Is it acceptable to use only one HVC contactor in the charge bus to interrupt all charge sources instead of placing one on each charge source? (Separate load bus) I can't imagine why I would want the HVE to only disconnect one source, and multiple contactors add failure points.
---I used one Blue Sea Solenoid for the load bus and one for the charge bus on 3 boats I installed LiFePo so far.
My house load is about 200 AH/day which means I will only need the genset every 2-3 days to charge. My question is in regards to the solar panels
charging the house bank on the non genset days...do these mini-cycles adversely affect cell life expectancy? I would hate to give up the 100 AH charge that this contributes on those days.
--- just stay away from high voltages and you are fine. There is research
showing that all electrode plating occurs at the very top end. Do not charge over 13.8V. High temperatures are bad too. Do not install in the engine
Relays are not one of my strong suits, so im looking for any recommendations on which relays to use for HVC and LVC? Can these be the same model of relay for both applications to reduce my spares requirement, or is there some difference in the application requiring different relays?
--- yes the same models for both solenoids
I am getting the impression from my various readings that cell compression is not required in this fractional C configuration, is this correct? I'm not positive that my impression is correct, so I want to double check here. I'd really be kicking myself if I destroyed these batteries through my poor interpretation of information sources.
---- The CEO of Balqon told me strapping is not required.
and commissioning, my next step will be to add to my genset charging capacity (another 75-100 amps), primarily focused at reducing my genset run time and increasing its load.
---- I guess you are planning to add another charger
to the Cristec. I installed LiFEPo recently on a friends L450. His boat
is in Grenada
. He has a generator
and uses the regular Cristec and a Victron Multi 3000 inverter/charger. He uses both for charging to load the generator better on a 1400Ah LiFEPo install. Works great.
The Cristec charger
is connected to the charge bus and will be disconnected when over 13.8 V. It continues to charge the starter batteries.
The Victron is on the load bus. We reprogrammed it to 13.8V and 13.3V for the float.
BTW the Victron is connected to the shore power
connector. This is a 220V boat from Europe
. The Cristec has been removed from the boat's power circuit and is on its own. It can be used to be plugged into any voltage and frequency in the world separately. When the Cristec is plugged into 110V shore power
then the inverter
has to drive all the 220V on board.
I have 1800W on my own L450 and do not own a generator and we use oodles of power, definitely much more than 200Ah. Wife has just started the washing
machine. Yesterday we ran the water
maker for 5 hours. We have 3 fridges, cappuccino maker, counter top ice maker, toaster, microwave. We are always good with just the solar, even in winter
in the Bahamas
. The solar install was about $3500. In the summer I could run AC (which I don't have) for the night and still have enough without a generator.
The L450 in Grenada has my previous solar install of 950W.