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PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 12:43
by solamahn
Just connected a 4048 to AC in and 4 x 12v250 AGM's. Batt voltage was 51.5 and went into bulk mode up to around 57v, then current started to reduce which would be absorption mode and then went into float. This did not take long because the batteries were quite full at the start. So it looks like the 50v setting of 2424 and 2448 does not apply to 4048. Also inverter does not need to be on for battery charging, either ac or solar.

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 12:51
by solamahn
Just boiled the jug to get the battery voltage down and note that fans run when the load is connected and stop when the load is removed.

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 13:32
by solamahn
Just did a better charging test starting at 51v. Battery charge current gradually increased to the 30A current limit. Then voltage gradually increased to the value in 26, 57v. Then current gradually decreased to 10A and then switched to float. Not sure if the switch to float is time dependent. As it happened right at 10A, I am thinking that the switch over is current dependent. I will try changing prog 11 to 20A to see what happens

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 14:00
by offgridQLD
Fans are triggered by load. As you noticed any load over a few hundred watts and the fans come on.

The charge profile is described in the manual along with a tiny little graph with some text that's almost imposable to read.

the graph and text show. Time at absorb voltage = time to reach absorb (Min 15min max 8hrs)... from memory.

Though I don't see it following this as it doesn't spend 15min at absorb voltage if you (re bulk a all ready full battery) it more or less just returns to float within a min or two.

So it acts like I would want it to but not how it's listed in the manual.

Kurt

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 14:23
by solamahn
Yes. Charges just how it should.

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 14:46
by offgridQLD
This is the charge profile graph from the user manual enlarged to read the super small text.

So min 10min for the absorb stage and max 8hrs (though it doesn't actually do a 10min minimum) I'm not sure about the 8hr max in absorb max. Considering the 10 min min doesn't apply then who knows how it bases how long it will spend in absorb?

It might still be determined by how long it takes to get to absorb voltage just the min and max times stated in the graph below from the manual are not enforced?

Image

Kurt

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 14:52
by coulomb
As a point of interest, what firmware version are you guys using? Have you done the firmware upgrade mentioned in Adverse Effect's post?

You can tell your software versions from WatchPower; in the lower left quadrant, there is Main CPU version (actually main firmware version, for the main controller, which has the inverter and AC charger), and the Secondary CPU version (which I assume is for the SCC (Solar Charge Controller, the MPPT charger).

I'm playing with one that has main version 52.02, but the update would bring it to 52.30. It's not clear to me how to decide if it's safe to apply the update; they say in the readme file:
"please DO NOT update if your unit is manufactured prior to 2014 as otherwise may cause inverter to work incorrectly". How do you know when it was manufactured?

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 15:03
by solamahn
You can read the manufacture month and year on the right hand side of the inverter on the sticker placed over one of the cover screws.

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 15:10
by offgridQLD
I just checked using Watchpower. I am running main CPU version 52.25

I haven't upgraded anything just what it came with.

Nothing is showing up in the Secondary CPU version. Im assuming this is because I don't have any PV connected so the MPPT charge controller has no power to communicate the info.

Kurt

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 15:51
by weber
coulomb wrote:You can tell your software versions from WatchPower; in the lower left quadrant, there is Main CPU version (actually main firmware version, for the main controller, which has the inverter and AC charger), and the Secondary CPU version (which I assume is for the SCC (Solar Charge Controller, the MPPT charger).
You don't need WatchPower. The last two display settings of the LCD, that you cycle through with the up/down buttons, as shown on page 23 of the manual, show "U1" and "U2", and give these two version numbers. There's an implied decimal point between the two pairs of digits.

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 16:24
by solamahn
The one I am using now is 52.25

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 23:10
by PlanB
I've got a couple of these boxes here in parallel. At the mo the batteries are on light charge (1A each so around 100w total) and the inverters are idling into a 60w globe, the LCD shows battery on charge & mains bypassed to the load too). The load sharing seems to hunt badly, every time I query it I get a different output power but lets say ~100w.
But when I put a clamp meter around the mains input the pair are pulling 4.7A! So 200w for the load & the batteries but 1200w from the mains. 500w/box overhead seems a bit steep!?

PIP-4048MS inverter

Posted: Tue, 23 Jun 2015, 23:34
by solamahn
Set 19 to FEP, 20 to LON and then have both screens display load in watts. Each inverter should hunt a bit. One will go up while the other goes down and vice versa. Then read your battery current with your clamp.

PIP-4048MS inverter

Posted: Wed, 24 Jun 2015, 17:08
by PlanB
Confirming my results this morning for the 2 boxes in parallel;
AC mains current in the pair 4.8A at 251v = 1205w
AC inverter current to the 60w lamp 0.24 at 251v = 60w
DC current charging the battery 2.1A at 54v = 113w
So in round numbers 200w out, 1200w in so about 500w/box lost in overheads.
Maybe a lot of the inefficiency is happening in the charger? When I cycle through the display screens, one of them reports 1-2A AC on each box for battery current. If, by AC, they mean mains current then that's 250-500w AC in for 54-108w DC of actual charging.

