Search found 205 matches

by paulvk
Thu, 16 Jan 2020, 07:52
Forum: Renewable Energy and Storage (Non-EV)
Topic: PV Inverters and batteries
Replies: 25
Views: 5556

Re: PV Inverters and batteries

If they are sealed batteries you need to keep the voltage to less than 2.4 volts per cell this is the voltage at which they gas causing loss of water and drying them out 12v = 14.4v 24v = 28.8v 48v = 57.6v But as the inverters tend to overshoot I set my 48v sealed banks to 56.4v and often see it at ...
by paulvk
Thu, 16 Jan 2020, 07:21
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 174
Views: 14671

Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

I was going to get 64v PIPs but with the software bugs and the problem of not doing so good a sine wave at the low end of NiFe voltages
I have decided to try voltage boosters.
Note Henkel adhesives had no glue to take KOH long term going to see if I can get a case made to fit the cell.
by paulvk
Wed, 15 Jan 2020, 17:53
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 174
Views: 14671

Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Sorry to hear about the NiFe cells all my ones appeared to test ok when charged and discharged
as 12v sets they ran 5 x 50 watt halogen lamps for m ore than 10 hours and still at 1.2 volts
only problem is one cell has cracked case and finding a glue to seal it is proving difficult
by paulvk
Mon, 13 Jan 2020, 12:16
Forum: Renewable Energy and Storage (Non-EV)
Topic: Inverters in parallel to power a house
Replies: 8
Views: 154

Re: Inverters in parallel to power a house

Forgot about those batteries must be the smoke was like fog yesterday.
How about having the BMS shut down the inverters at a preset current
by paulvk
Mon, 13 Jan 2020, 11:25
Forum: Renewable Energy and Storage (Non-EV)
Topic: Inverters in parallel to power a house
Replies: 8
Views: 154

Re: Inverters in parallel to power a house

I installed 2 x PIP4024MS inverters in parallel
At 8000 watts that is an boat load of amps at 24V close to 400 amps what batteries have you for this.
Could the fix be to add yet another inverter
That would be 600amps
by paulvk
Mon, 13 Jan 2020, 06:29
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 174
Views: 14671

Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

In the GE model, atleast with mine. The fans come On at 41c and turn off at 34c.
Looks like they have adopted another of my suggestions
by paulvk
Mon, 13 Jan 2020, 06:21
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP 3024GK Error 09
Replies: 5
Views: 116

Re: PIP 3024GK Error 09

I have the PIP4048 and when I measured the heatsink temps it went as high as 55c . As I do not like this sort of temperature on power supplies I have built I was not happy with this so I attached two 120mm fans to the two side vents pulling air out and used a temperature control from e-bay. I insula...
by paulvk
Fri, 10 Jan 2020, 05:54
Forum: Renewable Energy and Storage (Non-EV)
Topic: Caravan on lithuim..
Replies: 2
Views: 72

Re: Caravan on lithuim..

The experiment appears to be "how to kill AGM batteries"
You may need to do a video to show them why lithium is a better choice in mobile situations.
by paulvk
Fri, 27 Dec 2019, 17:08
Forum: Renewable Energy and Storage (Non-EV)
Topic: Interworking a Sunny Island with a Redflow Flow battery
Replies: 10
Views: 293

Re: Interworking a Sunny Island with a Redflow Flow battery

preventing the SI from a shutdown Yes and maybe the NiFe could do the job as they would work as the dump load voltage regulator and unlike lead acid will not complain the 1.65V is for a full absorption charge. With the 36 cells I have across the lead acid they are charging at 20 amps when the lead ...
by paulvk
Fri, 27 Dec 2019, 13:15
Forum: Renewable Energy and Storage (Non-EV)
Topic: Interworking a Sunny Island with a Redflow Flow battery
Replies: 10
Views: 293

Re: Interworking a Sunny Island with a Redflow Flow battery

Your looking at the similar problem as I have. I have a 200Ah nickel iron battery which needs 1.65 volts per cell to charge but is 1.2 volt per cell discharge. With my inverters 50 volts is a good battery voltage so 41 cells gives 67.65 volts charge max of inverter is 60 volts. The flow battery is s...
by paulvk
Mon, 16 Dec 2019, 18:24
Forum: Renewable Energy and Storage (Non-EV)
Topic: 3-phase hybrid inverters?
Replies: 12
Views: 909

Re: 3-phase hybrid inverters?

assuming Western Power are OK with it
Probably not as it has to be on the list of approved units
by paulvk
Tue, 03 Dec 2019, 12:55
Forum: Renewable Energy and Storage (Non-EV)
Topic: Nickel Iron Batteries real data
Replies: 20
Views: 1267

Re: Nickel Iron Batteries real data

You have the same cells as my old ones the 4 new ones are translucent white much more difficult to see the level of the electrolyte The new ones have the max fill level 20 mm from top of case I actually think the others can be filled higher Note both external dimensions the same. My enclosure is ste...
by paulvk
Sun, 01 Dec 2019, 06:19
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter repairs and hardware modifications
Replies: 370
Views: 17134

