It could be done but as others have said it's a total waste of money.

For example if common D size alkaline batteries, which hold 1.5 volts @ ~12 AH, were used to make a 12 volt 12,000 AH battery pack you would need 8000 of them which if bought in bulk and hand assembled it would still make for a $10,000+ dollar battery pack that weighs a smuch as a small vehicle.

For that money that buys a lot of extension cord or solar panels.

 

I need this to be as simple as possible for the installers. Power outlets and sun is not always available on site.

Pretty sure that unless this is a cave and miles from the surface there is enough light to keep a 12 volt 10 ah battery charged up with a 50 watt solar panel on the worst cloudy days ever.

$150 commercial deep cycle battery plus $150 commercial grade 50 watt solar panel and a $30 MPPT charge controller will keep your repeater running for years.

 

Also do SLA batteries have to be upright to prevent leaking?

The battery in my UPS committed suicide, so don't bet your life on it.
Maybe it's only one battery in a thousand that leaks. You have to consider whether you're using a thousand batteries or just one. I install them, "right side up" after my one stinky acid leak event.

 

Maybe it's only one battery in a thousand that leaks.

Where did yours leak from?

 

The battery in my UPS committed suicide, so don't bet your life on it.
Maybe it's only one battery in a thousand that leaks. You have to consider whether you're using a thousand batteries or just one. I install them, "right side up" after my one stinky acid leak event.

I've seen a few do that. Despite being suposedly sealed and universally mountable they still leaked acid out the venting port anyway.

I don't trust any supposedly sealed battery to be mounted in any position but with the cap side up. Even full on 'spill proof AGM gel based' units.

 

Where did yours leak from?

The acid sneaked out next to the terminal where you are supposed to attach a wire. It was designed as a .25" male spade connector.

 

OK. He said physical size and weight not a concern. It would take approximately 160 D size alkaline batteries to do this. While the batteries themselves could be bought for less than 200 bucks, the mounting holders would add a few hundred more to the project. Alkaline batteries also are not constant voltage over discharge life. A regulator is necessary to keep the constant output voltage. This of course is trivial at 70 ma current. Another thing to consider is these batteries tend to leak when discharged so they could give the white corrosion on the holder terminals thus ruining them. Ah! A guy with a forklift just arrived with the replacement batteries for the project! Find a wall socket and forget this.

 

It would take approximately 160 D size alkaline batteries to do this.

What math are you using to get 12 volts and 1200 amp hours out of 160 D batteries?

 

What math are you using to get 12 volts and 1200 amp hours out of 160 D batteries?

I'm glad somebody asked

 

Must be an alternate math to go along with alternate facts.