Green Energy for heat and a/c

Ok! The batteries they're selling , are probably AGM Deep-cycle Dual-purpose Marine batteries.
I currently have 6 of them , installed on my truck. Mine are Sears Die Hard Platinum Plus . They have a 3 year no Pro Rated over the counter exchange warranty . That is why I bought them.
They cost $400.00 each. They weigh 75 lbs. each.
They are not the best available , the best weigh 80 lbs. each , cost more , and have a one year warranty.
Your idea will work , for about 10 hrs. At a time. You will probably want a Coleman , rooftop mounted haeat-ac unit. Very efficient.
Drawbacks : you will have to find a shop , that Knows their stuff , cause you'll have to have a custom Regulator , for your charging system. A Full Charge on those type batteries , is 14.2 volts , not 13.5 .
that makes a Huge difference , in the life of the batteries , also in how long they are able to run your system.
There is a place , in Oregon , I think , that can set up an alt. and regulator for you. Expect to pay about $800.00-1000.00 , for their stuff. They'll ship it to you.
And , remember , you can draw the batteries down , to about 50% , but it takes a good , long time , for them to fully recharge. They'll charge up to about 90-95% , in a couple of hours , with the right charging system , but getting them back to 100% takes awhile. Hours .
You'll want a Shoe Power setup , also, so you can plug in , whenever possible, to save battery useage . These batteries are new technology , and I'm not sure what their life cycle is now.
Figure on replacing them , every 300-500 cycles , to be on the safe side.
As of now , except for Sears , and The Battery Store , I think it is , you're not gonna be able to walk into any old place , and buy these batteries.
Youll need a Load Tester , and a quick way to disconnect each battery , so you can check them , separately , say every month. A bad one , in your bank , will considerably shorten your runtime , and the other batteries will suffer for it.
Or, you could buy an APU. Problem solved. Weight about the same.
As for the environment , its a wash. The electricity to recharge has to come from Somewhere , and that means some level of pollution.
Over the long run , unless you're a enviro nut , or never spend more than 10 hrs sitting , my opinion is , you're better off with an APU. Same job , EPA certified , weight about the same , and a whole lot less hassle and worry.

 

Do you like commas?

 

About as much as I like hare-brained questions.

 

The big problem is finding a low voltage AC system that you do not need an inverter to use. what is funny most of the cheap foreign made AC systems are low voltage internally to make them more efficient that the higher voltage is internally inverted down to operate it. I haven't found a low voltage AC unit and I believe somebody in Europe just came out with one for big trucks?

 

Dice, high voltage is inherently more efficient than low voltage because all the losses are proportional to current. The question is whether those inefficiencies are less than inverter losses.

 

Not with variable speed compressor motors that make the start up surge not so harsh on the current draw. I agree with running voltage for a long distances in wire that higher is better.

I am not an electrical expert by no means and please feel free to correct me if I misunderstand my research findings?

 

Here is a lithium ion battery in a group D size



3000 cranking amps and 300 AHs of storage for only $2999 and only weighs 93 lbs.
Link: http://www.lithiumion-batteries.com...n-batteries/12v-300ah-lithium-ion-battery.php

Here is group 31 lithium ion battery like most trucks have 4 of these in lead acid or AGMs.

1000 cranking amps with 100 AHs of storage for only $1299 and only weighs 30 lbs

Link: http://www.lithiumion-batteries.com...n-batteries/12v-100ah-lithium-ion-battery.php


You guys know what the lead acid batteries weigh each. The group D weighs around 130 lbs and the group 31 weighs about 60 lbs each.

 

You're not wrong on VSD's, Dice, you just mixing up how it works together. Just because I don't wanna type:

This basically is allowing you to power your motor continuously at average draw of a start/stop system minus the start surge, an obvious way to save power. I thought you were referring to DC driven 12V compressors, which i don't think are efficient enough to cover inverter losses to run a 120V system.

The VSD's could take a 12V input, ramp that voltage up through the inverter for motor effeciency, and end up with a more efficient system. But it's because of what happens at the high voltage VSD end that saves energy, not because of the low voltage input. I hope I was clear?

 

Well, shoot, I'm really behind the times . I wasn't aware that anyone had done a lithium-ion battery for trucks yet! And , only 4 times the cost , and a 40 lb. per battery weight savings . AH about the same as mine, though.

 

I wish trucks here in the USA were 24 volt systems instead of 12 volt. It sure would make things easier to work finding an AC system.