PIP-4048MS inverter

Posted: Wed, 24 Jun 2015, 17:25
by offgridQLD
That has to be a big error in your metering. There is no way you are loosing 500w ! to heat in each PIP. If you were you would be able to cook sosages on the thing.

I have used my PIP to charge battery's from AC and power a load at the same time for several hrs on end and it's not even warm.

Let me conduct the same test and I will get back to you with the numbers .

Kurt

PIP-4048MS inverter

Posted: Wed, 24 Jun 2015, 17:32
by weber
PlanB, you're only measuring AC current. You have no idea of its phase or harmonic relationship to the AC voltage and hence its power factor. All you can say is that it's 1205 VA. You don't know how many watts. You need a true power meter. You could use the one in your meter box. If you turn off everything else in the place you could time how long between LED pulses or disk rotations and calculate the power.



There follows a long off-topic discussion on Power Meters. You can skip it by clicking this link.
viewtopic.php?title=pip4048ms-inverter& ... 332#p57655

PIP-4048MS inverter

Posted: Wed, 24 Jun 2015, 18:20
by PlanB
You're right of course Dave, can you recommend an affordable accurate RMS plug in appliance checker power measuring thingamy

PIP-4048MS inverter

Posted: Wed, 24 Jun 2015, 20:17
by weber
PlanB wrote: You're right of course Dave, can you recommend an affordable accurate RMS plug in appliance checker power measuring thingamy

The Power Mate Lite here https://shop.ata.org.au/product-categor ... -test-gear
provided you won't have more than 10 A. Manual here:
http://www.power-mate.com.au/pdfs/PML%2 ... 20R1-8.pdf

I wouldn't trust the $29 one as far as I could kick it.

PIP-4048MS inverter

Posted: Wed, 24 Jun 2015, 22:32
by offgridQLD
I would like to see some back to back tests to prove how bad the $29 job is compared to the other one.

Not saying it's great .

Kurt

PIP-4048MS inverter

Posted: Wed, 24 Jun 2015, 22:46
by Johny
I'd love to hear of ANY cheapies [ edit: power meters] that handle the non-linear load placed by rectifier/capacitor input (non PFC) switch mode supplies/chargers.

I have had no success with cheapies. When my car draws 2700W according to the house smartmeter (which verifies with expensive power meters I have borrowed), most power meters under $100 I've tried show anything from 1500W to 3000W.

I would LOVE a solution that let's me easily verify charge power every half hour or so overnight. Sorry - a bit off-topic.

[ Edited by Coulomb: since this happens to start a new page, mention the subject. ]

PIP-4048MS inverter

Posted: Thu, 25 Jun 2015, 00:37
by PlanB
Two hundred & eighty bucks is a lot of meter compared to twenty eight bucks. I'd be tempted to buy it if it went to 15A instead of just 10A (I could check the Leaf EVSE too then). The cheapie reckons it knows power factor, why can't I just multiply its kVa reading by that to get kw?

Interested in your results Kurt. The sequence here is interesting. When I first plug the mains in the LCD shows the load (just the inverters feeding the 60w lamp) powered from the battery & I get 0.1A mains in. Then, after a few secs, the LCD shows mains bypass to the load & the battery isolated, mains current jumps to 3.4A. Then the display shows bypass with batt charging & the mains current climbs to 4.7A. So the bulk of it is the 3.4A in bypass mode. I thought bypass switched the mains straight through to the output bypassing everything?

PIP-4048MS inverter

Posted: Thu, 25 Jun 2015, 01:01
by offgridQLD
Yes the one I have will display power factor. Though you usually get what you pay for and I don't see why the more expensive one wouldn't be considerably better - more accurat. It defanatly has way more features.

The AC power meters that just have a clamp and don't measure voltage are rubbish. I gave that one away. Though I would need a much better one as a reference to prove how bad the one I have is. I'm keen to test it if anyone in Brisbane has a good one?

Let me see if I can find a 60w resistance load and see what my meter thinks it is. Won't be until the weekend (meter is at the other house)

Kurt

PIP-4048MS inverter

Posted: Thu, 25 Jun 2015, 01:39
by weber
I see $125. Power Mate Lite. I wouldn't trust the so-called power factor figure of the cheapie.

PIP-4048MS inverter

Posted: Thu, 25 Jun 2015, 17:30
by coulomb
PlanB wrote: I'd be tempted to buy it if it went to 15A instead of just 10A (I could check the Leaf EVSE too then).

There is a HD model that handles 15 A through a 10 A plug, but it's even a bit more expensive at $320.

PIP-4048MS inverter

Posted: Thu, 25 Jun 2015, 17:31
by reecho
I have the Power Mate 15A version. Worth every cent....

Oh and buy direct from the manufacturer if you want to save some coin....

CCI Online Shop