Do I need Lithium?

[Ray-Vic]

Lithium are too expensive, you are carrying extra weight but it's more reliable, too many horror stories with Lithium.

??

 

[SteveandSueJ]

LA batteries struggle with high loads the voltage drops significantly under high loads so if you put a big(2000w inverter on under full load likely voltage drop may cause the inverter to shut down to protect it's self) Lithium have a rated out put on a 100 ah usually 100amp so 2 in parallel 200amp with negligible voltage drop ,also LA you should only use half of its capacity 100ah rating 50ah useable,Lithium 80%Useable up.
To answer your question neither type with your inverter will run your coffee machine
Your inverter is 1000w coffee machine 1100w
The 2000w peak is usually for a second or 2
Unless it's a quality one it will struggle to deliver 1000w for extended periods.

Thank you. All makes sense.. I need a 1500/3000w pure SW inverter and lifepo4 battery, seems I will need 120amp minimum for coffee or could I get away with 100amp??

 

[Lenny HB]

Thank you. All makes sense.. I need a 1500/3000w pure SW inverter and lifepo4 battery, seems I will need 120amp minimum for coffee or could I get away with 100amp??

Not unless you buy a Super B Lithium but that will cost you nearly 2 grand.
Most 100ah Lithium have a max current discharge of 100amps, 1500 watt via an inverter would be 138 amps (125 amps + 10% for inverter efficiency).

 

[oldiesontour]

Thank you. All makes sense.. I need a 1500/3000w pure SW inverter and lifepo4 battery, seems I will need 120amp minimum for coffee or could I get away with 100amp??

3000w =250a
1500w=100a
2000w=166a
1100w=91.6a
All the above are if everything is 100%efficent
it isn't so add 10%
I would suggest cheapest practice option is
1x 200ah lipo4 and a 2000w inverter gives a good. margin on both for future proofing normally both won't be working hard .
Two 100a lipo4 would be a bit more and take more space but cover for if 1fails you have backup but as everyone says failure is rare
My suggestion is cost based you may wish to pay more per ah of lipo4 and then other ah values become available (230fogstar for instance but more costly) a 200ah is available for circa £400 or less 100ah £200 or leds

 

[SteveandSueJ]

3000w =250a
1500w=100a
2000w=166a
1100w=91.6a
All the above are if everything is 100%efficent
it isn't so add 10%
I would suggest cheapest practice option is
1x 200ah lipo4 and a 2000w inverter gives a good. margin on both for future proofing normally both won't be working hard .
Two 100a lipo4 would be a bit more and take more space but cover for if 1fails you have backup but as everyone says failure is rare
My suggestion is cost based you may wish to pay more per ah of lipo4 and then other ah values become available (230fogstar for instance but more costly) a 200ah is available for circa £400 or less 100ah £200 or leds

Excellent reply, thank you for that summary and gives me what i need. You are a star...

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[Lenny HB]

3000w =250a
1500w=100a
2000w=166a
1100w=91.6a
All the above are if everything is 100%efficent
it isn't so add 10%
I would suggest cheapest practice option is
1x 200ah lipo4 and a 2000w inverter gives a good. margin on both for future proofing normally both won't be working hard .
Two 100a lipo4 would be a bit more and take more space but cover for if 1fails you have backup but as everyone says failure is rare
My suggestion is cost based you may wish to pay more per ah of lipo4 and then other ah values become available (230fogstar for instance but more costly) a 200ah is available for circa £400 or less 100ah £200 or leds

Your 1500 watt figure is out by 25%.

 

[oldiesontour]

Your 1500 watt figure is out by 25%.

You're right 27 hour day travelling 4 hrs sleep yesterday should be 125 a (+10%)

 

[bigtwin]

Excellent reply, thank you for that summary and gives me what i need. You are a star...

In practice, due to inefficiencies, you need to add 10% to those estimates.

A quick easy calculation (that accounts for inefficiencies) is to take the (ac) Wattage figure and divide by 10 to obtain the dc current required from your batteries.

Ian

 

[Barclaybasher]

Is motorhoming a pastime or a science?

Too much technology...dpf, limp mode, adblu, sensors, b2b, electric beds, lithium........etc etc

Is it still Fun?.......

My 2001 van does me - without any of the above

 

[oldiesontour]

In practice, due to inefficiencies, you need to add 10% to those estimates.

A quick easy calculation (that accounts for inefficiencies) is to take the (ac) Wattage figure and divide by 10 to obtain the dc current required from your batteries.

Ian

Did U not read the original post ?

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[bigtwin]

Did U not read the original post ?

Yes, but I thought it worth emphasising that the figures presented were an under estimate. You knew that, and I knew that but for those who need assistance it’d be easy to take the figures at face value so gave a practical guide for anyone to be able to determine the numbers for themselves.

Ian

 

[SteveandSueJ]

Thanks everyone.. I have what I need and I hope it's been straightforward enough to be of use to others...