Just fitted Schaudt B2B charger

[dpsuk999]

So I spent yesterday fitting the Schaudt WA121525 B2B charger and tested it this morning and very pleased with it. There are 2 versions, 25amp and 40amp and I went with the 25amp version as that suited my requirements.

It was very simple to install, and can be connected via the Schaudt EBL but because I’m using it to charge my inverter bank of lithium batteries which are completely separate from the habitation bank I kept it separate from the EBL.

I ran 16mm2 (but the manual says you can use 10mm2) from the starter battery to the inverter bank which is situated in the garage via the B2B which I decided to fit under the drivers seat where the habitation batteries are. 40amp fuses in both the + wires of the starter and inverter bank.

I bought a new MNL 4 pin connector and tapped into pin 4 of BL12 on the EBL to give me the D+ signal to activate the B2B only when the engine is running.

I ran my lithium’s down to around 79% and then started the engine and was very happy to see approx 24-25amps going in:

and battery voltage of 13.48:

So all in all very happy

 

[Jim]

Any idea what your alternator was putting in before you fitted the B2B?

 

[Pausim]

Presumably that is the lithium resting voltage. I would be interested to know what the charging and float voltages were for the Schaudt b2b when set to lithium. Thanks.

 

[dpsuk999]

Any idea what your alternator was putting in before you fitted the B2B?

Nothing as the inverter bank is completely separate and was only charged either by the Victron Multiplus Inverter/Charger when on EHU or via solar. Only the starter and hab banks are charged via alternator when driving and I’ve only ever seen a max of approx 18amp.

 

[dpsuk999]

Presumably that is the lithium resting voltage. I would be interested to know what the charging and float voltages were for the Schaudt b2b when set to lithium. Thanks.

When I ran them down to approx 79% the resting voltage was still 13.19v. I only ran the engine for approx 2 mins at the most to make sure all was working ok and the voltage rose slightly and got to 13.48 when the picture was taken. The specification of the Schaudt WA121525 says charging voltage for lithiums is 14.5v but I guess I didn’t run the engine for long enough to see it rise that high.

^{_{Subscribers  do not see these advertisements}}

 

[dpsuk999]

Victron advises between 14.2 and 14.5 charge voltage for their lithium’s which is what I have installed so the Schaudt 14.5v for the lithium setting should be ok