I have stuffed up. I need more usable amps with 24v system

[Tball]

Are you not running a 24 to 12V converter?

 

[kojak65]

i do have a 24v to 12v converter.

i was wondering if i was suppose to be running the 12v/240v fridge of the inverter

this is exactly my set up.

 

[kojak65]

This is the set up atm

 

[Forbisher]

atm i run the fridge threw 12v would it make a difference if i ran it threw the inverter? since the system is in 24v config

Powering the fridge through the inverter would use more watts as inverters are maybe 90% efficient so that would increase your consumption by 10% or more.
Your fridge runs on 12 volts and 24 volts.

 

[Forbisher]

Are you not running a 24 to 12V converter?

His fridge runs on 12 and 24 volts.

 

[kojak65]

any solutions guys?

maybe the batterys are stuffed

Im not buying another fridge. Do i add 2 more batterys in series but wouldnt that make it a 48v 100 amp system>?

 

[Ped]

Do you have the fridge now? Are you measuring its draw with a shunt based meter? Are you charging the batteries to battle borns recommend voltage?

 

[kojak65]

Do you have the fridge now? Are you measuring its draw with a shunt based meter? Are you charging the batteries to battle borns recommend voltage?

I will go pick a shunt tommrrow.

I dont have battleborns. i have solar king batterys.

Im quite angry that the specialist store didnt know what/how too mesure a dc device wattage over time (fridge). Just found it on their website in stock grrr.

 

[John Frum]

From the product link

Current Draw 1.9A-3.8A
Continuous Power 60W

That is 1440 watt hours per day and you have 2048 watt hours of capacity.
Something is fubar somehwere.

Suggest you get a shunt and make sure you know what the problem is before throwing money at new batteries.

UPDATE: it should actually be ~80/20 duty cycle once it reaches stasis so 1440*.2 = 288 watt hours per day.

 

[Ped]

I wouldnt be that optimistic but it sure will be closer to 288wh than 1440wh..

Let me say it again....because its 12v-24v the amperage will be near 2A with compressor running. Thats normal. It should run 15-20 minutes. 15w

You need to make sure youre charging batteries to 28.8v - 29.2v

 

[kojak65]

thankyou guys!

will this be appropriate https://www.jaycar.com.au/200a-dc-p...gn=redirect&utm_source=MS6192r&utm_medium=web

will fill you guys in tommorrow.

 

[Ped]

Not ideal. I dont know if its a shunt inside and it has 8awg wires, you should have double that at least. You got to answer the questions about whats going on. Is the fridge actually pulling batteries low or are you speculating? Are you charging batteries to 28.8v?

Amazon.com

 

[kojak65]

No. I dont know if its a shunt inside and it has 8awg wires. You got answer the questions about whats going on. Is the fridge actually pulling batteries low or are you speculating? Are you charging batteries to 28.8v?

Amazon.com

No. I dont know if its a shunt inside and it has 8awg wires. You got answer the questions about whats going on. Is the fridge actually pulling batteries low or are you speculating? Are you charging batteries to 28.8v?

Amazon.com

I have the fridge and a few usb power sockets connected thats it. yep fully charged is what the solar mppt display says.
could you post a australian link for the shunt.

 

[Ped]

So youre pulling batteries low? Or just think you might be off calculations from the store?

 

[kojak65]

So youre pulling batteries low? Or just think you might be off calculations from the store?

The mppt says they are less then half every morning

 

[Ped]

Thats not a monitor and is meaningless. Everyones reads that. Its says 27.1v which is full resting voltage, but you have charge going in so we cant go by that either.

Whats the voltage before sun is high enough to start charging?

 

[kojak65]

Thats not a monitor and is meaningless. Everyones reads that. Its says 27.1v which is full resting voltage, but you have charge going in so we cant go by that either.

Whats the voltage before sun is high enough to start charging?

Thats not a monitor and is meaningless. Everyones reads that. Its says 27.1v which is full resting voltage, but you have charge going in so we cant go by that either.

Whats the voltage before sun is high enough to start charging?

I have no idea. I just put the voltmeter on both batterys atm are 13v each an 26.3 together. The mppt says the same 26.3 an the battery display looks less then half its been 6hrs of night time.

so maybe the display battery is wrong. Maybe the safety settings is wrong for low voltage.

 

[John Frum]

This thread and many others like it demonstrate the value of the "non essential" bits of the system.
In this case, a shunt based battery monitor.

 

[kojak65]

This thread and many others like it demonstrate the value of the "non essential" bits of the system.
In this case, a shunt based battery monitor.

Non essential but essential Wish Mr WIll would put these in his DIY projects he has for us the website.

 

[Ped]

I have no idea. I just put the voltmeter on both batterys atm are 13v each an 26.3 together. The mppt says the same 26.3 an the battery display looks less then half its been 6hrs of night time.

so maybe the display battery is wrong. Maybe the safety settings is wrong for low voltage.

Thats perfectly normal. That can be anywhere from 40% - 90% full. When you get a monitor you will see everything is ok. You dont need more batteries.

What is your bulk voltage?