Search found 121 matches

by solamahn
Wed, 24 Jun 2015, 14:31
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter repairs and hardware modifications
Replies: 361
Views: 10859

Re: PIP inverter repairs and hardware modifications

This is what I found in the 3248/4048 service manual. ALL of the mosfet are 11-320110-00G (MOSFET IR/IRFB3307ZPBF 120A 75V N BULK TO-220).* *: In the new version, they will be 11-320138-00G (MOSFET TI/CSD19505KCS 201A 80V N BULK TO-220) or 11-320117-00G (MOSFET IR/IRFB3077 210A 75V N BULK TO-220) No...
by solamahn
Tue, 23 Jun 2015, 23:34
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

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.
by solamahn
Tue, 23 Jun 2015, 16:24
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

The one I am using now is 52.25
by solamahn
Tue, 23 Jun 2015, 15:03
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

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.
by solamahn
Tue, 23 Jun 2015, 14:23
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

Yes. Charges just how it should.
by solamahn
Tue, 23 Jun 2015, 13:32
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

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...
by solamahn
Tue, 23 Jun 2015, 12:51
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

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.
by solamahn
Tue, 23 Jun 2015, 12:43
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

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...
by solamahn
Tue, 23 Jun 2015, 10:22
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

If the middle green led is solid, that is float. I am just thinking about these inverter failures. Could be a combination of full battery, maximum w of panels and the load. Full battery will not regulate the DC voltage as well as a not full battery. Maximum w of panels has the ability to supply a lo...
by solamahn
Mon, 22 Jun 2015, 23:00
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

I dont think there is any difference with the charge profile if you are using solar charge or ac charge. I will test a 4048 also.
by solamahn
Mon, 22 Jun 2015, 22:39
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

This 50v thing is not a fault. They are designed that way. The idea must be that if the batteries are above 50v at the start of the day, then they dont need bulk/absorb. I only did the test with 2424msx and 2448ms on the bench using ac charge. I just connected 4 batteries and took their voltage down...
by solamahn
Mon, 22 Jun 2015, 22:32
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

I am thinking of changing all 4 caps on new inverters. Same as I used to have to pre delivery modify the fans and Dc cable screw tightness. I have been wondering what caused those mosfet failures. I thought it could have been overloaded but my system gets overloaded every now and then (not by me) an...
by solamahn
Mon, 22 Jun 2015, 22:14
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

Back from the crocodile infested country. One thing I did find out about pips is that if the battery voltage is above 50 at the start of the day, then they go straight into float and do not do bulk/absorb stages. I tested on 2424msx and 2448ms and found this to be the case. I have not noticed this o...
by solamahn
Fri, 19 Jun 2015, 16:04
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

I had a problem with an early modem 4048ms. If batteries were full, and a high load was turned off, the battery voltage would climb to 60 and inverter would turn off and then turn on again and everything would be ok untill a high load was turned on and off. Later software fixed this problem. I could...
by solamahn
Fri, 19 Jun 2015, 02:10
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

I am just wondering how high solar panel Voc on a cold morning could cause a problem with a scc. The scc would load the panels and prevent them from exceeding the scc Vmax
by solamahn
Fri, 19 Jun 2015, 01:37
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

72 cells. 36v panels. about 40 Voc. I used to use 2s because I thought that the Vmp should be just a bit above the battery voltage. I find 2s runs at about 60v so you would think that was right but 3s at 90v seems to work better. MPPSolar advised me to use 3s. I still use 2s or 1s on hs models. 1s f...
by solamahn
Thu, 18 Jun 2015, 23:58
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

I have had no problems with the 4048ms scc even with 15 x 280w connected 5 x 3 and all facing the same direction. I did not do any proper testing of 2s v 3s but 3s feels like its working better plus less cable and dc breakers.
by solamahn
Thu, 18 Jun 2015, 23:30
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2470
Views: 477452

PIP-4048MS inverter

[Moderator note: Preceding exchanges with solamahn at this time can be found here .] That's what I like to hear. I have no experience with lifepo4 but from what I have read, it is best to keep them in the flat part of their charge discharge volts v soc graph. Also read that unlike pb, where 100% soc...
by solamahn
Thu, 18 Jun 2015, 19:45
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter repairs and hardware modifications
Replies: 361
Views: 10859

Re: PIP inverter repairs and hardware modifications

Good. Thanks. I was going to get 2 lots of 16 lifepo4 for 2 jobs, then thought of just get 2 x 15 but now, I will go back to 2 x 16.
by solamahn
Thu, 18 Jun 2015, 18:57
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter repairs and hardware modifications
Replies: 361
Views: 10859

Re: PIP inverter repairs and hardware modifications

Thankyou. Pb poses a problem with program 29. I would like to set it to 48v but then I could get lvd in the morning if lower soc and high load and then have to wait till 52v for the inverter to automatically turn on again. If the setting in 29 also was adjusted for load like in program 05, that woul...
by solamahn
Thu, 18 Jun 2015, 12:00
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter repairs and hardware modifications
Replies: 361
Views: 10859

Re: PIP inverter repairs and hardware modifications

I have been installing mppsolar pip inverter/charge controllers in Papua New Guinea for about 2 years. About 75 sites now. From 812HS to multiple 4048MS. Price attracted me to this brand. I have had my fair share of problems though. Fans. The soldered terminals would corrode. Depending on which term...