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Old 09-13-2016, 06:15 AM
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Originally Posted by dm1911 View Post
how long would it take for your solar panel to recharge your battery bank??


Probably a couple of days, I have twice the amount of batteries that I should have for 540 watts of solar, I bought four batteries and my brother picked up four more, he said he might as well contribute being that he's coming to my house when TSHTF.
As you can see from the earlier post, I have room for another good size panel but won't be able to add it for some time.

You was asking about wind and solar on the same system? Yes you can do that, there are controllers that will handle both, or the wind and solar can run off of separate controllers, but can still charge the same battery bank.
I'll admit, I'm not an expert on this but I have seen pictures of systems set up like this.
I'm sure there are others on this forum that can give you much more detail about it.






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Old 09-13-2016, 07:07 AM
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Originally Posted by dm1911 View Post
question if explosion of the battery ( or batteries) in a battery bank is a possible issue.

1. is there a possibility of more than one battery exploding?
2. how far away from the house would be appropriate?

in the 70's I saw a neighbor blow up a battery- I was impressed.
The focus is on venting the battery space. So there is no build-up of H2.

Another concern would be sparking. If you saw a battery explode it was likely during the sparking of jumper-cables.

In many regions, a battery-bank left outside must be vented and heated. Which means a great deal of infrastructure.
Old 09-13-2016, 07:11 AM
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how long would it take for your solar panel to recharge your battery bank??
For comparison; I have 4400 watts of photovoltaic panels, via a charge-controller feeding a 48vdc 600ah battery bank.

I can go from an 80% SOC to 99% SOC in 2 hours [if we have full sun, no clouds].
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Old 09-13-2016, 09:17 AM
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For comparison; I have 4400 watts of photovoltaic panels, via a charge-controller feeding a 48vdc 600ah battery bank.



I can go from an 80% SOC to 99% SOC in 2 hours [if we have full sun, no clouds].


That's great, I know I have overkill on batteries for the amount of solar I have, I'm beginning to see what willthtrill said about getting a charger that will quickly charge my bank up through an inverter hooked up to my vehicle. I have the gas put back so that would come in handy.
I'm planning to downsize what I was originally planning to hook up to just our medium size freezer and a small 7 cubic foot refridgerator. (Till the food runs out)


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Old 09-13-2016, 03:44 PM
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i have a couple fo walmart group 27 deep cycle batteies that i keep charged in the ham shack, they last about 5 years and need to be replaced, i dont use them much . they stay on a smart charger and are available if power is out, i can connect them to my power supply if needed and it will float charge them, i also have an1700w inverter set up with attached jumper cables , i can attack them in less than a minute and have 120 volt ac ready to run a sump pump or other device. this set up will run a 120 volt impact wrench or other tool. i have two 100 watt solar panels for charging if needed.
Old 09-15-2016, 12:28 PM
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Quote:
Originally Posted by dm1911 View Post
question if explosion of the battery ( or batteries) in a battery bank is a possible issue.

1. is there a possibility of more than one battery exploding?
2. how far away from the house would be appropriate?

in the 70's I saw a neighbor blow up a battery- I was impressed.
I've never even heard of a rumor of anyone ever experiencing an explosion from a home battery bank. It does happen very rarely with automobiles (think of the millions of vehicles on the road), but it usually takes a combination of factors to occur (i.e. electrolyte partially boiled off due to the battery being old or the alternator malfunctioning, sparks in just the right place at just the right time).

If you have a decent battery charger on your battery and/or you regularly check your batteries acid level with a battery hydrometer (you really should be), topping them off with distilled water, the likelihood of an explosion is virtually zero.

The amount of hydrogen created by charging lead acid batteries is minuscule. An airtight room with 8 foot ceilings with the floor completely covered with batteries would take over a week to build up enough hydrogen to potentially create a problem. If the room isn't airtight, the hydrogen will find the tiniest of cracks and escape quickly.

Once hydrogen is released from water, being the lightest element in the universe, it rushes straight up at 45 miles per hour to the outer reaches of our atmosphere. It doesn't linger around looking for a spark like gasoline vapors sometimes do.

All of that being said, wear safety goggles and gloves when you check your batteries' acid level, and don't connect anything to your batteries that could cause a spark (i.e. be sure devices are turned off before connecting them). A tiny bit of hydrogen can build up under the battery caps and could, theoretically, ignite if sparked in just the right way. The battery wouldn't blow up, but you could get a face full of acid, hence the protection.
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Old 09-15-2016, 12:38 PM
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Quote:
Originally Posted by TOO TALL TEX View Post
That's great, I know I have overkill on batteries for the amount of solar I have, I'm beginning to see what willthtrill said about getting a charger that will quickly charge my bank up through an inverter hooked up to my vehicle. I have the gas put back so that would come in handy.
I'm planning to downsize what I was originally planning to hook up to just our medium size freezer and a small 7 cubic foot refridgerator. (Till the food runs out)
There is no such thing as too much battery.

When you cycle batteries you want to shallow cycle and not deep cycle.
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Old 10-18-2016, 09:23 PM
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Quote:
Originally Posted by ForestBeekeeper View Post
There is no such thing as too much battery.

When you cycle batteries you want to shallow cycle and not deep cycle.
Right to the point. After a couple of overcast days in a row they'll see it...
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Old 10-18-2016, 09:54 PM
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Right to the point. After a couple of overcast days in a row they'll see it...
After a few over-cast days, you really decide what loads are vital.



Power in any 'disaster' will be difficult. I am focusing mostly on the normal routine week-long grid-down outages that we see every year.

What happens in a real 'disaster' would be something different.
Old 04-13-2017, 03:36 PM
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This thread needs some bumping.
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Old 04-13-2017, 04:15 PM
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This thread needs some bumping.
Bumping, I mean tooting, your own horn? :D
Old 04-13-2017, 09:47 PM
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Bumping, I mean tooting, your own horn? :D
This thread didn't get 110,000+ views by not being worthwhile to a lot of people.
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Old 04-13-2017, 10:00 PM
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Amen to that^^^


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Old 04-14-2017, 04:35 AM
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Originally Posted by willthrill81 View Post
This thread didn't get 110,000+ views by not being worthwhile to a lot of people.
I wasn't complaining, see at the end I was grinning? I am following the thread after all so I must like it.
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Old 04-20-2017, 08:39 PM
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Very useful information, and I apologize if this has already been answered since I didn't quite read all 24 pages...

Does the number of batteries you have connected mess with voltage of system? i.e. if you have 4 12v batteries do you end up with a 48v system? If so how does that affect everything else?

Thank yall!
Old 04-21-2017, 06:24 AM
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Quote:
Originally Posted by muhfreedom1776 View Post

Does the number of batteries you have connected mess with voltage of system? i.e. if you have 4 12v batteries do you end up with a 48v system? If so how does that affect everything else?

Thank yall!
Depends how you hook them up.

Four 12 volt batteries hooked in series is 48 volts.
Four 12 volt batteries hooked ih parallel is 12 volts.
Four 12 volt batteries hooked in series-parallel is 24 volts.
Old 04-21-2017, 07:49 AM
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Quote:
Originally Posted by jdemaris View Post
Depends how you hook them up.



Four 12 volt batteries hooked in series is 48 volts.

Four 12 volt batteries hooked ih parallel is 12 volts.

Four 12 volt batteries hooked in series-parallel is 24 volts.


Above -
1 battery +_- to -_+ to +_- to -_+ = 48
2 battery +_- on all 4 = 12
3 2 batteries +_- * 2 batteries +_- = 24

Hope that helps


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Old 04-24-2017, 08:32 AM
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