I highly recommend option 3, I have that one installed as above and haven't had any problems so far with heat @ 50 amps.
However the big plus for me is that it back charges the starter battery from solar if the leisure battery is full. It's a real simple and easy way to keep both batteries...
- NEW VERSION -
Renogy combined unit (all in one) 50A DC-DC & Solar MPPT & Starter trickle charge from solar
they do a 30A version too.
DCC50S 12V 50A DC-DC ON-BOARD BATTERY CHARGER WITH MPPT(NEW VERSION)...
this is true for the DCC50s as it has a built in MPPT.
BUT,
as soon as you connect a panel to it, its splits into 25A (alternator) / 25A (solar) - even with 1w of solar
and with two 100ah Lithium's you would need that full 50A . . .
so it makes sense to run a separate 20A MPPT in this...
ok so all checked as per the above and still reading 14.7v via the BT-2 monitor, but measuring 11.2v at the output terminal of the DCC50S. I've even taken the whole rig out of the van and hooked it up in the house and I get the same readings.
...update....Battery is now on the charger and...
Got the Renogy DCC50S here and does a good job of combining the alternator and solar feeds although both inputs at the same time does limit the current to 25A from each source at the same time meaning the solar rarely getting near 25A will leave the output short of 50A.
Putting an isolator onto...
I fitted one of these units last week, the blurb states that it prioritises PV when both PV and the alternator are running. I've attached a picture of my install for size
...so basically what you would use in an house to isolate a cooker or small electric shower.
I put a 30A fuse at the seat battery end just before the feed goes into the DCC50S with the neutral cable going into a neutral busbar along with all the other neutrals before the shunt then leisure battery.
...and unused Renogy Bluetooth battery charger. Came as part of a kit but is not needed. Brand new in box
£200 collection from Manchester or plus postage.
https://uk.renogy.com/products.php?product=DCC50S-12V-50A-DC%252dDC-On%252dBoard-Battery-Charger-with-MPPT%28New-Version%29&showHidden=true
...all types . .
with SLA battery's its used for charge temp coefficient ( ups the voltage when cold)
and with Lifepo4 its used to LOW TEMP charge blocking. ( incase you have a battery who BMS doesnt have that feature)
re...
...initial charge in the Roamer seatbase battery subsequently all charging has been from driving or driving and solar or solar only.The Renogy DCC50S providing 25A and the solar bunging in anything up to 16A with the solar on at the same time while driving or 50A driving with the solar turned...
Thanks @Dellmassive - no, the battery type is set with the DCC50S but there’s no way the monitor can receive that info from the DCC50S as the monitor is connected only to the shunt. You must be right because the ‘usable’ changes from one battery to another and either the YouTube users are using...
Hey guys, nice work done. I didnt see a link for the arduino code for interfacing the DCC50s, does anybody have that or can that be emailed? [email protected] Thanks in advance!
I use the SB50 grey Anderson connectors, on the Renogy dcc50s charger.
Not sure on the max cable size as it depends on the supplier as some have larger openings.
You can use thicker cable for a longer run, then use a midi fuse connector to change cable gauge for the last bit .
You removed the split charge relay completely, right? If so then yeah that ground wire is surplus to requirements.
Mine was removed completely along with the ground stud under the seat and the std ground stud to battery wire.
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