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[Taxi_Driver]

I think I would be a tad concerned about how hot your loft gets in summertime.

I know mine gets a hot as a sauna if we get a few weeks of hot temps.....not sure a battery would appreciate those sort of temps 

[Gaffers]

I think I would be a tad concerned about how hot your loft gets in summertime.

I know mine gets a hot as a sauna if we get a few weeks of hot temps.....not sure a battery would appreciate those sort of temps 

I too have misgivings about that.  It gets to about 40C in the height of summer up there which is about as hot as a yacht will in direct sun down below.  So not utterly convinced it is an issue although I will continue to investigate.

Just noticed the sun was out so I took a reading off a panel that I could disconnect and got 20.2v and 1A

I know that is peak but still, not bad for a panel slightly bigger than a sheet of A4.

[Marks DTM Calib]

Elevated temperature does two things for lead acid batteries:

1) Shortens life
2) Increases capacity

An engine bay can get to silly high temperatures, way beyond 40 degC

[Gaffers]

Elevated temperature does two things for lead acid batteries:

1) Shortens life
2) Increases capacity

An engine bay can get to silly high temperatures, way beyond 40 degC

These are AGM

[The Sheriff]

Can't yer just get some fickin Duracell like the rest of us?

[Marks DTM Calib]

Elevated temperature does two things for lead acid batteries:

1) Shortens life
2) Increases capacity

An engine bay can get to silly high temperatures, way beyond 40 degC

These are AGM

Makes pretty much no difference, that just describes the glass mat between the plates so as to minimise acid content.