Inverter power for security cameras

#81
Sounds good. Speaking from experience living off grid, you'd be much better off by boiling water with propane and using a french press for coffee. Anything that has a heating element sucks a LOT of power from your batteries. And batteries are at their lowest capacity early in the morning before the sun has come out.

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This is the kind of stuff I need to know! Thanks! And I will have propane for the water heater for shower and sink and propane for cooking, so will always have plenty there. Thanks for the insight.
 

sarco2000

Beyond the Grid
#83
Nice to know. I don't plan on that now, but a good thing to consider to run now for later.
CAT5 networking is basically dead now that wifi is king, and hard telephone lines are just about dead. I only said it so I could post some useless trivia!

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sarco2000

Beyond the Grid
#84
This is the kind of stuff I need to know! Thanks! And I will have propane for the water heater for shower and sink and propane for cooking, so will always have plenty there. Thanks for the insight.
Be careful with the water heater you pick out. I assume you're talking about an on-demand heater? Some of them use heating elements to ignite the propane. See if you can get one that doesn't need AC. Mine is a Bosch that needs no external power and I'm really happy with it.

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#85
Be careful with the water heater you pick out. I assume you're talking about an on-demand heater? Some of them use heating elements to ignite the propane. See if you can get one that doesn't need AC. Mine is a Bosch that needs no external power and I'm really happy with it.

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Yes, the one I have is an on-demand and does not require AC.
 
#87
Firstly, let me say THANKS tons for all the great helpful advice so far, I am putting it all into action. My next question is this:
I plan to ultimately have a 6 battery bank. I'll be starting with two. I plan on connecing them in parrallel, which I am told is an efficient way to arrange them. My main concern (question) is, is it safe to install them in my utility room inside the house, or would it be better to build a small storage shed for them jut outside the house? Everywhere I look is telling me all my connection should be as close to the battery as possible, so that is why I was considering placing them inside.

Thanks,
O
 

HandLoad

Yikes...
Brass Subscriber
#88
Batteries can outgas HYDROGEN + OXYGEN, at exactly the proportions for instant ignition if any spark is present. Hindenburg comes to mind.

Batteries spatter, burp, and put micro drops of Sulfuric Acid in the air. See the paint around any older car's battery area?

Then, when things go wrong in a battery box, room, or Car, there can be Electric Arcs in excess of a Thousand Amps...Welding is done at a Few Volts, and usually at less than 100 Amps.

Still want it in the next room?
 
#89
Batteries can outgas HYDROGEN + OXYGEN, at exactly the proportions for instant ignition if any spark is present. Hindenburg comes to mind.

Batteries spatter, burp, and put micro drops of Sulfuric Acid in the air. See the paint around any older car's battery area?

Then, when things go wrong in a battery box, room, or Car, there can be Electric Arcs in excess of a Thousand Amps...Welding is done at a Few Volts, and usually at less than 100 Amps.

Still want it in the next room?
Ah!!! Hell no. Separate storage shed with an interior shielding it is! Thanks.
 

HandLoad

Yikes...
Brass Subscriber
#90
Include fire suppression/CO2 extinguishers, and a battery disconnect on the outside of the nearby shed! Make shed out of Cinderbrick?
 
#91
Include fire suppression/CO2 extinguishers, and a battery disconnect on the outside of the nearby shed! Make shed out of Cinderbrick?
Alright, that is what I'll do. I'd rather go the distance and do overkill than deal with the potential consequences. Thanks
 

sarco2000

Beyond the Grid
#92
A couple other things. It really is better to plan the whole system from the beginning rather than try to add on later.

It's generally not good to mix old batteries with new. It shortens the life of the new ones.

It's generally not good to have more than 3 parallel strings of batteries. So with 6 batteries, a better configuration would be 3 parallel strings of 2 batteries that are wired in series, or 2 parallel strings of 3 batteries that are wired in series.

The final configuration will depend on what type of batteries you have.

Wired in series adds voltage, wired in parallel adds amps. So two 12V, 100AH batteries wired in parallel will provide 12V and 200AH, but the same batteries wired in series will give you 24V and 100AH.

I have (16) 6 volt batteries. There are 2 parallel strings of 6 batteries in series, making a 48 volt bank with 900+ AH.

In YOUR situation, you may want to do what I did. Which is start out with a small 12V system with 2 big, 6 volt batteries in series to run a few small things.

