Search found 42 matches

by TyTower
Tue, 02 Mar 2021, 16:33
Forum: Renewable Energy and Storage (Non-EV)
Topic: MPP HV2-5048 Earthing of output
Replies: 15
Views: 361

Re: MPP HV2-5048 Earthing of output

This statement from MPP Solar concerned me so I include it here . I believe this relates to an old problem with panels that does not exist with modern panels. Earth leakage of the negative in the panels themselves. This is the statement from MPP Solar's HV2-5048 PV panel selection for HV2 models Bec...
by TyTower
Sun, 28 Feb 2021, 05:39
Forum: Renewable Energy and Storage (Non-EV)
Topic: How to get plastic flexible tubing into the bottom of 5048 style inverter/chargers?
Replies: 6
Views: 174

Re: How to get plastic flexible tubing into the bottom of 5048 style inverter/chargers?

Hi , I'm not getting much from that picture its a bit close . I take it the 50mm square is on the left screwed to the wall and cable inside . With the circular flex did you cut the box at the gland entry point some way to get the screw gland in? Thanks Terry ..still to get a satisfactory result with...
by TyTower
Wed, 24 Feb 2021, 17:36
Forum: Batteries, charging, management and monitoring
Topic: 12-cell CAN-based BMS modules
Replies: 13
Views: 2893

Re: 12-cell CAN-based BMS modules

Terry, I don't limit the charge to 3.4v The charger is always set at 3.65v . I stop charging when the plate voltage reaches 3.4v. jonescg, I disagree, that's pushing t too close for me and I stick to 3.4v but I make sure its accurate. When you charge the plates to 3.55 v leave it for half an hour an...
by TyTower
Sun, 21 Feb 2021, 18:46
Forum: Batteries, charging, management and monitoring
Topic: 12-cell CAN-based BMS modules
Replies: 13
Views: 2893

Re: 12-cell CAN-based BMS modules

Terry ions stick in it and are not able to move so they are taken out of the total available ions . Capacity loss is what you see.
by TyTower
Sun, 21 Feb 2021, 16:19
Forum: Batteries, charging, management and monitoring
Topic: Device to charge EV only when solar panel are producing?
Replies: 9
Views: 478

Re: Device to charge EV only when solar panel are producing?

Smappee EV Wall Electric Vehicle Charger
$2,198.90 – $3,346.20 incl. GST

Gee and you can get black or white with that too !
by TyTower
Sun, 21 Feb 2021, 07:12
Forum: Batteries, charging, management and monitoring
Topic: Normal/Acceptable Battery Sag?
Replies: 4
Views: 522

Re: Normal/Acceptable Battery Sag?

I can offer a graph of discharge at different rates from EVPower which I found on their web site and which matches the experience and graphs I have produced doing similar tests .. I think the graphs given by re-sellers of cells are all imaginary creations to sell you. Its LFP technology so 3.2v nomi...
by TyTower
Sun, 21 Feb 2021, 06:51
Forum: Batteries, charging, management and monitoring
Topic: Device to charge EV only when solar panel are producing?
Replies: 9
Views: 478

Re: Device to charge EV only when solar panel are producing?

I fully believe this is the sensible way to go with a Zappi or an Eddi . But the cost ! $700+ ? I want a hot water heater when energy is available and my batteries are charged and the circuitry required must be fairly simple . Just a voltage controlled switch really that can only operate when my bat...
by TyTower
Sun, 21 Feb 2021, 06:03
Forum: Batteries, charging, management and monitoring
Topic: 12-cell CAN-based BMS modules
Replies: 13
Views: 2893

Re: 12-cell CAN-based BMS modules

I'm assuming these are for LFP ? If so the 3.65v is a max and no further no matter what anyone says . You are clogging the SEI layer just by being up at 3.65v . They should stay down at 3.4v because the majority of the capacity is within 3.0 volts and 3.4volts . Can they be adjusted down? How would ...
by TyTower
Tue, 16 Feb 2021, 11:44
Forum: Renewable Energy and Storage (Non-EV)
Topic: How to get plastic flexible tubing into the bottom of 5048 style inverter/chargers?
Replies: 6
Views: 174

Re: How to get plastic flexible tubing into the bottom of 5048 style inverter/chargers?

Thanks . Gonna try heating it with a heat gun and working it in but the split tube just for a half inch might work too if it won't go otherwise.
by TyTower
Mon, 15 Feb 2021, 11:56
Forum: Renewable Energy and Storage (Non-EV)
Topic: How to get plastic flexible tubing into the bottom of 5048 style inverter/chargers?
Replies: 6
Views: 174

How to get plastic flexible tubing into the bottom of 5048 style inverter/chargers?

The entry opening on these inverters is rectangular and has a flimsy plastic frame around with a split which promptly falls off. My cables coming in are power point type double insulated wire and its in a 25 mm round plastic flexible pipe . There is too much close wiring and boards to just drill a r...
by TyTower
Wed, 10 Feb 2021, 10:58
Forum: Renewable Energy and Storage (Non-EV)
Topic: Cost of running a PIP-5048MG on grid
Replies: 4
Views: 483

Re: Cost of running a PIP-5048MG on grid

And between the ears where the noise goes in and out too it seems :D
by TyTower
Fri, 05 Feb 2021, 06:03
Forum: Renewable Energy and Storage (Non-EV)
Topic: Cost of running a PIP-5048MG on grid
Replies: 4
Views: 483

Re: Cost of running a PIP-5048MG on grid

So CB is that a CB Radio? or maybe Contact Breaker somewhere. GTI ? Grid Tied Inverter? RCBO Residual Current Breaker? So I'm thinking you have this inverter on batteries normally and the grid and its using some power from the grid . You have decided its the inverter taking it ,is that right? If tha...
by TyTower
Wed, 03 Feb 2021, 06:01
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 51
Views: 3692

Re: 12v lithium batteries can be paralleled?

