Help a noob

[Flanders]

The lead acids in my inverter are toast. I'm hoping to be able to replace them with lithium - 2x Hubble S-120 in series is what I'd like to go with.

Unit is 24v:



If this setup is possible, how should this jumper switch be set:



Any help or pointers appreciated

 

[marbro]

As a complete noob and non sparky,

40amp should be fine, But, can the inverter safely charge lithiums?

 

[Flanders]

As a complete noob and non sparky,

40amp should be fine, But, can the inverter safely charge lithiums?

I don’t know. That’s what I was hoping some clever person here could tell me before I go blowing things up.

 

[AlphaJohn]

I don’t know. That’s what I was hoping some clever person here could tell me before I go blowing things up.

Depends if inverter fan is tied to Temp, always on or charge state.

Problem is Lithium used V is still high enough to be "seen" as full on Lead acid. So could cause inverter to stay on float but consume and heat asif proper bulk cycle. Without a fan this can cause overheating.

So If you do not have dedicated type setting for Lithium on the inverter, I would use lowest Amp setting possible.

If fan is always on or based on Temp then Hubble Lithium can use 1c (ie: 100A)

 

[Flanders]

Depends if inverter fan is tied to Temp, always on or charge state.

Problem is Lithium used V is still high enough to be "seen" as full on Lead acid. So could cause inverter to stay on float but consume and heat asif proper bulk cycle. Without a fan this can cause overheating.

So If you do not have dedicated type setting for Lithium on the inverter, I would use lowest Amp setting possible.

If fan is always on or based on Temp then Hubble Lithium can use 1c (ie: 100A)

As far as I'm aware (I'll need to pay attention now) the fan is on while running. I'm not sure whether during charge or temp.

 

[TheChamp]

As far as I'm aware (I'll need to pay attention now) the fan is on while running. I'm not sure whether during charge or temp.

What inverter is it? Is it the Mecer modified sine type?

 

[Flanders]

What inverter is it? Is it the Mecer modified sine type?

It's called Invisimo-2000 (modified sinewave)

 

[TheChamp]

It's called Invisimo-2000 (modified sinewave)

Then it's safe to assume that it's not intelligent, just stick to the lowest setting, 10A.

 

[AlphaJohn]

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www.alibaba.com

Yeah, no..... I would use 10A

As the manual says Lead acid only.

 

[Flanders]

Thanks for the input, guys.

So 10A - what does this mean in practical terms? I'm an idiot with this stuff. Obviously longer recharge time but does that mean it wouldn't get to recharge during uptime on the average schedule? ie. in theory on a 120AH battery that a full charge would take 12 hours? I'm trying to determine whether I need to now look at a new inverter before running out and blowing the 15k on batteries.

 

[AlphaJohn]

Thanks for the input, guys.

So 10A - what does this mean in practical terms? I'm an idiot with this stuff. Obviously longer recharge time but does that mean it wouldn't get to recharge during uptime on the average schedule? ie. in theory on a 120AH battery that a full charge would take 12 hours? I'm trying to determine whether I need to now look at a new inverter before running out and blowing the 15k on batteries.

Yeah charging them up back up if fully drained (Something you should not do) will take forever.
Batteries should be ok, in theory the BMS will protect them

Your inverter on the other hand might die an early death.

Edit: 3Kwh at 10A is about 12.5 hours at full rate, something you will never get as charge drop off after 80% so looking more like 16+ hours. Can always add MPPT + Solar to help with charge & use when sun is out.