Information on Battery Chargers

Info on DC to DC Chargers with Single or Dual(+Solar) Input


What is the difference between regular DC to DC chargers (single input) and dual input chargers?

DC to DC chargers with a single-input, deliver current to the service battery from the start battery while driving.
DC to DC chargers with dual input has a single input + a solar input delivering current to the service battery from the solar panels.


Battery banks.
Battery banks are parallel connected batteries that you can charge with a DC/DC charger.
However, if your batteries are not connected, or have different capacities or chemistries, then you can't charge them altogether.


How to choose the amp size for a DC to DC charger?
- If you want to charge a Lead-acid battery:
use a dc-dc charger of up to 10% of the battery/bank Ah capacity.
- AGM battery: use a dc-dc charger up to 20% of the battery/bank Ah capacity. - Lithium battery: use a dc-dc charger up to 50% of the battery/bank Ah capacity.


What charge stages do these DC-DC chargers support?
Most DC to DC chargers has a 3-stage charge process: Bulk charging, Absorption charging, and Float voltage charging. The latter for maintaining a fully charged state.


What is the difference between Isolated and non-isolated chargers?
Isolated chargers use a separate NEG port and negative grounding wiring.
Non-isolated chargers connect via a mutual NEG port to the metal chassis of your vehicle. The chassis acts as the negative ground connector.


What fuses to use?
Between the start battery and the DC to DC charger should be a 60A fuse for 12V systems and a 30A fuse for 24V systems.


DC to DC Chargers with Single Input


Wiring of DC to DC charger Single Input


Victron DC to DC Charger Orion-Tr Smart 12/12-Volt 30 amp 360-Watt

Features:
- suitable for Lithium as well as Lead-acid batteries (flood, gel, AGM),
- can be used in 12V and 24V systems,
- charging to be monitored and programmed on your smartphone via the built-in Bluetooth,
- remote on/of switch.

Dimensions: 2.76 x 5.12 x 7.32 inches (70 x 130 x 186 mm)

For this Victron 12V DC to DC Charger 30 amp, see Amazon ad link here for more information, reviews, and best pricing. You will also find there Victron DC-DC chargers of 12/24V - 15A, 24/12V - 30A, and 24/24V - 17A.


Video:



Renogy DC to DC Charger 12/12-Volt 20 amp 250-Watt

Features:
- suitable for Lithium as well as Lead-acid batteries (flood, gel, AGM).

Dimensions: 2.7 x 6.9 x 8.3 inches (68 x 175 x 211 mm)

For the Renogy DC to DC Charger 12/12-Volt 20 amp 250-Watt, see Amazon ad link here for more information, reviews, and best pricing. You will also find there Renogy DC-DC chargers of 12V - 40A , and 60A.



DC to DC Chargers with Dual Input


Wiring of DC to DC charger Dual Input

Renogy dual input DC to DC Charger, 12V 30 amp, model DCC30C

Features:
- dual input: from start battery and solar panels,
- with MPPT charging technology,
- suitable for Lithium as well as Lead-acid batteries (flood, gel, AGM),
- charging to be monitored and programmed on your smartphone, using a BT-2 Bluetooth module and Renogy DC Home App.

Dimensions: 9.2 x 5.8 x 3 inches (235 x 147 x 76 mm)

This charger comes with a battery temperature sensor, IGN signal wire, RS485 communication cable.

For the Renogy DC to DC Charger with dual input, 12V 30 amp, model DCC30C, see Amazon ad link here for more information, reviews, and best pricing. You will also find there the Renogy DC-DC dual input charger of 12V - 50A, and a charger monitoring screen.



REDARC DC to DC Charger with dual input, 12V 40 amp

Dimensions: 10.24 x 4.92 x 1.89 inches (260 x 125 x 48 mm)

For the REDARC DC to DC Charger with solar input, 12V 40 amp, see Amazon ad link here for more information, reviews, and best pricing.



KISAE DC to DC Charger with dual input, 12V 50 amp, model DMT1250

Features:
- suitable for Lithium as well as Lead-acid batteries (flood, gel, AGM),
- with MPPT charging technology,
- Programmable settings.

For the KISAE DC to DC Charger with dual input, 12V 50 amp, model DMT1250, see Amazon ad link here for more information, reviews, and best pricing.