zsuzsiestekergo
New member
Dear Experts,
I would like to have advice on my possible dual battery set up for my expedition Toyota LC HZJ 75.
What I expect from the solution
- a dual battery system entirely under bonnet where I have around 70 cm of space for batteries.
- any of the 2 batteries should start the car if the other is ruined
- should cope with daily consumption between 40Ah and 60Ah.
- replacement should be possible, so generic solutions preferred
I have an OEM alternator (55A) and planning to complement the system with a ~130watt Solar Cell fixed to top.
I see two main options:
Option A
2 identical dual purpose AGMs, 80Ah each (e.g. Varta or Exide) + Low voltage protection.
Would still require a regulator for the Solar Panel and a smart charger.
This is very simple, gives enough capacity, but the permanent connection makes it somewhat risky.
Option B
AGM starting battery + a deep cycle AGM of 115/91ah (Varta LAD115).
CTEK D250S would serve as Solar Panel regulator, smart charger and isolator.
This gives proper isolation, but requires more conciousness on consumption.
Questions:
1. Which setup is recommended? I like B more but A seems superior.
2. This is quite an expensive set up, how could I make it cheaper without making it worse?
3. What other brands/types of batteries accessible in Europe could I consider?
For Option B
3. Running with the CTEK D250S, do I need a Smartpass or anything to regulate the charging from the alternator to preserve the good conditions of the AGM?
4. Do I need an AGM as starter at all?
Thanks for any comments and suggestions.
Csaba
I would like to have advice on my possible dual battery set up for my expedition Toyota LC HZJ 75.
What I expect from the solution
- a dual battery system entirely under bonnet where I have around 70 cm of space for batteries.
- any of the 2 batteries should start the car if the other is ruined
- should cope with daily consumption between 40Ah and 60Ah.
- replacement should be possible, so generic solutions preferred
I have an OEM alternator (55A) and planning to complement the system with a ~130watt Solar Cell fixed to top.
I see two main options:
Option A
2 identical dual purpose AGMs, 80Ah each (e.g. Varta or Exide) + Low voltage protection.
Would still require a regulator for the Solar Panel and a smart charger.
This is very simple, gives enough capacity, but the permanent connection makes it somewhat risky.
Option B
AGM starting battery + a deep cycle AGM of 115/91ah (Varta LAD115).
CTEK D250S would serve as Solar Panel regulator, smart charger and isolator.
This gives proper isolation, but requires more conciousness on consumption.
Questions:
1. Which setup is recommended? I like B more but A seems superior.
2. This is quite an expensive set up, how could I make it cheaper without making it worse?
3. What other brands/types of batteries accessible in Europe could I consider?
For Option B
3. Running with the CTEK D250S, do I need a Smartpass or anything to regulate the charging from the alternator to preserve the good conditions of the AGM?
4. Do I need an AGM as starter at all?
Thanks for any comments and suggestions.
Csaba
