battery to inverter

[darren_374316109]

I HAVE CONNECTED A 1000 WATT INVERTER TO MY 110 AMP LEISURE BATTERY ,ON RUNNING A 60W TV THE LOW BATTERY ALARM SOUNDS THEN THE INVERTER SHUTS DOWN AFTER 22 MINS USE.IS THIS THE NORM?.I HAVE TRIED FULLY CHARGING THRE BATTERY WITH AN INTELLIGANT CHARGER AND THE SAME HAPPENS.ANY HELP WOULD BE A GOD SEND

THANKS AGAIN

 

[MARTIN_374316954]

Blimey, I had the same trouble this week end. i have bought a new 1500w surge/ 600w cont inverter. plugged in tv (50w) and after 4 mins or so alarm has gone off.

I have a horrible idea that the cheap inverters are no good. i have tried 4 different batterys.

 

[ProfJohnL]

Hello Darren and Martin,

As you correctly surmise, the inverters usually do have a low voltage warning system. In some cases it just an alarm, and other do actually prevent the inverter from working when there is insufficient voltage.

I have to agree that 22 yet alone 4 minutes seems very a short time given the condition you relate, so I wonder if there is a problem with the wiring between the battery and the inverter.

If the wiring is of to smaller size, then the heavy currents needed by the inverter will cause a voltage drop in the wire. The inverter will see this as insufficient voltage and shut down.

It is essential that you have properly rated wires between the battery and the inverter. It also helps to keep them as short as possible to minimise voltage drop.

It is actually better to have the inverter as close to the battery as possible and run out longer wires from the 230 V side as necessary.

It is exactly the same trick that CEGB use. The transmission lines are run at as high a voltage as possible, which keeps the current as low as possible and that minimises transmission losses.

Just a note Darren, it is considered bad practice to post using upper case for the whole message, it is actually more difficult to read, and some consdier it to be akin to shouting.

 

[Rod_5041370]

The larger the wattage that an inverter can deliver the higher the standing current draw from the battery with no appliance connected.

I use a 300 watt inverter to run a lcd TV and a micro stereo and this will run for hours.

I use the same inverter from a 110 A/H battery in my car to power a a 230/12 volt Waeco chest fridge as this cools far better than running from the cars 12 vdc. mainly due to voltage drop.

I regularly run this from Buckingham to Beaune in Burgundy via Eurotunnel, some 600 miles.

I also use a 2000watt inverter to run my microwave oven but this is only connected to the battery for the duration of cooking (5 to 10 minutes).

 

[MARTIN_374316954]

Hello Darren and Martin,

As you correctly surmise, the inverters usually do have a low voltage warning system. In some cases it just an alarm, and other do actually prevent the inverter from working when there is insufficient voltage.

I have to agree that 22 yet alone 4 minutes seems very a short time given the condition you relate, so I wonder if there is a problem with the wiring between the battery and the inverter.

If the wiring is of to smaller size, then the heavy currents needed by the inverter will cause a voltage drop in the wire. The inverter will see this as insufficient voltage and shut down.

It is essential that you have properly rated wires between the battery and the inverter. It also helps to keep them as short as possible to minimise voltage drop.

It is actually better to have the inverter as close to the battery as possible and run out longer wires from the 230 V side as necessary.

It is exactly the same trick that CEGB use. The transmission lines are run at as high a voltage as possible, which keeps the current as low as possible and that minimises transmission losses.

Just a note Darren, it is considered bad practice to post using upper case for the whole message, it is actually more difficult to read, and some consdier it to be akin to shouting.

In my case, my inverter is mounted in the back of my VW van on the wallpanel, precisely 300mm above the brand new leisure battery,connected via the leads supplied which as a mechanic I would say are more than ample.

I have no idea why it wont work other than it was an ebay bargain..........NOT!

martin

 

[Rod_5041370]

The larger the wattage that an inverter can deliver the higher the standing current draw from the battery with no appliance connected.

I use a 300 watt inverter to run a lcd TV and a micro stereo and this will run for hours.

I use the same inverter from a 110 A/H battery in my car to power a a 230/12 volt Waeco chest fridge as this cools far better than running from the cars 12 vdc. mainly due to voltage drop.

I regularly run this from Buckingham to Beaune in Burgundy via Eurotunnel, some 600 miles.

I also use a 2000watt inverter to run my microwave oven but this is only connected to the battery for the duration of cooking (5 to 10 minutes).

After reading John's post, I will add that the cables that I use between the battery and inverter came from heavy duty jump leads.