victron inverter

[Paganboat]

Up until last week our victron invertor shut off when the batteries reached 11v, I was pleased as my wife thinks batteries last forever when im at work, but recently the inverter is still on powering crappy reality tv at 9volts, this has happened in the last week, instruction manual has not helped, any ideas?

[Nickhlx]

I would shut off any load and get charging to save any further damage to the battery bank and investigate tomorrow what is going on (or have it investigated)

 

Nick

[Paganboat]

Just to add, last night batteries reached 10 volts, when we switched off victron batts went up to 12v ?

[Nickhlx]

That's quite a jump, suggesting a high drain load, or worryingly high internal resistance batteries - it could also be poor connections and/or how its wired ( where the meter is measuring from)..

 

How old are the batteries in the leisure bank, and are they all the same age ?

[Loafer]

I hope they're not shafted. 9V isn't good.

[Paganboat]

I hope they're not shafted. 9V isn't good.

switch everything off they maintain 12,8,

 

switch stuff on they drop to 10ish, then switch off they go back up to 12

That's quite a jump, suggesting a high drain load, or worryingly high internal resistance batteries - it could also be poor connections and/or how its wired ( where the meter is measuring from)..

 

How old are the batteries in the leisure bank, and are they all the same age ?

year old batts, dverything seems ok, ive checked it all

[by'eck]

That's quite a jump, suggesting a high drain load, or worryingly high internal resistance batteries - it could also be poor connections and/or how its wired ( where the meter is measuring from)..

 

How old are the batteries in the leisure bank, and are they all the same age ?

 

Or seriously inadequate battery cable cross-section and/or too greater length. That would explain the recovery to closer to normal battery voltage when inverter load removed.

[Paganboat]

But its been ok for last 5 years, why now?

[by'eck]

But its been ok for last 5 years, why now?

 

When inverter is receiving only 9 volts, measure voltage at batteries - that will tell you if it's a cable or connection issue.

[Loafer]

Why would an inverter suddenly decide to let his missus watch telly at a much lower voltage than last week?

 

Did she have a word with it?

[by'eck]

Why would an inverter suddenly decide to let his missus watch telly at a much lower voltage than last week?

 

Did she have a word with it?

 

Can't answer that directly, but worth bearing in mind that an inverter is generally a constant power device - if the voltage is low the current will be higher for any given load, which will cause the volt drop on cables to be higher - something of a vicious circle.

 

This may give rise to the situation described if the light inverter load could be fulfilled even with the very low supply voltage.

Edited March 11, 2015 by by'eck