I guess you'll think I'm chasing you again Terry but I'm not . I just disagree with your assertions sometimes and you post in threads I'm watching. I'm thinking you might be the Terry making the robot with videos on utube? Some alloy cells are negative on the outside shell and some are not . I can't...
by TyTower
Fri, 29 Jan 2021, 17:25
Forum: Renewable Energy and Storage (Non-EV)
Topic: Monitoring & control software, what are you using and why?
Replies: 26
Views: 1668

Re: Monitoring & control software, what are you using and why?

We have several different monitoring systems running. I am using ICC on the non-grid connected system. It might be closed source, but I find it reliable for about 40 days and then it needs a reboot. It's got its own RPi. The main monitoring is python scripting read by Cacti. I've paid for the educa...
by TyTower
Wed, 20 Jan 2021, 18:17
Forum: Renewable Energy and Storage (Non-EV)
Topic: Caravan upgrade to 24v or 48v
Replies: 9
Views: 393

Re: Caravan upgrade to 24v or 48v

Old thread but . The point of going to 48 volts ,actually around 54 volts usually, is the higher voltage needs smaller diameter wiring because only a quarter of the amps flow. This also gives less voltage drop over distance runs. DC up to about 90 volts is fairly safe and stick welders commonly run ...
by TyTower
Wed, 20 Jan 2021, 13:49
Forum: Holden/Chev Volt
Topic: Volt agreed value for insurance - can anyone help?
Replies: 3
Views: 665

Re: Volt agreed value for insurance - can anyone help?

Not what you want but usually you negotiate the value up by them inspecting the car and giving you a personal value.Doubt anything else will persuade them otherwise.
by TyTower
Wed, 20 Jan 2021, 13:45
Forum: The Lounge
Topic: Hi all, newbie here from Vic
Replies: 5
Views: 250

Re: Hi all, newbie here from Vic

If you want to get some in depth basics on LiFePo4 which is just a safer version of Lithium Ion cells go here
https://www.facebook.com/groups/271980786862023/
by TyTower
Wed, 20 Jan 2021, 13:39
Forum: MG EVs
Topic: Battery balancing is a thing
Replies: 9
Views: 532

Re: Battery balancing is a thing

I don't have an EV but would like to . Most batteries generally the capacity is the top voltage reached by any one cell or pack as when it charges to there it turns off . The lower voltage limit is when the cell you mention gets down to your set bottom limit. Your capacity is between those two point...
by TyTower
Wed, 20 Jan 2021, 05:20
Forum: Batteries, charging, management and monitoring
Topic: k226e01 Battery's
Replies: 8
Views: 403

Re: k226e01 Battery's

I would try cycling the cells between 3.8v and 2v for 2 cycles at the suggested 1.6 amp max charge/discharge rate. This will wake up the cells and free up any sluggish tranfer of the lithium ions in and out of both the cathode and anode. We do this with higher capacity prismatic cells that have not...
by TyTower
Sun, 17 Jan 2021, 19:03
Forum: Renewable Energy and Storage (Non-EV)
Topic: MPP HV2-5048 Earthing of output
Replies: 15
Views: 361

Re: MPP HV2-5048 Earthing of output

OK I think I understand now thanks. Downstream being from the viewpoint of power flowing in from the source -->load. Of course that's not what my intention was anyway after the RCD but I guess if the plug outlet earth is joined to the earthing network as it should be then the RCD would operate corre...
by TyTower
Sun, 17 Jan 2021, 14:40
Forum: Renewable Energy and Storage (Non-EV)
Topic: MPP HV2-5048 Earthing of output
Replies: 15
Views: 361

Re: MPP HV2-5048 Earthing of output

If there there is an earth on the neutral down stream from an RCD unbalanced current will flow as current will flow on the earth back to the MEN link so it will trip. Nope still not with it . Must be a bit thick . down stream meaning ? If the inverter produced A/C goes through an RCD before the pow...
by TyTower
Sun, 17 Jan 2021, 06:01
Forum: Renewable Energy and Storage (Non-EV)
Topic: MPP HV2-5048 Earthing of output
Replies: 15
Views: 361

Re: MPP HV2-5048 Earthing of output

Also in the above diagrams having an earth stake at a sub board is rarely done.... the out buildings would have to be a long distance away and doing so prevents you having an RCD up stream,...... with my inverters I only earth the neutral while the inverter is running ....... as the neutral and act...
by TyTower
Sat, 16 Jan 2021, 10:06
Forum: Renewable Energy and Storage (Non-EV)
Topic: MPP HV2-5048 Earthing of output
Replies: 15
Views: 361

Re: MPP HV2-5048 Earthing of output

Fluke explains it better than I: https://www.fluke.com/en-au/learn/blog/digital-multimeters/dual-impedance-digital-multimeters I'm suggesting the 48vac difference measured is more a ghost voltage than anything to be concerned about. A cheap way to do it without a LoZ capable meter would be to put a...
by TyTower
Sat, 16 Jan 2021, 06:59
Forum: Renewable Energy and Storage (Non-EV)
Topic: battery farm on site of old coal power stations
Replies: 6
Views: 227

Re: battery farm on site of old coal power stations

My initial thought was what a good move . Use the infra structure already set-up and save demolition and waste . Transmission would be by 64Kv lines anyway and in A/C so no more lossy than the original. Take into account the future advances in battery technology . Hydrogen might be better sited out ...