calculating reg size

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BACAMICK

calculating reg size

Post by BACAMICK »

is there a simple way to calculate the size of a reg , either by the total voc or total panel output
im after 1200w of solar , 132voc all in 12v
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T1 Terry
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Re: calculating reg size

Post by T1 Terry »

if you are looking at 132v open circuit you must be planning to use them in series and a MPPT regulator. 1200w divided by 11.8v, about as far as the imagination can stretch the ability of these thing equals roughly 100 amps, good luck finding such an animal. very few MPPT controller can handle over 80voc, very few can handle more than 60 amps, possibly an Outback MX80, it will handle 150voc but only 80 amps, that would be right on the borderline of the accepted rule of thumb for MPPT controllers, 80% conversion of total input. At around $700 and the size of a desktop computer tower, I'd be seriously rethinking the series connection and MPPT scenario.

A Plasmatronics Dingo driving a solid state relay, around $360, another roughly $250 if you want to add the shunt kit so you have a battery monitor as well, it will handle 100 amps, for another $60 roughly you can upgrade it by 100 amp steps. I have up to 2kW of solar running on my house via such a system so I know it works and works well.
A person may fail many times, they only become a failure when they blame someone else John Burrows
Those who struggle to become a leader, rarely know a clear direction forward for anyone but themselves
BACAMICK

Re: calculating reg size

Post by BACAMICK »

correct terry was looking at running them in series , wat u have there i was cuming up with similar figers and thought i was wrong , that outback is one murgrel :)
am i trying to over solar ?
the only way i can see it working is to break the solar down to 2x600 and run 2 regs
ive looked at 24v panels and they seem worse to set up , any ideas that u can put at me ? as im just about over reading all solar sites :) im trying to get 1000+ watts , dont no if i need it realy as im only going to have 500ah of agm , id like to be over solared than under

cheers
ps this means nothink to me lol

A Plasmatronics Dingo driving a solid state relay, around $360, another roughly $250 if you want to add the shunt kit so you have a battery monitor as well, it will handle 100 amps, for another $60 roughly you can upgrade it by 100 amp steps. I have up to 2kW of solar running on my house via such a system so I know it works and works well.
BACAMICK

Re: calculating reg size

Post by BACAMICK »

terry now ya got me reading the dingo site :)))))))))))))))))))))))))
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Re: calculating reg size

Post by T1 Terry »

There is a PDF on the Plasmatronics site FAQ, Expanding the Dingo's capacity, that explains about driving a the solid state relay with the Dingo. It can also be done with the PL20, but the Dingo is the more modern unit with some great features that the PL20 doesn't have. One of the features i really like when using it as a battery monitor as well, it does the maths between Ah in and Ah out on the fly, so the Ah out keep reducing when the battery is charging and the Ah in reduces if the load exceeds the charging rate, a quick glace tells you whether you are ahead or behind in the battery state of charge.
We use this set up quite a bit when changing over to lithium batteries, the Dingo becomes the master controller for all charging methods, no need to get special chargers etc, the Dingo does all the control work.

T1 Terry
A person may fail many times, they only become a failure when they blame someone else John Burrows
Those who struggle to become a leader, rarely know a clear direction forward for anyone but themselves
BACAMICK

Re: calculating reg size

Post by BACAMICK »

is this what ur talking about terry ? im assuming id put 600w in one side and 600w in the other , i see they have a 40/40 avalible now

http://www.plasmatronics.com.au/downloa ... .V1.11.pdf
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Re: calculating reg size

Post by T1 Terry »

BACAMICK wrote:is this what ur talking about terry ? im assuming id put 600w in one side and 600w in the other , i see they have a 40/40 avalible now

http://www.plasmatronics.com.au/downloa ... .V1.11.pdf
You could put all 1200w on one relay if you wanted to but I'd split it across 2 relays, just easier on them and they wouldn't get as hot.
You can use this method to control your mains charger as well if you want, or a charger powered from an inverter while you are driving, it's a very versatile battery charge control system.
A person may fail many times, they only become a failure when they blame someone else John Burrows
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bellett65
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Re: calculating reg size

Post by bellett65 »

The Dingo is as Terry says very versatile. I am using one on my system. I does not however dispense the sorbent.

Peter
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