mctfopt:


I own the JK BMS with 2A balance current. Pretty nice and versatile.

A neighbour bought the 300A Daly BMS, will arrive this week.

Valto:
8pcs of brand new grade A EVE 280ah cells for sale.
Model Name:EVE
3.2V 280Ah
Internal resistance
≤0.25mΩ
4000 cycles
Weight-5.5kg.

8PCS of fairly used(still less than 80 cycles used) eve 280ah Lifepo4 Lithiums cells coupled with daly 150A bms with Bluetooth app and 3A super Capacitor 8S balancer.
whatsapp 0802-057-4628

saint2ace:
[s]2pcs used original fullriver batteries ..... 50k per piece or best price.[/s]
Used 1kva 12v Prag inverter ....... 55k
Used 2.5kva 24v prag inverter.......77k
[s]Brand new 4kva 12v standalone inverter with all accessories intact ...... 50k[/s]

All prices are slightly negotiable...... Serious buyers can contact me on zero8zero6742397zero.... WhatsApp only pls....


12v 1kva Prag inverter available

salam12:


@mctfopt Want to delve into the world of lifepo4 in nearest future. Please what is your experience so far with JK BMS with 2A balance current.
Thinking about building bank of 16S in two units (280AH 48V config), with each string hooked on to a BMS. Plan is to parallel the string to achieve 560AH 48V config.

Valto:
wow. quite huge. 16S 300A UART R485 with bluetooth app worth over 150K. daly bms is always huge and rugged. the only downside is the low balancing amp. but that can be complimented by this 3A super Capacitor balancer

olopan:
It's quite huge,

I have being having a thorough thought on

1. Balancing capability of the Daly series
2. Getting a Rs485/CAN comm via some work around to talk to inverter
3. Also ability to tweak the SOC to do local switching of loads et cetera.

If after my research the above fail to meet requirements then the expensive batrium with active community and CAN work around could be considered

But to the Daly as a balancing compliment a Deligreen 1s balancer would be a cheap way to save cost

All is a thought in process, taking it one step at a time

isangjohnson:
[quote author=Dam5reey.

Boss, I intend to use 7200wh during the day and 4800wh during the night.

I'm yet to minus 50% dod.

isangjohnson:
[quote author=Saipro.

Oga Saipro, you're in the right position to answer my questions because you used 4 PC's of 12v 200Ah batteries (48v system) with 3 or 3.5kva inverter in 2015/2016.

How have you been managing you loads then because I intend to setup a similar system?
Have you been loading your appliances while charging (with solar panels) or you've been waiting for it to be fully charged before loading?
If loaded while still charging, have you ever gotten full charge, say 52v or thereabouts?
Whatever you use to have in the evening, has it been sustaining you till the following morning?
My intending usage is:
Day consumption: 600w x 12hrs = 7200wh
Night consumption: 400 x 12hrs = 4800wh.
My system setup plan: 4 pcs of 12v 230Ah tubular battery. 48v/3.5kva inverter. 8 pcs of 320 mono panels and 48v/60A mppt charge controller.

Barezzi:
I assume all your loads are on the inverter output.
I also assume your inverter switches to "pass thru" mode when connected to the grid.

Install a suitably rated 2NC contactor on the Grid supply to the inverter.
Install a timer switch and a victron bmv700 battery monitor in series with the coil of the contactor above.
Set timer "on" time to 10am and "off" time to 4.30pm.
Set bmv700 SOC "on" to 100%(battery full) and "off" to 80%(or any level between 50% and 100% that suits your fancy)

Grid > 2NC Contactor > Inverter > Loads

Both conditions above must be met for the contactor to energize and disconnect the grid supply to your inverter.
If before 4.30pm the battery level drops below 80%, the contactor will de-energize and restore grid supply(if available) to your inverter.

A 2NC contactor is used to eliminate vampire current draw by the contactor at night when there's no solar.

Barezzi:
Alternatively, install a 2NO contactor on the output of the inverter if your loads are not normally on inverter e.g Aircon, fridges etc
Hook up a suitably rated ATS downstream of the contactor.

Inverter > 2NO Contactor > ATS < Grid

Connect your loads to the ATS.
The contactor will allow or deny inverter supply thru the ATS to your loads based on time of day and battery SOC, else they remain on the grid.

ojesymsym:
Nice idea, the only challenge with this is that if by 430pm there is no power from the utility, the loads will still keep taking power from the inverter which I do not want.


Hmmm, won't this solution still allow the inverter to be charging when there is utility during that period of the day? It think it does.

Barezzi:
You can combine both and get a PLC or node-red or discrete controls to drive all your contactors. You can even incorporate current sensors to allow grid supply or disconnect the loads if consumption exceeds a certain threshold.

Penuelseun:
Don't try microtech if your battery bank is low as it is a power guzzler, I personally use ceepro inverter, no load consumption is 8w, albeit no charger

Oshomo12:


The technology is over mature, getting old self! It is just the entering price point for us here in Nigeria, that is the problem.

You can start with Fangpusun, contact JUO for the inverter, I think he still has one for sale.

OkoroPeugeot:


How is your Ceepro?
Thinking of getting one, what sort of load can it carry?

Penuelseun:
Working perfectly, been using it for more than a year now. Use for basic loads in the house like tv, lights, sound system, 300w blender

Dam5reey:
Since will be using Solar during the day, DOD is irrelevant as you will be charging during the day and be using 4800wh in the night.

I will recommend 15KWH batteries bank preferably Lifepo4 300AH @ 51.2V

Solar 5 or 6 KWH Solar array (minimum)

Inverter 48V..

ojeysky:


I guess you meant KW

isangjohnson:
Please, I want to know if there will be any issue, if new tubular batteries are kept for long without use.