Search found 62 matches

by andys
Sun, 12 Nov 2017, 11:53
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Thanks for the hard work. I am looking forward to trying it out.

My usage is likely to be to default the current to zero (for safety / full battery), and have the BMS set maximum possible charge current when the battery is not full, and not really anything in between.
by andys
Wed, 18 Oct 2017, 13:34
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Computer control easy I can do that already , you only need a relay with 4 poles less than $5. Do you want control with a web page so any device can be used eg smart phone? No, I've got a little embedded computer which will power up extra units depending on time of day, load, and battery %soc .. do...
by andys
Wed, 18 Oct 2017, 12:08
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Sure - but I actually wanted it to be computer controlled and 4-way or 4x relays is overkill unless absolutely necessary :)
by andys
Wed, 18 Oct 2017, 08:47
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Does anyone know if the remote on/off inputs can be "daisy chained" ? Can I switch on/off two or more inverters at the same time by connecting their NC/NO contacts in parallel or series and a single switch?
by andys
Sun, 15 Oct 2017, 05:46
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Zero would be great. I always thought it was a serious deficiency that they don't allow you to simply stop charging completely (except by swizzling voltages).

(There really should be a physical input terminal that disables all charging)
by andys
Sat, 14 Oct 2017, 15:20
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Thanks for the explanation weber. I can still work with that, but if it stops receiving commands (something broken or an emergency), could it default to 0A instead of 2A?
by andys
Sat, 14 Oct 2017, 14:12
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

So if you get it working, we'll be dynamically setting the voltage, right? Not the current.

Which makes sense: when we want to stop charging, we want the current to be 0A (at float voltage), not 2A (the minimum current you are able to specify).
by andys
Sat, 07 Oct 2017, 06:06
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

By the way weber/coulomb, I've been meaning to ask: Did you ever come across code that governs AC charging? Specifically resetting charge back to zero for another "sweep" all the time. It really seems like a bug, since it happens even when charging off mains and not a generator.
by andys
Sat, 07 Oct 2017, 06:03
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Coulomb and I spent the day investigating the feasibility of a dynamic maximum charge current command. This sounds good! I have been reluctant to flash mine thus far, since I don't ever let the PIP reach bulk charge termination. I've never tried the MNCHGC command. I am setting up a new (parallel) ...
by andys
Fri, 06 Oct 2017, 08:29
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

hennejg if your solar input and battery are sized optimally, I think you don't really need to worry that much about charge rate - you can set things up so that the PIP will be sending its maximum charge to the battery for say, 96% of the battery capacity. You can then switch to a lower charge rate (...
by andys
Wed, 04 Oct 2017, 11:41
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Hi andys. I never claimed to measure it. You will see that I refer to it as "estimated" every time I mention it. Ah yes! Very clever indeed, especially the way you determine charge completion. (Although in practice I've noticed the voltage can be "sticky" during periods of transition from charge to...
by andys
Wed, 04 Oct 2017, 10:25
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

weber how do you measure open circuit voltage while the battery is still a member of a possibly charging or discharging pack?
by andys
Wed, 04 Oct 2017, 03:32
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

I am updating the PIP twice day over serial via PBFT command to begin and end rapid charging. Other than wearing out the EEPROM (not sure how many cycles it would support?) it is working well for me.
by andys
Fri, 29 Sep 2017, 05:38
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Thank you ghatikar, most interesting. This situation is quite frustrating as I'm not sure what generator to buy for my new system (4 x parallel PIP) because I don't know what it will be able to charge at. Also I am not using generators with AVR, just the constant RPM direct AC type. I have been look...
by andys
Thu, 17 Aug 2017, 14:49
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

Re: PIP-4048MS inverter

Just tried a new generator - its a Honda 13HP petrol with 8kW alternator. Reading a strong 240VAC while maintaining 50 amps PIP charge rate, for quite some time before dropping out. Then it gets worse and worse, shorter periods until the next drop out. I tried removing all other AC loads and it just...
by andys
Sun, 11 Jun 2017, 17:43
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

Lately my mains input has been higher, around 245-250V. I have been successfully charging at 40A with no drop-outs.

Feels like it might have a "hair trigger" on change in input voltage or phase which makes it stop charging suddenly when on lower voltages or generator.
by andys
Wed, 17 May 2017, 15:24
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

I noticed there's now a PIP5048MS on sale

http://www.ebay.com.au/itm/142343699895

Anyone got any information on this? It looks like the same as the 4048 but with an upgraded AC inverter? Very annoying as I just purchased a bunch of 4048s :)

[ Edited Coulomb: clickable link ]
by andys
Fri, 12 May 2017, 18:50
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

Similar behaviour to mine, but yours is triggering quickly at 30A, mine can go up to 40A and sit there for 5-10 minutes (less if I'm running loads too).
by andys
Fri, 12 May 2017, 15:46
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

I should add that the exact same thing happens to me when charging on mains (grid). Due to high cable length and poor quality, the voltage drops to 220V and below, and the pip cuts out at around the same point.

I always assumed it was just a low voltage cut-out but maybe something else is going on.
by andys
Fri, 12 May 2017, 13:40
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

With my much smaller (single cylinder Honda) generator I experienced the same thing. The generator is rated for over 3kW output, but once I go above around 2.2kW the voltage at the PIP input sags below about ~220VAC, the PIP cuts out and starts ramping up from zero again. I can trigger this pretty r...
by andys
Thu, 04 May 2017, 19:06
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

I'm also working on a shed+house setup and it just seemed too hard to balance loads, so I'm attempting to stick to single phase.

Also I've discovered you can single phase 4 pole electric motors in up to 3.7kW (5HP) so I can't see single phase ever being a problem for me.
by andys
Mon, 27 Mar 2017, 14:56
Forum: For Sale/Wanted
Topic: ADC 8" motor. Zeva Controller
Replies: 6
Views: 373

ADC 8" motor. Zeva Controller

Hi! I'm extremely interested in this, but I live in NSW, would it be possible to post it?
by andys
Mon, 20 Mar 2017, 14:06
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

I still think they need more cooling the fans were slowed down too much, my units (the older ones with external black heatsink) get to over 50C on the inverter heatsink inside the units, so I have external temperature controlled fans to keep it below 40C I think I found a simple solution for this t...
by andys
Sat, 18 Mar 2017, 21:43
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

Had a brainstorm today and figured out I am happy to just mount the damn units upside down to improve heat transfer, and just flip the display (very easy, only takes seconds) to make it easy to use. Just wanted to share with anyone thinking of flipping the fans - this seems easier and safer. Sorry i...
by andys
Sun, 05 Mar 2017, 14:04
Forum: The Lounge
Topic: PIP-4048MS inverter
Replies: 1861
Views: 168816

PIP-4048MS inverter

Just curious what generator everyone is using with these units.

I have been successfully testing my Honda "tradie" style generator (3.3kVa) at 30A or 40A, but it is not big enough for new system, I'd like to charge at up to 10kW.