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Author Topic: crazy solar charge controller ? or genius ?  (Read 1875 times)
billi
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« on: January 12, 2011, 09:07:47 PM »

 whistlie  found this one and think its too much for my brain cells , so have to share  Shocked

crazy solar charge controller ? or genius ? or bull- sh*tfan

http://www.alternative-technology.de/Solar_Charge-Controller_30A/solar_charge-controller_30a.html



Billi

« Last Edit: January 12, 2011, 09:11:16 PM by billi » Logged

1.6 kw and 2.4 kw   PV array  , Outback MX 60 and FM80 charge controller  ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw  windturbine
EccentricAnomaly
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« Reply #1 on: January 12, 2011, 10:03:26 PM »

Sounds like an excellent idea in principle.  Not overly sure, to put it mildly, about the physical implementation.  E.g., 30 A through those screw terminal strips?
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Outtasight
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« Reply #2 on: January 13, 2011, 09:35:32 PM »

Looks ideal for controlling a remote building.  Lights, pumps, trackers, dump loads, generators, all sorts.  I should imagine there'll be more of this stuff from the arudino open source crowd.  It's just an open source microcontroller with some D/A, A/D channels, a bunch of MOSFETs on the data outputs and a load of software.  It's almost suspicious because you can do so much with it. 

I especially liked the realisation that the thing may be installed in a remote place where it might blow an output device but being entirely software driven, you can re-map a function to a spare MOSFET on a spare data output line and bypass the damage without sending the thing away for repair (or not bothering repairing it when it's out of warranty years later).

Maybe puts to shame what the big manufacturers are doing (like Morningstar and Outback).  Their controllers are also microcontroller driven, and yet they are very limited in functionality (considering their cost and the fact that you can do almost anything in software).  Although there's no reason why a lead acid charger couldn't be re-programmed to charge large NiMH or Lithium cells, how much you wanna bet they'll make you buy a new controller?  NiMH would be easy to do, as the controller already has a temperature sensor and it can measure battery Voltage, so can sense -dV/t, and has a clock to time-out charge on (the three most common interlocked end of charge methods used by NiMH / NiCad chargers).

Morningstar did provide a recent free firmware upgrade to the Sunsaver MPPT15 though, that implemented a dusk-dawn light controller program as a new function for download.  They also (after prompting from me and a few other users) added a variable current limit function in the Tristar MPPT software.  You can do a bunch of stuff with their add-on relay driver, but it's a separate box with it's own microcontroller, and expensive at that...  Very Clunky.  The controller in the Tristar has enough oomph to run a web page, so it could do tons more out of the box, with a few exposed ports and sensors.
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http://solarbodge.blogspot.com/
3.58kWp & 800Ah LiFeYPO4 off-grid(ish). See 'Cobbled together PV in W.Sussex' (in "Show Us Yours")
biff
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« Reply #3 on: January 13, 2011, 11:17:32 PM »

hi billi,
      have you any idea of the cost,?
                             biff
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