Multiplus 12/3000/120-12 - firmvare 260052 VE BUS
CCGX running venus 3.52 VE BUS and VE direct
BMV-712
MPPT smart 150/35 (430v solar a 24v) VEDIRECT
MPPT smart 75/15 (200v solar at 12v) VEDIRECT
Agrofet 100A
Alternator 130A
400ah lithium batteries (local non communicating BMS)
To manege the charging of the litiums I want to enable DVCC and set maximum charge to 50Amps. To my understanding the charging from Multi + MPPT + MPPT will be coordinated by the CCGX so the all will charge in sync (bulk, float…)
Also, as the 712 will provice the draw from the batteries, the charging from MPPT’s and Multi will go to 80a if there is as 30a draw from the batteries, still providing the max 50A charge
My challenge is when engine is runing feeding 100A through the Agrofet. As the alternator is not controlled by the DVCC and VE DIrect communication, ther is a risk that the batteries will be charged a more than 50a.
Is there a way to include the alternator supplied charge in the system by adding a ve direct controlled DC-DC after the agrofet? or is there other considderations i need to take?
Thanks for sharing your expertice
Kind regards
Lasse
The most important question here is why are you trying you limit the charge current to 50A? 400Ah of battery should happily charge at 200A. Do you have 4 x 100Ah batteries in parallel with the battery spec saying 50A charge rate, because if this is the case, each battery can take 50A so 4 x 50A = 200A.
The Orion XS 50A DC to DC charger would suit. It will need a lead acid battery on the alternator output / Orion XS input, I assume it feeds the starter battery so this would be OK. I do not think that the Argofet is required once the Orion XS is fitted as the Orion will only charge when the alternator is running. The Orion XS will then work as expected and can be monitored by VE Direct and controlled by DVCC.
You are right - the c rate I 0.5 so your calculations regarding chard amp at 200a is correct.
As the limit is 200a there are these scenarios as
I see it. Please correct me if I’m off.
Alternator + solar (100+65 amp =165amp)
The alternator is protected by the argofet at 100a +’65 solar amps -way below 200amps
Shorepover/multi + solar (120a + 65amp)
Still below 200a
Is it then correct that i do not need the Orion to replacing the argofet as I will loose 50a input from the alternator that could go into the batteries.
So I can leave out the alternator input in the dvcc and focus it on multi + mppt’s being in sync when charging.
