Search found 3476 matches

by Richo
Fri, 24 May 2019, 13:19
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

Oh and in the 32V/36V system it wouldn't be practical to connect a battery pack.

So you either have the 32/36V system and never have a battery.
OR you go with the 48V system and use PV controllers and have the option of a battery.
by Richo
Fri, 24 May 2019, 12:54
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

A XP power HDS3000PS36 trimmed to 31.5V would be about right.
by Richo
Fri, 24 May 2019, 12:34
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

IF the system has NO battery AND using diodes from the panels direct onto the DC bus. For the 310W panels "typically" they have an output voltage range of 32-40V. Now this doesn't suit the existing 48Vdc/240Vac inverter. However there are some "36V" to 240Vac inverters that have an input range of 31...
by Richo
Fri, 24 May 2019, 12:19
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

Ah LTO's are too expensive for home storage at this stage.
The only reason I suggested them is its a small pack that has to handle high charge/discharge.
Really only there to stabilise the system when using the MPPT charge controllers.
by Richo
Thu, 23 May 2019, 13:18
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

David57 wrote:
Mon, 06 May 2019, 19:56
i receive a first part of 32x310Wc panels
Do you have the actual data on the 310W panels you have as there seems to be some differences between brands.
Vp ??
Voc ??
by Richo
Thu, 23 May 2019, 12:40
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

Normally I suggest all cells are parallel first then those put in series to a make a string. So LTO/LiFePO4/Lipo all have different voltages so this is not possible. A series of small LTO performance cells then in parallel with a large general pack of LiFePO4 may end up "balanced". So 10A draw would...
by Richo
Wed, 22 May 2019, 12:54
Forum: Admin Notices
Topic: AEVA Non-Secure so Password Issue
Replies: 12
Views: 119

Re: AEVA Non-Secure so Password Issue

mikedufty wrote:
Tue, 21 May 2019, 22:38
I hear hacked AEVA forum accounts are quite sought after on the dark web.
:lol: That's how I got mine after getting banned :lol:
by Richo
Tue, 21 May 2019, 12:45
Forum: Batteries, charging, management and monitoring
Topic: EOI - New Yinlong LTO cells Australia
Replies: 50
Views: 1731

Re: EOI - New Yinlong LTO cells Australia

Some of my headway cells are about that old. And some just up and died. Even though they worked fine with plenty of capacity 7 days earlier. Rarely used past 1C and always balanced. Whatever the action that causes it I still believe its real. Someone please buy some LTO's and get back to me in 25 ye...
by Richo
Mon, 20 May 2019, 12:36
Forum: Batteries, charging, management and monitoring
Topic: seeking advise - EV batteries oriented towards performance
Replies: 13
Views: 197

Re: seeking advise - EV batteries oriented towards performance

jonescg wrote:
Fri, 17 May 2019, 15:32
The 30C/60C cells are 160 Wh/kg
Hey now you're talkin :mrgreen:
by Richo
Fri, 17 May 2019, 12:56
Forum: Batteries, charging, management and monitoring
Topic: seeking advise - EV batteries oriented towards performance
Replies: 13
Views: 197

Re: seeking advise - EV batteries oriented towards performance

jonescg wrote:
Sun, 12 May 2019, 21:45
I build high powered LiPo battery packs which deliver crazy power
jonescg from some other forum wrote: Technically they are a 2C continuous, 5C peak
Yep that's crazy power. :roll:

:?:
by Richo
Fri, 17 May 2019, 12:49
Forum: Batteries, charging, management and monitoring
Topic: EOI - New Yinlong LTO cells Australia
Replies: 50
Views: 1731

Re: EOI - New Yinlong LTO cells Australia

I can't see a sudden loss of capacity happening in the next 10 yrs that would render the cells unsuitable for the job Don't confuse calendar life with cycle life. Dendritic action I believe. So the cell WILL just "die" one day even though yesterday it had 90-100% of the claimed capacity. MTBF ~10 y...
by Richo
Fri, 17 May 2019, 12:28
Forum: Batteries, charging, management and monitoring
Topic: Damn Chargers!
Replies: 6
Views: 138

Re: Damn Chargers!

10watt desk lamp....150watt cleaner...2400 watt heater and it worked fine. How many of these things actually used all 3 lines (Earth)? Possibly an earth leakage problem. Unplug your mains and charger from the car. Test the resistance between the each of the 3 pins of the mains charge port on your c...
by Richo
Thu, 16 May 2019, 13:05
Forum: Batteries, charging, management and monitoring
Topic: Damn Chargers!
Replies: 6
Views: 138

Re: Damn Chargers!

