How much battery power for High current Camera setups
Posted 24 March 2012 - 03:37 PM
High power draw on cameras and Li-ion, Dionic 90/HC batteries,
I have been dealing with a lot of battery life issues lately and find that the base cause
Is the high power consumption with the newer digital camera configurations.
Alexa: 83-90 watts camera only
Red One/MX: 75/80 watts camera only
Red Epic/ Scarlet 60 watts
Sony Cine Alta F35-F23/SRW9000 56 watts/57 watts
Phantom Miro M310 65 watts
Panasonic HPX 3700/2000 42/43 watts
Now add a monitor between 18 to 28 watts
Wireless transmitter: 28-36 watts
Follow focus (drive when operating) 28-36 watts
Zoom lens servo drive: 4-12 WATTS
Total power requirement can top out at over 130 watts for a complete rig setup.
A recent system quoted to me: Red MX fully rigged totaled out at 148 watts total power draw.
Standard usage for all batteries is 50%-60% of rated capacity for long life, constant use at
Full/maximum capacity drastically reduces the life expectancy for example
A Dionic 90 will handle up to 50 watts, exceeding this will shorten the life drastically (overheating becomes a major issue).
How does one handle these scenario’s? Even 2 Dionic 90 in series or parallel would be stressed
How many of you come across a scenario like this?
Posted 24 March 2012 - 04:19 PM
Posted 24 March 2012 - 05:16 PM
Posted 24 March 2012 - 05:34 PM
I have a second battery plate underneath so I just use their batteries (red brick v-locks) which are rated to 136w, so two of those are more than enough to power camera, camwave and a preston.
With the Red Epic, I just use an on-board rail mounted v-lock as without it the length of the cameras mass is not ideal in my opinion and it behaves better with the extra weight.
Panasonic/Sony 500/700 etc all those broadcast cameras are low enough current draw that I find two of my pag batteries underneath are more than capable of powering the camera and accessories, although those cameras are also light enough that I often just leave them with a v-lock battery attached to minimize downtime.
It's rare that I do that much work with those cameras though, for me it's mostly Red One/MX, Red Epic and Sony F3.
With my Rig when not running on Red MX I have a set of PAG 95 watt batteries, they seem to do the job and last ok.
Haven't worked with the Phantom or the F35 yet and finally getting round to my first Alexa job in 2 weeks, so i'll let you know how that goes!
Edited by James Davis, 24 March 2012 - 05:35 PM.