Lithium batteries and alternator protection.
The six 6 volt lead-acid house batteries in my class A DP have gone bad. I am looking to replace them with 6 Battleborn 100Ah 12v LiFePO batteries. Eventually I will be adding solar. I am not look...
Forum Discussion
Tom/Barb wrote:You haven't been particularly forthcoming with the current/voltage at your battery/alternator, charger input, charger output, and battery terminals. Having this information clarifies exactly you're Victron is doing---no smokescreens. The hundred dollar question: is your charging current purposely limited based on the use of lower charging voltages, or is your charging current limited due to excessive voltage drop due to undersized wiring?CA Traveler wrote:You can set any parameters you like, would you operate your equipment at max capacity at times?
Tom/Barb From the Victron specs it does not have the ability to display amps. Did you determine the 20A from say a battery monitor? Then the Victron could be supplying 10A to house loads plus 20A to the battery or 30A on it's output. This is how charging systems work - amps supply house loads and what is left charges the battery.
Your 30A unit is spec'd for 30A output not input. I didn't read the manuals but wondering if it can be downgraded to 20A. The voltage can be adjusted and that could reduce the amps.
At 10% efficiency your unit would draw 33A on the input at 36A for 20%. However the unit can be wired (and should be) to sense the actual battery voltage (both batteries). That means that wiring losses are a factor and the input amps could be larger drawing more input amps but IF your wiring (size and length) is per Victrons specs then wiring losses would be limited.
Just trying to see if we can get a better understanding of your system.
Just because you can, should you?
when I installed my Victron equipment I was in contact with the Victron and set the parameters IAW direction.
and yes I have a AMP meter installed in the couch.
As for high duty cycles, we've pulled the maximum rated charge current from our 40a Renogy dc to dc charger for up to 3-4 hours at a time, at least 50 times over the last year, with zero issues. Renogy is far from an upper-tier product like Victron. I would suspect you'd have zero issues doing the same with your Victron.