THEN when you want more power for the rest of the house, build a second, bigger system. This also gives you some redundancy.

My 48V system I mentioned above runs all the appliances, all the receptacles, and most of the lighting. But I started out with a 12V system which is is still in place and powers the water pump and some 12VDC lighting.
 
#93
A couple other things. It really is better to plan the whole system from the beginning rather than try to add on later.

It's generally not good to mix old batteries with new. It shortens the life of the new ones.

It's generally not good to have more than 3 parallel strings of batteries. So with 6 batteries, a better configuration would be 3 parallel strings of 2 batteries that are wired in series, or 2 parallel strings of 3 batteries that are wired in series.

The final configuration will depend on what type of batteries you have.

Wired in series adds voltage, wired in parallel adds amps. So two 12V, 100AH batteries wired in parallel will provide 12V and 200AH, but the same batteries wired in series will give you 24V and 100AH.

I have (16) 6 volt batteries. There are 2 parallel strings of 6 batteries in series, making a 48 volt bank with 900+ AH.

In YOUR situation, you may want to do what I did. Which is start out with a small 12V system with 2 big, 6 volt batteries in series to run a few small things.

THEN when you want more power for the rest of the house, build a second, bigger system. This also gives you some redundancy.

My 48V system I mentioned above runs all the appliances, all the receptacles, and most of the lighting. But I started out with a 12V system which is is still in place and powers the water pump and some 12VDC lighting.
Makes sense (now that I hear it). Tons to think about when it comes to electrical, which is my weak point in all this build. Great info, thanks.
 
#94
My main consideration is not the power when I get there, but the "running" power I have for the security cameras and a couple outside lights while I'm gone (at this point).
 
#95
AND, while I am there, I really don't anticipate a heavy load of usage, so am I over-thinking my 6 bank battery design? O would 4 work ok?
 

sarco2000

Beyond the Grid
#97
AND, while I am there, I really don't anticipate a heavy load of usage, so am I over-thinking my 6 bank battery design? O would 4 work ok?
That's not how you do it though. You first figure out how much power you need to store, then size the battery bank so that it will store that power.

( Hopefully you're not talking about using car batteries - you really should get solar type batteries.) The number of batteries is arbitrary: they come in various voltages and Amp Hour capacities. You can have a little 12V battery with 20 AH, or a huge 6V battery with 400 AH that weighs 130 pounds.

After you know how many Amp Hours you need stored in the battery bank to supply power for the number of days you want to have without charging (in case it's cloudy), THEN you start looking at batteries and the various configurations.

Going back to post #15, where 56AH will supply you with a days power for the cameras ONLY, you could bump that up to 160AH for three days power without sun.

Then go here to get an idea of what type and numbers of batteries you'd need to make a bank with that much power: https://www.solar-electric.com/residential/batteries-battery-storage/deep-cycle-batteries.html The six volt batteries are probably the most common and that's what I have. But my neighbor's battery bank is (26) 2 volt batteries, all wired in series.

If you plan on powering OTHER things with the same system, you should calculate or guess how much power those things will use per day, and add that power to the size of the future battery bank, then buy the batteries to build it.

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#98
That's not how you do it though. You first figure out how much power you need to store, then size the battery bank so that it will store that power.

( Hopefully you're not talking about using car batteries - you really should get solar type batteries.) The number of batteries is arbitrary: they come in various voltages and Amp Hour capacities. You can have a little 12V battery with 20 AH, or a huge 6V battery with 400 AH that weighs 130 pounds.

After you know how many Amp Hours you need stored in the battery bank to supply power for the number of days you want to have without charging (in case it's cloudy), THEN you start looking at batteries and the various configurations.

Going back to post #15, where 56AH will supply you with a days power for the cameras ONLY, you could bump that up to 160AH for three days power without sun.

Then go here to get an idea of what type and numbers of batteries you'd need to make a bank with that much power: https://www.solar-electric.com/residential/batteries-battery-storage/deep-cycle-batteries.html The six volt batteries are probably the most common and that's what I have. But my neighbor's battery bank is (26) 2 volt batteries, all wired in series.

If you plan on powering OTHER things with the same system, you should calculate or guess how much power those things will use per day, and add that power to the size of the future battery bank, then buy the batteries to build it.

.
Makes perfect sense. I'll do some figuring as you recommend and then get the batteries. Yes, I am planning on getting solar system batteries and not carbatteries.