About to purchase an inverter to go with my batteries and panels and I'm looking for support

[geornicus]

Hello, I have eight 50Ah Lifepo4 batteries and nine 335W panels. I'd like to make an off grid setup to use day to day to save on electricity but also to have for power outages. I'll figure out how to mount the panels, but I wanted to post my plan on here to see if y'all can help me find out if I'm pointed in the right direction. I'm currently planning on getting the eg4 3k (you know the yellow one). I've already looked up how to wire the batteries for 48V. Id like to get the 6000xp because then I could run my central AC with that, but I've decided that that's a bit much and I like the price point of the 3k inverter. I'm thinking I could plug my fridge and a few other things to the inverter to lower my bill. How does this all sound to y'all? I already checked and the batteries are okay to be hooked up to get 48V. I guess if need a battery balancer? I got the panels for free and I paid $20 each for the batteries! If I did get the 6000xp do you think the eight 50Ah batteries would be up to the task of powering a 3 ton central AC? Would they be up to the task of powering a modern fridge and a small window unit around the clock? Thank you for considering!

 

[glandpuck]

Hold on partner!. Your battery power is shall I say, miniscule?

Your battery bank has a capacity of 2400 watts. Divide this by 120 volts AC and you have 20 amps of power. this is enough to power a counter top deep fryer for 1 hour to make fries. No more. So forget about your central air and stick to the 3000 w inverter to start.

A 3 ton unit is 36,000 BTU's. way to big for your system.

 

[geornicus]

Hold on partner!. Your battery power is shall I say, miniscule?

Your battery bank has a capacity of 2400 watts. Divide this by 120 volts AC and you have 20 amps of power. this is enough to power a counter top deep fryer for 1 hour to make fries. No more. So forget about your central air and stick to the 3000 w inverter to start.

A 3 ton unit is 36,000 BTU's. way to big for your system.

Much obliged. I'm from a big city in TX, but we do still actually say y'all. Thank you for the informed response. I'm looking forward to getting the 3k. At least on a sunny day it will be able to pass through to power a window unit that draws around 1,000 watts, surely right? Well I did the math and I guess that's about exactly how much it will be able to power. Hmm! I have a window unit I installed in my garage.

 

[740GLE]

Do you know if your batteries are able to be configured in a 4s 48v system?

Many cheap small batteries BMS can’t support 48v configurations.

 

[glandpuck]

Much obliged. I'm from a big city in TX, but we do still actually say y'all. Thank you for the informed response. I'm looking forward to getting the 3k. At least on a sunny day it will be able to pass through to power a window unit that draws around 1,000 watts, surely right? Well I did the math and I guess that's about exactly how much it will be able to power. Hmm! I have a window unit I installed in my garage.

Your system will keep lights on, run a fan and probably keep your internet up and running for a while, but not much else.

 

[geornicus]

Your system will keep lights on, run a fan and probably keep your internet up and running for a while, but not much else.

I'm pivoting to the goal of installing the panels on the roof and using a solar edge grid tied inverter I already have (5k I believe). I have the optimizers for the panels as well. I would like to install them myself and I have the expertise. Right now I'm thinking I'll use iron ridge racking. I even have a certified electrician friend. I made a little progress with the permitting today, which had been my main obstacle. I need to have the structural integrity of the roof signed off by a structural engineer as part of the permitting process. I can address emergency power another way...I appreciate your replies.