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  Topic Review (Newest First)
12-02-2020 22:16
eurajohn
Quote:
Originally Posted by David Cowley View Post
Well not really, you wont travel very far, if your Motorhome engine battery is flat will you.
Not doubting that, but I still stand by my statement that the normal connection for solar power is via a controller of choice to primarily leisure batteries first with secondary to vehicle battery.

.
12-02-2020 21:14
Penquin My solar panels primarily charge the LB's then if there is excess it goes to the vehicle battery. It is controlled by a BattetyMaster circuit and in 10 years, kept off EHU, the VB has only caused a problem once when it died.

The drain on the VB primarily comes on starting, the other drains include the radio, immobiliser and alarm circuits and the clock on the dashboard. The radio has the twenty minute protection working and I have found having a 5w briefcase panel tilted and facing south on the dashboard keeps enough power going in to keep the VB fully charged. The same happened when we lived in Devon, but of course, here in Aquitaine it is more likely to have a good input.
12-02-2020 20:06
David Cowley
Quote:
Originally Posted by eurajohn View Post
Very unusual for van battery to be wired to have priority over the habs.!

.
Well not really, you wont travel very far, if your Motorhome engine battery is flat will you.
12-02-2020 17:29
eurajohn Very unusual for van battery to be wired to have priority over the habs.!

.
12-02-2020 15:15
David Cowley
Quote:
Originally Posted by 747 View Post
If I were you I would do some research into the effect of cold temperatures and charging Lithium batteries. They don't like getting cold and some users install some form of heating to take the edge off cold situations. This is not a problem if the batteries are under the seats but can be if they are in their own locker and away from a heat source.

ps, I don't have Lithium but have seen threads on other forums discussing this.
I agree you should not

fast charge Lithium batteries when below freezing conditions. My Lithium batteries are inside the Motorhome.
The solar panel gives the van battery priority, over the leisure battery's, so the chances of any charge going to the Lithium batteries would be very small, if any at all.
12-02-2020 09:29
747
Quote:
Originally Posted by David Cowley View Post
As yet I have not had a issue, when I go on a club site, mains hook up, its showing a 10 amp charge to the batteries, when they are fully charged, it drops to about 1.5 amps automatically. On the display panel it shows approx. 13.9 to 14.1 volts when charging at 10amps, drops to 13.3 volts, when fully charged, they've held 13.3volts since our last trip 10 days ago. That's as much as I can tell you at the moment.

When I first purchased the batteries, I also bought a smart charger. a NOCO GENIUS Battery charger G26000 12V/24V 26amp.
If I were you I would do some research into the effect of cold temperatures and charging Lithium batteries. They don't like getting cold and some users install some form of heating to take the edge off cold situations. This is not a problem if the batteries are under the seats but can be if they are in their own locker and away from a heat source.

ps, I don't have Lithium but have seen threads on other forums discussing this.
11-02-2020 16:00
David Cowley
Quote:
Originally Posted by pete4x4 View Post
I meant what charger are you using as there are very few chargers out there that will manage lithium batteries properly and your alternator wont do it without something else to manage the various stages of charge you need for a LiPo battery.


I want to fit two lithium batteries, I have a solar charger that fits the bill but have yet to sort out alternator and mains chargers.
As yet I have not had a issue, when I go on a club site, mains hook up, its showing a 10 amp charge to the batteries, when they are fully charged, it drops to about 1.5 amps automatically. On the display panel it shows approx. 13.9 to 14.1 volts when charging at 10amps, drops to 13.3 volts, when fully charged, they've held 13.3volts since our last trip 10 days ago. That's as much as I can tell you at the moment.

When I first purchased the batteries, I also bought a smart charger. a NOCO GENIUS Battery charger G26000 12V/24V 26amp.
11-02-2020 15:26
pete4x4 I meant what charger are you using as there are very few chargers out there that will manage lithium batteries properly and your alternator wont do it without something else to manage the various stages of charge you need for a LiPo battery.


I want to fit two lithium batteries, I have a solar charger that fits the bill but have yet to sort out alternator and mains chargers.
10-02-2020 20:25
David Cowley In the UK in the winter months, it does not matter whether you have lead acid or Lithium leisure batteries, Solar panels will not fully charge the batteries, no matter how many solar panels you have. 200amps should last us 6 or 7 days off grid, then we would go on mains hook up for a couple of days, which would more than fully charge the batteries.
10-02-2020 17:25
pete4x4 Its how your going to charge them I'm more interested in
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