u/f22beaver

First off. Yes. I'm quite aware I can literally go spend $200 and buy exactly this same thing. But I'm bored, I'm in my mid-40's, and I'd rather "create" something.

So I'm converting a hand pump sprayer (think weeds and RoundUp) into a battery powered setup. It's going to use a 12V/5A pump.

A VERY popular thing to do in this setup is to use your 20V DeWalt/Milwaukee/Ryobi whatever battery. Then you buy a BMS and a voltage regulator and wire it up and Bob's your uncle. Fine. I get that.

My question.

Why can't I just get a 12V lawnmower battery, add a fuse, and go to town? Then put it on a tender at night? I don't need to use it more than an hour once a month or so. So if I get a 12Ah battery I can use it an hour, then I'm down to 7Ah and I'm still above my 50% target for an AGM battery. Am I thinking of this wrong? I just put a V gauge on my setup then I quit when it gets to 12V, right?

In my caveman brain this seems simpler, so I'm sure I'm missing something.

Hey, new American Standard two stage AC. Finally hot enough to use it now. When the temperature delta calls for single stage AC the outside unit will not turn on. So the fan in the house will just circulate return air.

If I kick it down far enough to get two stage to come on then everything works perfectly in. Its like a 25° drop between ambient and output so I'm comfortable the unit is working fine.

AC company checked refrigerant and will come back later today. But when he was here the other day he commented he has heard of other people with nest thermostats having trouble with first stage kicking on. We popped the cover off the other day and he thought it looked like it was wired correctly.

Has anybody here heard of this before? Something I need to do different?