharged voltages of this chemistry?

It isn't real keen on the zero voltage they can be potentially discharge down to without damage, but if I select a 10.5vdc cut off and 12.5vdc recovery, it doesn't seem to care ..... I have once pulled it down to the 10.5v cut off ..... brain hadn't kicked in that not only the inverter needed to higher fully charged voltage setting, but the solar controller did as well It was fine once that was sorted.

I only charge them to 15v at the moment, so not fully charged, 3.75v per cell, fried every voltage converter board for the fluro tube lights at 16vdc and a few of the cheap strip LED's fried their diodes and resistors and the halogen lights were blindingly bright ..... but the other 12 appliances, like the fans, rangehood extractor and water pump, worked brilliantly The 15v compromise seems to be fine, I'll eventually add a 14vdc stabiliser to the circuit .... maybe .... a lot of other things to sort first .....

T1 Terry

 

[T1 Terry]

@T1 Terry - I would not suggest LTO as a portable battery. The energy density is lower than other lithium cells. It is good for fixed installations where the stability and longevity make it more suitable.

When my Panels were installed there was 6kw in the array. Now that they are over 12 years old I am sure that has decreased. Panel prices have also come down. I am considering an upgrade where there should be over 12kw up there and use some of the old panels for other projects.

The real problem with LTO is not the energy density, so much as the not handling extreme cold, sodium ion is the opposite, it doesn't like the heat, so not a good Far Nth Qld full time living choice, LTO is the only one that really stands up well in those higher temps, but LFP do quite well ..... NMC don't like getting cold or hot

T1 Terry