Technical Inverter alarm

[Ducatomick1988]

Just wondering if anyone has any insights on this.. my 2000w Renogy inverter starts beeping with an alarm when in use and my battery monitor gets down to 98% on my victron battery monitor.. I have two 130AH EXPEDITION PLUS Deep Cycle AGM leisure batteries. This is also the case while I’m driving, but only idling, as soon as I accelerate the alarm stops (victron Orion B2B 50amp charger)

Any help/opinions would be appreciated!

 

[the green vanper]

Hello,

What the inverter manual says about the beeping?

 

[Googlebot]

Your inverter is much too big for your batteries.

Lead acid usually work on a C10 which is you can take 10% of their capacity out at any one time. More than that risks damage to the plates and unacceptable voltage drop. Currently you are taking about 85% capacity when the inverter is on full load.

What are you running off it when the issue arises?

What size are the cables and how long is the run between the battery and the inverter?

Lithium are a much better option, they can do C100 so the same lithium capacity would easily do it. You do need probably 50mm sq cables though.

 

[the green vanper]

Lithium are a much better option

They are different types of lithium batteries, for different uses, with different parameters.

 

[Googlebot]

They are different types of lithium batteries, for different uses, with different parameters.

Generally, the only suitable ones are lithium phosphate.

You won’t find any others designed for motorhomes usually.

 

[Ducatomick1988]

Your inverter is much too big for your batteries.

Lead acid usually work on a C10 which is you can take 10% of their capacity out at any one time. More than that risks damage to the plates and unacceptable voltage drop. Currently you are taking about 85% capacity when the inverter is on full load.

What are you running off it when the issue arises?

What size are the cables and how long is the run between the battery and the inverter?

Lithium are a much better option, they can do C100 so the same lithium capacity would easily do it. You do need probably 50mm sq cables though.

Thanks for the reply!

That makes sense, not what I wanted to hear, but makes sense!

The appliance I’m running is a portable air con unit. The cable size to the inverter is 70mm sq and length is maybe half a metre.

I’ve always known lithium is the way to go but it was just a cost issue, I should have just bit the bullet and went lithium from the start!

 

[Googlebot]

Thanks for the reply!

That makes sense, not what I wanted to hear, but makes sense!

The appliance I’m running is a portable air con unit. The cable size to the inverter is 70mm sq and length is maybe half a metre.

I’ve always known lithium is the way to go but it was just a cost issue, I should have just bit the bullet and went lithium from the start!

If it helps, your AGM will be knackered in about a year anyway. Then you can fit lithium, it’s actually now much cheaper than lead acid as the prices have fell off a cliff recently. They last far longer and are maybe twice the price but last for approx 10 times the cycles.

Your cable size is adequate and the run short enough so I would double check what the beeps mean. A portable air conditioner only takes about 1000 watts usually which should just about be okay.

You have a great B2B fitted which is lithium suitable. That is probably masking the fact your batteries can’t cope hence why it stops when you rev the engine.

How old are the batteries you have?