I'm under the impression you get mains from your house, plug it into the "fuel" port which then goes through an ON/OFF switch and a circuit breaker and then to the charger at the front of the car which then connect to the traction battery. The traction battery then connects to the controller and fin...
by Richo
Thu, 16 May 2019, 12:55
Forum: For Sale/Wanted
Topic: 3 ev at auction
Replies: 3
Views: 161

Re: 3 ev at auction

Leaf which you can't have as its Dan's https://www.pickles.com.au/cars/item/-/details/CP-10-13--Nissan--LEAF--ZE0--Hatchback--5-Seats--5-Doors/1040211720 Tesla: https://www.pickles.com.au/cars/item/-/details/NO-C-P--TESLA--Model-S/2980112197 I couldn't find an i3 so here are some hybrids https://www...
by Richo
Thu, 16 May 2019, 12:47
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

But solar power and needed current are totally unpredictable, with big jump, such oven, electric plate (all in the kitchen...), washing... Yes which is why, at the beginning, I suggested a small battery pack. But it needs to handle the peak output from the meanwell ie 9kW or peak output from solar ...
by Richo
Thu, 16 May 2019, 12:33
Forum: Batteries, charging, management and monitoring
Topic: EOI - New Yinlong LTO cells Australia
Replies: 50
Views: 1731

Re: EOI - New Yinlong LTO cells Australia

Nice.
The shipping agent should be able to tell you what vessel its on.
https://www.marinetraffic.com/en/ais/ho ... 29/zoom:13
by Richo
Tue, 14 May 2019, 12:59
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

The way I see it is a Micro with Boost circuit that runs both MPPT from the solar and PID Spread spectrum PWM on the output.
There is about AUD$15 in parts including the PCB.
I'm a bit surprised that this doesn't exist.
by Richo
Tue, 14 May 2019, 12:25
Forum: Batteries, charging, management and monitoring
Topic: Damn Chargers!
Replies: 6
Views: 138

Re: Damn Chargers!

Controller surge current through the breaker is the likely problem.
Also is the breaker a breaker or RCD or combo?

A pic from under your car at those bits might help.
by Richo
Mon, 13 May 2019, 12:56
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

I just see for the more simple, and the more low cost system (cost, not quality) MPPT are great for system that use all the power. Give money in a MPPT system that's not use the gain of power is a non sense. At 100€ for 310W, adding panel can be cheaper than electronics devices. Same for solar trac...
by Richo
Mon, 13 May 2019, 12:46
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

David57 wrote:
Sat, 11 May 2019, 14:52
just need in continuous 1 or 2 kVA, 3 or 4 if I use oven for cooking.
So in practice, the continuous loss are nor near 4000W.
So the "typical" loss in your situation is 250W-1000W.

Someone suggested that you use the loss to heat the water..
I thought it would turn to steam though :lol:
by Richo
Mon, 13 May 2019, 12:43
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

As @Richo already suggested above, the only difference is: 2 strings in series with cheap high powered buck converter. Set in CC CV mode at 48V. Extremely modular! I've been using this supplier. No disappointment so far: https://www.prodctodc.com TWO 310W panels is 66V peak power and 80V open (620W...
by Richo
Fri, 10 May 2019, 13:38
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

ONE panel with ONE boost converter might be cheaper. So the input would be 33Vpk 40V max and output set to 48V. You may need an output diode, fuse and a heat sink on each. Then ALL the panels are in parallel on the 48V line. Its the DC equivalent of the microgrid inverter system for grid feed system...
by Richo
Fri, 10 May 2019, 12:47
Forum: Renewable Energy and Storage (Non-EV)
Topic: Offgrid solar project
Replies: 53
Views: 805

Re: Offgrid solar project

Two panels in series, one voltage limiter, one DC output, for each pair, why is this not possible ? it's the same thing than many battery in parallel, no ? While each branch is protected to never run as receiver, all branch are added and giving the current that is ask by inverter, no more Two panel...
by Richo
Fri, 10 May 2019, 12:29
Forum: Technical and conversion discussion
Topic: Lead acid to lithium conversion
Replies: 65
Views: 2263

Re: Lead acid to lithium conversion

Did you try bypassing the controller and manually turn on the contactor?