How much is too much battery capacity?

[Lenny HB]

180bhp if you please the missing 20bhp from your calcs should make up for the drag on the alternator belt
But I get your point, it would take me twice as long as you to put it back
That said I didn’t notice any noticeable difference in mpg coming back from offgrid with the 2x50a B2Bs and the extra battery, it regularly returns 27mpg overall up hill and down dale, which for the size of it isn’t too bad.

Lot more than the 24.5 I get out of my little Compactline with the more efficient engine.
Are you talking actual consumption or are you believing the computer?

 

[WESTY66]

Lot more than the 24.5 I get out of my little Compactline with the more efficient engine.
Are you talking actual consumption or are you believing the computer?

The computer says 28.7 the 27.9 was from my Croatia trip a few years ago up and down the Austrian, Slovenian,Swiss and Italian alps I calculated via the fuel used, but tbh I haven’t done it since!
I do drive with an egg on the brake and accelerator tho

I do think although smaller engines are more efficient, they do have to work harder

Out of interest Lenny what was the consumption on the hymer?

 

[JockandRita]

Has anybody worked out how much diesel you use to charge the mega lithium setups. No way solar would touch the sides of some setups in the UK?

No, because I only run the engine to get from A to B.

I use the same amount that gets me to where I’m going, the solar will do the rest

Ditto Ade.

Out here in Spain, I am usually getting about 10A an hour from the winter sun on 320W of solar panels, though it did get up to 15A on Wednesday/Thursday.
It is so overcast and dull right now, I'm not even getting 1A between them yet.

Cheers,

Jock.

 

[Raul]

I currently have 2x280ah Fogstar, and I am planning adding another to make a total of 840ah, this is tied into upgrading the solar to 700w. Now my question is- do I go all out and fit a fourth, I have the room and the payload but is this being greedy to have 1120ah?? Does the extra cost outweigh the additional benefits? Any one else have 4 fitted and or have / need this capacity? My logic would be fit and forget and run what we want when we want but…??

Generally an off grid set up, properly sized, should have a min 3 day reserve without charging, supporting all the consumption out of the battery. A max Ah storage does have a limit of 5 days on lead, but no limit on lithium.
In your case will be economics and weight, that may influence your max capacity. Also consider how you going to recharge it.

 

[Lenny HB]

The computer says 28.7 the 27.9 was from my Croatia trip a few years ago up and down the Austrian, Slovenian,Swiss and Italian alps I calculated via the fuel used, but tbh I haven’t done it since!
I do drive with an egg on the brake and accelerator tho

I do think although smaller engines are more efficient, they do have to work harder

Out of interest Lenny what was the consumption on the hymer?

25 to 26mpg.

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[WESTY66]

25 to 26mpg.

So the big heavy van was better on fuel? Very interesting, then again your motor is still new