Possible to run common agm mobility scooter charger from a 12 to 120 Inverter in auto?

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intera
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I have searched the forums for a definitive answer as to the possibly of using my switching mobility charger (120 ac to 24v agm charger) plugged into a non sine wave inverter. I have found a 12 to 24 charger but am trying to accomplish without spending if possible since this would be a rarely used option.

Thanks for a great forum from a long time reader and first time poster.

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Rob n North Austion

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intera
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Re: Possible to run common agm mobility scooter charger from ...

I can't believe no one has answered this? Will a switching power supply ( 24 v battery charger) work plugged into a small stepped mode 12 to 110 inverter?

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Rob n North Austion

antiscab
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Re: Possible to run common agm mobility scooter charger from ...

pure square wave should be fine, the charger rectifies it back to DC anyway

modified square wave or modified sine wave is hard on the input caps, if all you can find is one of those, than bridge the internal DC bus of the charger and inverter.

Matt

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Daily Ride:
2007 Vectrix, modified with 42 x Thundersky 60Ah
Vectrix 60Ah Lithium Tyres Fuel Registration Insurance cycle analyst replacement TC Charger
conversion
Spent so far: $5800 + $7000 + $1720 + $960 + $320 + $720 + $140 + $600
Cost to do it again: $2500 + $5600 + $1720 + $960 + $320 + $720 + $140 + $600
Cost for a Petrol bike:$6000 + + $1440 + $6000 + $800 + $1400 + $3200 servicing
Total spent: $17260
Total to do again: $12560
Total to have used a petrol bike: $18840
Total distance travelled so far: 79'120km

intera
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Points: 5
Re: Possible to run common agm mobility scooter charger from ...

antiscab wrote:

pure square wave should be fine, the charger rectifies it back to DC anyway

modified square wave or modified sine wave is hard on the input caps, if all you can find is one of those, than bridge the internal DC bus of the charger and inverter.

Matt

Matt I am assuming you mean only the (-) Buss since the Input of the inverter is 12v and the output of the charger is 24. Can you point me to any website that has experimented with this?
Thanks again!

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Rob n North Austion

antiscab
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Joined: 07/07/2007
Points: 1599
Re: Possible to run common agm mobility scooter charger from ...

intera wrote:
antiscab wrote:

pure square wave should be fine, the charger rectifies it back to DC anyway

modified square wave or modified sine wave is hard on the input caps, if all you can find is one of those, than bridge the internal DC bus of the charger and inverter.

Matt

Matt I am assuming you mean only the (-) Buss since the Input of the inverter is 12v and the output of the charger is 24. Can you point me to any website that has experimented with this?
Thanks again!

Nope,
cheap inverters generally work like this:

12v in
dc-dc boost up to 170vdc
H bridge to convert it to 120vac

cheap chargers work like this:
120vac in
rectified to 170vdc
buck converted down to whatever voltage you want (~24vdc in your case)

I'm just talking about bridging the two 170vdc busses, and skipping the AC part

Matt

__________________

Daily Ride:
2007 Vectrix, modified with 42 x Thundersky 60Ah
Vectrix 60Ah Lithium Tyres Fuel Registration Insurance cycle analyst replacement TC Charger
conversion
Spent so far: $5800 + $7000 + $1720 + $960 + $320 + $720 + $140 + $600
Cost to do it again: $2500 + $5600 + $1720 + $960 + $320 + $720 + $140 + $600
Cost for a Petrol bike:$6000 + + $1440 + $6000 + $800 + $1400 + $3200 servicing
Total spent: $17260
Total to do again: $12560
Total to have used a petrol bike: $18840
Total distance travelled so far: 79'120km

intera
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Joined: 06/14/2012
Points: 5
Re: Possible to run common agm mobility scooter charger from ...

This is why this website is so great. Thanks Matt as you have given me the starting point to learn how to build what I need without either paying a crazy price or bricking something needlessly. Thanks,
Rob

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Rob n North Austion

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