MPPSolar - PCM5048 - Time to come out.. :-(

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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby davidg » Sat Aug 31, 2013 1:17 pm

Gordon-Loomberah wrote:Batteries that last a long time due to correct charging voltage, or cooked batteries...I'd say the one that does the job properly is more than twice as good ;)

Seconded :!: ask "Jimbo", he got a Midnite Classic 150 not long ago, I think he's been pretty happy with it.

I recently confirmed that you can "overdrive" (within reason) them with more solar panels than there rated they simply move the optimum "knee" point of the array voltage up if there is too much power being produced and it cannot use it all, they are very smart for a DC MPPT charge controller.

That's pretty much the same way SMA, Kaco and a few other GCI's would do if you did the same thing to them.
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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby offgridQLD » Sat Aug 31, 2013 1:45 pm

I have spotted that a few times on my classic 150.

All I usually see is the screen on the local app turns orange/yellow and it said over current. Usually when there is a few clouds around and the edge effect its trying to push 5000w from a 3960w array. I think it limits output to around 90A or so.

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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby davidg » Sat Aug 31, 2013 2:00 pm

offgridQLD wrote:my classic 150 ...... the screen on the local app turns orange/yellow ...over current ....... its trying to push 5000w from a 3960w array ......... it limits output to around 90A or so


Yep, thats it, basicly slides the voltage point on the input "up" until it only puts out what it's supposed / designed to, which is why it's so important to ensure that the array does not exceed the peak / maximum voltage allowing for coldest temp where they are installed.

Even with SMA if you exceed the peak voltage rating, then thats the end of your warranty with them, they log it internally and it cannot be erased from them, no matter what an installer thinks, you can reset everything else under certain circumstances, not things that void warranty.
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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby Quokka2 » Sat Aug 31, 2013 3:00 pm

I guess the feature of the PCM5048 that appeals to me is the programmable relay switches that enable you to control things other than just battery charging (in my case, mains backup load switching or battery charging). If the owners of the PCM5048 only use these switches for overcoming deficiencies in the unit itself, then that defeats the object a bit.

If MPP Solar don't jump in here soon and offer any help on this, I suppose we'll all have our answer...

Gosh I'm an evangelist now - pretty silly description for a born-again sceptic... :lol:
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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby Tracker » Sat Aug 31, 2013 4:25 pm

.
The simple and bottom line is that the PCM 5048 is pretty darn good, except for what now seems a VERY SIMPLE problem.
How hard is it to STOP charging a set voltage .. :cry:

Working correctly the PCM5048 replaces the charge controller and the relay driver... another few hundred bucks worth.. :D

..
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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby offgridQLD » Sat Aug 31, 2013 4:38 pm

The simple and bottom line is that the PCM 5048 is pretty darn good, except for what now seems a VERY SIMPLE problem.
How hard is it to STOP charging a set voltage .. :cry:


Isn't that like saying my cars engine runs great but one simple issue . The oil pump randomly stops working ;)

Don't most reasonable charge controllers have the ability to drive a relay . I know the classic 150 can trigger two separate I think from memory. Its a standard feature.

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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby davidg » Sat Aug 31, 2013 4:58 pm

Quokka2 wrote:I guess the feature of the PCM5048 that appeals to me is the programmable relay switches that enable you to control things other than just battery charging

The midnite classic has an AUX relay as does the Outback Power 60 or 80. If you need more then frankly the RD-1 which is voltage based is certainly an option. If you are using more than one midnite or outback then one relay per unit, if you have a topend battery inverter such as an SP-pro (several digital controls based on all sorts of things) or Sunny Island which has an aux control as well.

I'm biased there are features in the SP-pro that are just not found in any other brand of battery based inverter on the market, and they work really, really, well. They may cost more they are worth every cent of the extra money, if your considering getting an SP-pro battery based inverter make sure the person or business actually knows the product well and will help you set it properly, or you will definately miss out on getting the most out of it as well as really cool/advanced features you can do with them or leverage to your advantage.

Such things as contolled load draw from the grid, if using the grid (time/day controllable), short term recharge from one SOC to another SOC both on and off-grid. All models are designed for both on and off-grid in the same unit (easy to go from on-grid to off-grid or the other way round), only needs changes in the programming within it, of cuorse they do comply with all Australian Standards, both on and off-grid, they have a good solid warranty. Always get your though an accreditted installer you will get an extra 2 years warranty on the unit (Seven Years typically)

Example:- Using an SP-Pro if you have or want to have a "grid-hybrid" or are going to retrofit using ANY brand of Grid Connected Inverter Based Solar system and you want the battery inverter to start recharging the batteries at night based on SOC rather than over discharging them, then using a couple of the internal controls they can setup to say at a 75% SOC allow the grid in to recharge the battery bank to 77% SOC, stop charging at that point, not allow any further charging and do this cycling. At say 23:05 allow the grid in again to recharge the battery bank at a controlled rate if desired fully recharge the batteries, allow the battery bank to sit on float until say 0400 at which time the grid will no longer be allowed in again. Drawn down from the batteries until the Solar system ramps up as the sun rises which in turn gradually supplies the loads and then as the sun improves so the amount of power increases until the whole load is taken by the Solar. Now any excess is supplied to the SP-pro to recharge the batteries. Once the batteries start reaching the controlled limits of recharge current, the SP-pro now starts exporting the excess to the grid, this continues over the day until at the end of the day when the solar slowly drops off the SP-pro gradually takes over supplying all the loads again, and so the entire process cycles through again. Should the power fail the SP-pro will continue to supply power up to the lowest SOC setting at which point it can sound an alarm, start a generator, if all else fails shutdown to protect the batteries. This is all done in the internal programming of the unit. If the Solar is running it will continue to do so regadless of the grid being present as the SP-Pro presents itself as the grid, to any Grid-connected solar Inverter / System if installed and setup correctly.

Some of the above programming for house use, there is no other battery inverter on the market that can do this type of thing, a couple of other brands go close but nothing else will do it all.

Manufactured in Australia, Program development done in Australia, Repaired in Australia, Built tough. They are worth every penny they cost, sure you pay more, at the end othe day you only get what you pay for.

Am I biased yes, why because they are a great product, if they were not I would not dribble on about them.
SMA are a great product too but they just do not some of the stuff the SP-pro's do, they do other things at this point in time that SP-pro can't do. That's really only in larger scale systems where currently Selectronic do not compete at this time, maybe later on.

Hell I sound like a flipping salesman, SORRY :( but it's really true.
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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby Tracker » Sat Aug 31, 2013 7:50 pm

.
I thought the subject of the thread was about the PCM5048 and similar..
It seems to have turned into a "Mine is bigger than yours" blog.. :oops:

Perhaps it would be good to start a few different threads on separate Charge Controllers, so that all the benefits of each can be examined.. :idea:
..
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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby offgridQLD » Sat Aug 31, 2013 8:09 pm

I would say if settings just change by themself then there is some kind of bug in the code. Convincing the makers and having them update the software would be the only way to fix it.

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Re: MPPSolar - PCM5048 - Time to come out.. :-(

Postby davidg » Sat Aug 31, 2013 8:33 pm

offgridQLD wrote:Convincing the makers and having them update the software would be the only way to fix

Yes, however have you ever tried dealing with them, I certainly can say this, lots of luck is a nice way to put it. Typically extremely unwilling to do anything at all for any reason unless it's a hardware fault, software no hope at all getting fixes typically. :cry: Might as well bang your head against a wall it's easier and less stressful. :roll:
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