First post here, hello everyone! So I've installed a Smartsolar MPPT 75/10 in my campervan and also fitted a Cyrix CT, wired with 16mm2 cable between the auxiliary and starter batteries. The load output on the MPPT runs small devices (phone charger etc). All working fine during testing.
I ran my campervan this morning with no problem. Later this afternoon I started the engine and the MPPT load output switched off almost immediately (had to disconnect everything to get it back on).
When I went out this morning the batteries would have been at around 12.5v, this afternoon they'd been charging so around 13.5v (MPPT in float mode).
I can't think why this is happening - Any ideas as to what would cause this?