Comments welcome.

[AndyLes]

Thinking solar as we are spending longer at rallies with no EHU. I accept it is probably more for piece of mind than need.
So trying to keep it simple, 160 W mono panel to Schaudt LRM1218 as a direct connection into the existing Electroblock 251 / two 92 A AGMs.

 

[Two on Tour]

I think you will struggle unless you are very frugal with your power usage.

We run 250 watts of solar through a Victron MPPT solar charger into 240Ah of wet battery capacity and that holds up fine in the months with longer days, but in February this year with sunny days, we were getting to 73% capacity after 3 days and nights.
Just in the process of changing the batteries over to 240Ah of Lithium to stretch out our off grid time.

 

[TheTwoOfUs]

Has the 251 got a setting for AGM batteries? If not you may not have the necessary voltage to fully charge the batteries.

 

[AndyLes]

Yes the 251 is switched for AGMs

 

[autorouter]

If your batteries normally last for 2 days that means you use about 45 Ah per day (two 92Ah batteries discharged to 50% is about 90 Ah). On a good long sunny day your 160watt panel will yield about 70Ah.

It will yield more than your target of 45 Ah quite a lot of the summer, and part of spring and autumn as well.

As a bonus, it will keep the starter battery topped up as well. Some EBLs don't have a connection from solar to starter battery, but the EBL251 has the connection.

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[AndyLes]

Thanks autorouter for confirming my thoughts.