Main Fuse Size?

[PaulLad]

I assume that if my entire 48V system is wired with 12 ga wire and my largest component is a 20A CC, the main fuse (see pic) should be 20A. Is that correct? Thx!

 

[Zapper77]

What size is you inverter?

 

[Zapper77]

You should add a shunt.

 

[Zapper77]

What are the specifications of your battery?

 

[Zapper77]

I went through and read your other post about your planned system.

A 500 watt inverter is to small. I don't know how you plan on using your "emergency back system), but 500 watts is only good for 3-5 LED lights.

 

[PaulLad]

What size is you inverter?

500W/10A, How could you possibly know that the inverter is too small without knowing what devices it will be powering?

 

[PaulLad]

A 500 watt inverter is to small. I don't know how you plan on using your "emergency back system), but 500 watts is only good for 3-5 LED lights.

 

[PaulLad]

A 500 watt inverter is to small. I don't know how you plan on using your "emergency back system), but 500 watts is only good for 3-5 LED lights.

No point in wasting your time responding because after making a statement like that, I won't pay any attention to anything you say.

 

[Zapper77]

Simple.

You said it's an emergency backup. So not for a Van Build.

Why build a 48v system when your AC power needs don't exceed 500 watts.

A residential refrigerator during defrost can consume between 200-500 watts.

800 Lumen LED 5-8 watts

QC3 USB charger 20-50 watts

Laptop 40-360 watts

 

[timselectric]

I assume that if my entire 48V system is wired with 12 ga wire and my largest component is a 20A CC, the main fuse (see pic) should be 20A. Is that correct? Thx!

Yes

 

[Zapper77]

No point in wasting your time responding because after making a statement like that, I won't pay any attention to anything you say.

@SolarScott LOL...maybe we are the same.

 

[SolarScott]

@SolarScott LOL...maybe we are the same.

A spoon full of sugar helps the medicine go down, the medicine go down.......cold, hard facts are bitter tasting....

 

[PaulLad]

......cold, hard facts are bitter tasting....

You mean like this one:

500 watts is only good for 3-5 LED lights.

 

[Zapper77]

You mean like this one:

LED bulbs typically have a higher VA (volt-amps) Watts isn't the best way to measure power demands of electronics.

Additionally most inverters are rated assuming a power factor of 1. Unless you have all resistive loads your PF won't be 1. Meaning that you inverter VA rating is the actual limit.

Quick explanation if you want.

What’s The Difference Between Watts And Volt-Amperes?

Find the simple difference between watts, volts and amps, two important measurements of electricity. This article describes their definition, calculation, and application. It is your guide to understanding these steps and making wise energy choices in everyday life.

mobile.nextpcb.com

 

[Zapper77]

Back to my 500 watts is to small.

I purchased and currently own 1,000 2,000 and 3,000 watt 12v inverters. I was just trying to prevent you from making the same mistake that I did.

 

[PaulLad]

Back to my 500 watts is to small.

I purchased and currently own 1,000 2,000 and 3,000 watt 12v inverters. I was just trying to prevent you from making the same mistake that I did.

That's cool but maybe you would consider asking what I'm powering with it first. All of my big appliances will be powered with propane.

 

[fpgt72]

Back to my 500 watts is to small.

I purchased and currently own 1,000 2,000 and 3,000 watt 12v inverters. I was just trying to prevent you from making the same mistake that I did.

Been down that road as well.

Ended up giving the 1,000 to the in laws with one battery. This way they can open the garage door, (heavy old wood door and the FiL is in his late 70's) They can also use it to keep the fridge running for a while, but not at the same time.

They have smaller batteries for charging the phones and such.

 

[fpgt72]

That's cool but maybe you would consider asking what I'm powering with it first. All of my big appliances will be powered with propane.

It seems clear you know what you need then and don't need or want any advice from those that have been down that road before.

All good.

 

[PaulLad]

It seems clear you know what you need then and don't need or want any advice from those that have been down that road before.

All good.

I've had a 1000 watt inverter for 4 years. Never have used more than 200 watts.

 

[Zapper77]

I've had a 1000 watt inverter for 4 years. Never have used more than 200 watts.

Have you decided on which inverter you are going to use?