Boost Module
I keep saying the same things over and over, and nobody listens. I have done the EXACT experiment you just tried dozens of times.
The boost module has a PURPOSE. It raises the voltage coming out of the inverter to 2.5 volts OR MORE over the standing voltage of the 3rd battery. This is NECESSARY for proper charging. Without it, you will never see success. Never. Not ever. None. Zip. Zilch. Nada. As I have said dozens of times before.
As a matter of interest: Bob French lived in a small house with a solar system and ran a 3 Battery/ Inverter (solar) system for MONTHS (before he moved to Mexico) as his ONLY source if power. He could give you a real long term evaluation of the PRACTICAL uses and APPLICATION of such a system. Bob ran an inverter BETWEEN the output of the solar system and his batteries as they were charging, and then another inverter off the batteries themselves once charged. It nearly DOUBLED the amount of power (in terms of hours of actual USE) he got out of the system in a day. Previous to setting it up that way he would run out of power. After setting it up that way he never did. At least not as long as there was SUN. How do you get the output from your solar charger to be high enough to both run the inverter AND charge the batteries? You use a BOOST module to up the output voltage to give you the potential difference necessary to run the inverter, just like the 3 battery system. Which is why I brought this up in the first place.
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@Alex, above are my setup info. I did not use a booster, I wasn't necessary, because my inverter have a very low voltage limit and also because the booster add some loses in system.Originally posted by axxelxavier View PostFinally, i can present my results from 3BGS inverter test...
But first, let me remind you my setup: 3 x 40 Amp Deep Cycle bats , a HQ 300 watt inverter (low voltage limit = 9,6 volt, idle current draw - 200 mA), and the load - 3 Led Bulbs, with a 2,070 Amp current draw. The load was used only at night, for a real day-by-day use.
Total Run was 37 Hours, 07 min, Rest time was 87 hours.
Yes, batteries was rotated. If you look at the pictures, number of the batteries (upper left of the image) differ from image to image.
In fact, each images represent the stage of battery rotations.
All data was inserted in excel for precis calculation, and, of course, for the graphic representations.
First battery setup was the longest one - 13 hour 47 min, followed by the third rotation - 7 Hours, 44 min.
In the end, because the cycle time was so short (@ 30 min), I decided to drain conventionally the power left in battery 1 and 2. It was @ 30 min for each battery.
Best regards,
Teodor
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3BGS inverter tests
Hi axxelxavier,
What was your circuit setup and did you rotate the batteries?
Thanks,
Alex
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According to those numbers, my 3BGS inverter setup was nothing special, so using the batteries in 3BGS configuration or just hooking all batteries in parallel, would have the same result.
Resting time helped batteries to recover some energy, that is for sure.
It was a long test, because all reading was manually made, but I enjoy it.
Anyway, I wanted to share my result with you all.
It is time to test something different, this one was a bit disappointing...
L.E.
@Bi, I see your post now. I didn't manage to make a single post, because I can't upload all pictures together.
Yes, The results are very similar, so short say: no gain, nothing special using only the inverter, at least for my setup. Maybe somebody with bigger Trojan batteries can tell us more...
Best Regards.
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Comparison
This ^^^, compared to:Originally posted by axxelxavier View PostFinally, i can present my results from 3BGS inverter test...
But first, let me remind you my setup: 3 x 40 Amp Deep Cycle bats , a HQ 300 watt inverter (low voltage limit = 9,6 volt, idle current draw - 200 mA), and the load - 3 Led Bulbs, with a 2,070 Amp current draw. The load was used only at night, for a real day-by-day use.
Total Run was 37 Hours, 07 min, Rest time was 87 hours.
2 times 18h39m = 37h18m. Very close to 37h07m in the second test.Originally posted by axxelxavier View Post...
L.E. OK, so here are the results of second test:
40 Amp Deep Cycle Battery, discharged normally at 2,07 Amp/h down to 11,00 volt - RUN TIME: 18 Hours, 39 MIN, REST TIME: 32 Hours, 19 min Battery was used for lighting one room during night, with 3 led bulbs hooked to an inverter, so this is why it takes 4 days. In attachment, you have all the data.
