Attaching extra solar panel to batt for a bit of extra humph

[simonpickard]

Hello all,

I've got a spare 100watt panel that I was thinking of just wiring directly to the batt terminals when the charge is a little low and I want a bit of extra juice in the tank. I have 300watts on board that is wired through a controller but is there any issue in just wiring this 'temp' panel straight to the batteries if I do it sensibly and don't let it overcharge the battery?

Any ideas on this would be most welcomed.

Regards,
Simon