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Old 02-08-2019, 01:17 PM   #1
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Victron 3000 watt Inverter Charger

Hello - I'm new to this site and will be installing a solar system to my coach soon. Just doing my research now.

Can anyone tell me how long it takes for a Victron 3000 inverter/charger to charge your batteries from shore or generator power? I'll be installing solar panels but I want to check worse case scenario - no solar input.

Thanks

Ron
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Old 02-08-2019, 01:40 PM   #2
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Depends on your battery bank size...how many amp hours? Divide that by the charge rate and youíll end up with a maximum time to recharge.

Pretty sure itís 120 Amps for a 12/3000 multiplus but Iíve slept since I specíd all of that out.
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Old 02-08-2019, 01:57 PM   #3
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Thanks Freqz - that's the part I didn't know....how many amps it sent to the batteries.
Have a great day. I appreciate your help.
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Old 02-08-2019, 02:07 PM   #4
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Unless you have lithums, Your Victron will start off at higher bulk charge rate, depending on your batteries, then drop down to a lower absorption rate for a period, then finally to float. So until you get your batteries, you will not know the actual time, or current actually used to charge to 100%
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Old 02-08-2019, 02:08 PM   #5
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No worries. Itís listed on the data sheet on victronís website.

I have the 24/3000/120-70 version and itís awesome...I can run the AC, water heater and coffee pot at one time on a 30 amp connection.
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Old 02-09-2019, 07:11 AM   #6
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Quote:
Originally Posted by ronwakefield View Post
Can anyone tell me how long it takes for a Victron 3000 inverter/charger to charge your batteries from shore or generator power?

That's an impossible question to answer because there are so many variables, such as:


How deeply discharged are they?
How old are your batteries (batteries loose capacity as they age)?
How big is the battery bank?


Get the Victron BMV-712 so you can monitor your battery charge level.
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Old 02-10-2019, 01:36 AM   #7
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Quote:
Originally Posted by jcussen View Post
Unless you have lithums, Your Victron will start off at higher bulk charge rate, depending on your batteries, then drop down to a lower absorption rate for a period, then finally to float. So until you get your batteries, you will not know the actual time, or current actually used to charge to 100%
Right. It depends on your battery type and how many amps you need to put back in from the night before. Also on how good a battery charging converter your have. And if you don't have lithiums, your charge rate will gradually go down.

If you don't have lithiums, you are only going to charge your batteries to about 90% full, because it will be trickle charge after that. I don't have a new Victron, but I guess if you use about 100 amps the night before, and you expect a cloudy day, you will run your generator in the morning about an hour and a half to get up to 90% full. Then let the solar do whatever it can after that.
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Old 02-11-2019, 04:26 AM   #8
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Thanks for your help.
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Old 02-20-2019, 12:19 PM   #9
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Thanks Freqz. I don't plan to try and run my AC off the inverter but I was planning to run my microwave and various outlets in the coach. I had never thought about running the water heater through the inverter. So, that's not a problem for you?

How many solar panels and batteries are you using?

Thanks again.

Ron
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Old 02-20-2019, 12:24 PM   #10
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Freqz - two more questions...please. What size breaker do you have on your main control panel that leads to your inverter? Also, do you remember what gauge wire you used?

Have a great day.

Ron
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Old 02-20-2019, 12:44 PM   #11
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Victron 3000 watt Inverter Charger

Quote:
Originally Posted by ronwakefield View Post
Freqz - two more questions...please. What size breaker do you have on your main control panel that leads to your inverter? Also, do you remember what gauge wire you used?

Have a great day.

Ron


30 amp on the shore power side of the inverter, 50 amp on the trailer side.

The 50 amp is the main breaker on a new panel in my pass through that currently has 1 30 amp breaker feeding the original panel and 1 20 amp for the AC with space for one more circuit. (A second AC is the plan)

1000W of solar, 400 A-hr lithium @ nominally 24V. Iím still sorting out the self consumption solar details in the Victron.
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Old 02-20-2019, 12:56 PM   #12
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Ron,
There are two main factors that determine the charge rate. The first is the maximum the 12 volt converter/charger can deliver. Apparently that is 120 amps for yours. The second is the batteries themselves. A higher capacity battery bank can absorb at a higher rate, but that ability to absorb will decrease a lot as the level of charge increases.
Assuming no other 12 volt devices are drawing power and your battery bank is discharged to say 10%, the rate may be 120 amps. A 360 amp hour bank may absorb 120 amps and theoretically take 1 hour to reach 40% charge. However, as it charges, at some point the charge rate will drop below 120 amps because the batteries will start limiting the rate. So if you start at battery level of 40%, the charge rate will probably be much less than 120 amps.
For this reason, we cannot tell exactly how long it will take. We can make a wild guess that it will take twice as long to charge the next 40% to bring them up to 80% regardless of the converter/charger high maximum capacity. The battery manufactures have probably tested this and you may be able to find it on the battery manufactures website.
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Old 02-20-2019, 01:06 PM   #13
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Thanks Freqz
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Old 02-20-2019, 01:07 PM   #14
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Thank you.
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