Akestor

If you are considering one part varnish, either marine with UV protection, or simple for interior areas, I would go with Vernilac...

Before installing a victron mppt, I had 2 cheap pwm from aliexpress, the classic blue plastic controller with the LCD screen. Problem is...

Probably not. If the charge current is always feeding both batteries ( very sunny day?) Otherwise if there is a heavy cloud for 15...

interesting as this is pretty much what I have done to keep batteries charged over winter: 2 small solar panels connected via Victron...

Most solar controllers will start a new charge cycle (bulk -absorption- float) each new solar day.

Ok here is what happened when turned to Both. Domestic battery was floating with the mppt solar at 13.8 and starting battery resting...

What happens when you connect jump leads from a fully charged battery, with a high output alternator running, to a car with a flat...

Probably the max of the alternator plus plenty of amps from the starting battery moving to the domestic. My battery’s data sheet...

hmmm good question. In the case of shore power I guess the charger will give its max output if needed? I have observed my 50amp...

Never seen this happen, but leaving on and draining all betteries, seen that a few times.

I was just wondering if there could be any issue at the moment of turning the switch to Both. Like if the house bank is at 13.8v and...

Answeredyour own question (y)

As we get older, such issues become more likely. :unsure:

Another option- why not just turn the 1-2 both switch to both to give some juice to the starting battery from the solar? Actually to do...

This article on the basics of how MPPT work may help: Basics of Maximum Power Point Tracking (MPPT) Solar Charge Controller "The major...