...MPPT with a Renogy DCC50/30 you will reduce your choice of solar panels to those with a max 25VOC output, many 200W panels go over this VOC.
I have the Renogy DCC50S myself, with a 170W panel, the biggest I could find at the time with <25VOC. It's been big enough for us, so not an issue here.
Mine is a T5 with aircon (better alternator?) and I have the dcc50s and LB next to the rear wheel arch (LWB) just over 6.5 metres away from the SB. Seems this is too much for the voltage drop despite me only having a 1.5 metre run for the negative cable to chassis earth point underneath the LB...
...those who have shared their work & code! as a result I've cobbled together a ESP8266 & MAX 485 and used Arduino to read the registers from my DCC50S and output the variables dynamically to a webserver. It still needs plenty of work but it's mostly functional.
I have come across a few...
...Renogy Solar Suit case which I take away for if not close to an EHU.
I have a leisure battery under my passenger seat. Charging this I have a DCC50S but that is overkill for my 62Ahr AGM. A DCC30S would do, but I wanted to future proof myself.
I have an EHU which comes in next to the vehicle...
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...
I have the above equipment for sale. Recently bought to upgrade my current Sterling DC to DC charger. I have decided to ditch the upgrade project due to difficulty in running larger cables for the 50 Amp unit.
Item for sale is the same package as attachment. I am looking for £250 if collected...
- 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...
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
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...
...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.
...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...
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