It is time to start tests in 3BGS configuration + inverter, with 2 Batteries fully charged, and this depleted batt. I hope in this configuration it would last for more than 36 hours...
I'll be back with more results.
Best regards,
Teodor
Regards,
bi
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Results from 3BGS Inverter test
Finally, i can present my results from 3BGS inverter test...
But first, let me remind you my setup: 3 x 40 Amp Deep Cycle bats , a HQ 300 watt inverter (low voltage limit = 9,6 volt, idle current draw - 200 mA), and the load - 3 Led Bulbs, with a 2,070 Amp current draw. The load was used only at night, for a real day-by-day use.
Total Run was 37 Hours, 07 min, Rest time was 87 hours.
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off topic?
What do your last several posts have to do with this 3 Battery discussion?
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Thank you for your reply. I've finished my first test, discharging normally my batt down to 10,5 volt, and the results are:Originally posted by Turion View PostThese are the little lawn and garden batteries I am using for this experimenting... We just want you to know it works and there REALLY IS a “next level.”
- run time 26 hours 36 min, at 0,8 Amp load (one led bulb) and 14 hours 33 min, at 1,42 Amp load (two led bulbs)
I consider irrelevant, however, my first results. The test with one led lamp was wayyyy to long, so i tried to add a second light, to see what happens.
I am now discharging again my battery, but this time at 2,07 Amp, to fit C20 rate, and this time I will go down to only 11 volts. Because in this test I am using 3 led bulbs as my main light in dining room, during the night, it will take some time to complete the test. So far are 11 hours already gone, and I think it will last only 14-15 hours.
So my hope is that 3BGS would last for more than 30 hours, in inverter configuration with 2 batteries fully charged, and the third discharged to 11 volts.
I will repeat later test with modified motor, but the noise is a big problem in my small place, I don't think my wife and kids will be happy... I have to find a way to cancel or to attenuate the noise...
L.E. OK, so here are the results of second test:
40 Amp Deep Cycle Battery, discharged normally at 2,07 Amp/h down to 11,00 volt - RUN TIME: 18 Hours, 39 MIN, REST TIME: 32 Hours, 19 min Battery was used for lighting one room during night, with 3 led bulbs hooked to an inverter, so this is why it takes 4 days. In attachment, you have all the data.
It is time to start tests in 3BGS configuration + inverter, with 2 Batteries fully charged, and this depleted batt. I hope in this configuration it would last for more than 36 hours...
I'll be back with more results.
Best regards,
Teodor
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Batteries
These are the little lawn and garden batteries I am using for this experimenting. Generally I use them when testing a circuit so I don’t RUIN my good batteries. I have 10 of them, 2 that are Alum, and ten 6 volt deep cycle golf cart batteries.
When I get done running several charge and recharge cycles to get solid baseline data I can post all the info on the batteries and what my little Harbor Freight analyzer had to say about them. Matt has a tiny bit better battery analyzer that I’m pretty sure cost him about $3,000.00. So when he says he has analyzed a battery and knows what is going on with it, I would listen to him. (I actually thought it cost more than that, but he told me today it was $3,000.00)
I’m just testing to see how long I can run the 80 watts directly off two batteries. Then I can compare to running it on a circuit. Not sharing those results here though. We’ve given away as much as we’re prepared to and only a few are building or experimenting anyway. I will just pop in to encourage people to build the circuits we have ALREADY shown with the correct parts. They prove this is for real. Then you are on your own to experiment and take it to the next level. We just want you to know it works and there REALLY IS a “next level.”Last edited by Turion; 01-16-2019, 02:53 PM.
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Can you be more specific, please? What is the capacity of each battery?
If the load was 3 Amp, and each battery was drained to only 12,5 volt in 3 hours, I think they are at least 200 Amp/hour...
Best regards,
Teodor
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