Re: sunny day but 0V from PV

If the board is dead, can I bypass it connecting the out of external mppt ?(I think the output is the red and black cables in the middle of the board). Those terminals are across the battery input so no different than connecting your external MPPT charger onto your battery. I have external MPPT cha...
by paulvk
Sat, 30 Nov 2019, 19:31
Forum: Renewable Energy and Storage (Non-EV)
Topic: Nickel Iron Batteries real data
Replies: 20
Views: 1267

Re: Nickel Iron Batteries real data

Have now made the battery enclosure and installed the cells in it. I will take a picture when I have cleaned up , a big rearrangement was needed to make space for them I purchased 4 more new cells to bring the number to 41 I have connected 36 cells in parallel with the lead acid banks as an experime...
by paulvk
Sat, 23 Nov 2019, 18:07
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 174
Views: 14671

Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

I recently had a problem similar to this. My 30ma protection circuit breaker was tripping with my washing machine but only while running on the inverter change to grid circuit with its own 30ma protection breaker all worked fine the machine is 30 years old I replaced the starting capacitor with a ne...
by paulvk
Sat, 16 Nov 2019, 15:34
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2504
Views: 501872

Re: PIP-4048MS and PIP-5048MS inverters

Now that I have found some software to capture the animated screen
here is it working
Note got rid of dry cell battery now have animated one and got rid of light globe house makes more sense
https://youtu.be/irECmmy1-ds

This will be my base screen for normal monitoring

Regards Paul
by paulvk
Thu, 14 Nov 2019, 15:05
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 174
Views: 14671

Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

This means that the 64 V models can no longer produce a sine wave when the battery voltage falls below 48 V! Instead, the waveform is clipped top and bottom, and this gets worse as the battery drops further. In the 58.4 V models, the onset of clipping is a far more acceptable 42 V. So it seems that...
by paulvk
Thu, 07 Nov 2019, 18:16
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2504
Views: 501872

Re: PIP-4048MS and PIP-5048MS inverters

Been working with the Nextion display. Not have it working with inverters yet as I have to write code to go into an atmel AVR to sit between the display and inverter but getting the graphics together Note the yellow dots are animated just like watch power but I had to build this screen myself even t...
by paulvk
Fri, 25 Oct 2019, 19:16
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2504
Views: 501872

Re: PIP-4048MS and PIP-5048MS inverters

I have got myself a couple of Nextion https://nextion.tech/ displays and am going to try and make touch screen remote panel for the inverters with the atmel AVR sending code to the display and inverter , I already have the AVRs interrogating the inverter as can be seen on an earlier post but with th...
by paulvk
Tue, 22 Oct 2019, 15:09
Forum: Renewable Energy and Storage (Non-EV)
Topic: AGM for home storage?
Replies: 6
Views: 631

Re: AGM for home storage?

Lead acid the rule is use 20% to get long life Lead acid sealed no more than 1/10 of Ah as current so 100Ah 10 amps max , 500Ah 50 amps max Flooded lead acid can cope with greater discharge currents because you can add water Giant power batteries "STAY AWAY" too many having problems! Best lead batte...
by paulvk
Mon, 14 Oct 2019, 07:07
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 174
Views: 13938

Re: PIP-5048MK inverter

Hello dekin The HLK-RM04 is an rs232 to tcpip converter , wireless access point and router. If you use one at the inverter and a computer for monitoring you install "NetBurner Virtual Comm Port" on the computer and it appears as a normal com port on the computer. If you use two HLK-RM04 one at each ...
by paulvk
Wed, 02 Oct 2019, 07:19
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2504
Views: 501872

Re: PIP-4048MS and PIP-5048MS inverters

Prajna have you the communication protocol PDF file , also if you have the internet at both places you can use the HLK RM04 to connect to the inverters.
I have ATMEL AVR here talking to my inverters showing what watch power does but on two LCD screens.
Regards Paul
by paulvk
Fri, 27 Sep 2019, 17:03
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 174
Views: 13938

Re: PIP-5048MK inverter

I use the HLK RM04 wifi to rs232 works great.
by paulvk
Wed, 25 Sep 2019, 07:24
Forum: Renewable Energy and Storage (Non-EV)
Topic: Is anyone using an arc welder with an offgrid system
Replies: 107
Views: 6120

Re: Is anyone using an arc welder with an offgrid system

a. Neutral link to ground. b. Ground to existing house ground (copper stake). NO definitely do not do this is against the rules you will have two earths on the neutral!!!! With the newer units they have a relay for the neutral link. If you are going to connect the inverter to a grid or generator wit...
by paulvk
Mon, 23 Sep 2019, 09:19
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter repairs and hardware modifications
Replies: 370
Views: 17134

Re: PIP inverter repairs and hardware modifications

I have the original parallel PIP4048s (big heatsink on top) with the original capacitors but my mosfets on the DC side are 80v (original with units) its now nearly 5 years I run my washing machine , two sometimes 3 split ACs , refrigerator and two 700 watt water pumps so plenty of inductive loads so...