Question 1

Can the D+ ignition cable be connected directly to the positive terminal of a 12V battery instead of an alternator?

Accepted Answer

In our setup, we have connected the D+ ignition cable to the 12V battery (positive terminal) directly (it is connected to the positive charging cable, which is connected to the 12V battery positive terminal). But, it is important that the connection between the D+ port and the 12V battery has an on/off switch in it, so that charging is only initiated once the engine is running (otherwise you will completely run down your car/RV battery in no time).

In summary,

(i) have a lead from the D+ ignition port in the DC-to-DC charger to a simple on/off switch,
(ii) have a lead from the on/off switch to the positive terminal of the 12V battery (e.g. connect this lead to the positive charging cable); fuse this lead if you think necessary,
(iii) connect the positive charging cable to the 12V battery (which will simultaneously connect the D+ lead) and the negative cable to the negative terminal
(iv) turn on the engine (and thereby, the alternator)
(v) switch the D+ ignition lead switch to ON (green light on DC-to-DC charger should show, indicating charging is underway)

When the charging session is finished, just reverse the above steps.

Question 2

Is this charger suitable for a hybrid vehicle charging 2 caravan batteries?

Accepted Answer

There should be no reason why you can't. I would download the manual from renogy as this will give you a better idea. You will have to feed from your car battery and also feed a d+ from your ignition or alternator to the charger. Hope this helps.

Question 3

will this unit work for a smart alternator which run at a lower voltage

Accepted Answer

Specify what a "low" voltage...

Question 4

Does this come with a warranty

Accepted Answer

Euro zone to euro zone 6 years (seriously, check for yourself) outside EU is 12months I believe.

ASIN	B08Z3QRZVV
Battery Charge Time	3 Hours
Best Sellers Rank	3,391 in Automotive ( See Top 100 in Automotive ) 40 in Car Battery Charging Units
Brand Name	Renogy
Colour	Black
Compatible Devices	RVs, Commercial Vehicles, Boats, Yachts
Country of Origin	China
Current Rating	60 Amps
Customer Reviews	3.7 3.7 out of 5 stars (37)
Global Trade Identification Number	00810009718697
Input Voltage	12 Volts
Item Dimensions D x W x H	31D x 6.8W x 17H centimetres
Item Weight	2.81 Kilograms
Manufacturer	Renogy
Manufacturer Part Number	RNG-DCC1212-60-UK
Model Number	RNG-DCC1212-60
Number of Items	1
Output Voltage	12 Volts
Product Warranty	2-year material and workmanship warranty
Specification Met	CE

Renogy 12V 60A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium Batteries, Using Multi-stage Charging in RVs, Commercial Vehicles, Boats, Yachts

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