Milwaukee M18 Dual Bay Simultaneous Super Charger (48-59-1815) from US 110V-127V to EU 220V-230V

I am looking for assistance in converting a Milwaukee M18 Dual Bay Simultaneous Super Charger (48-59-1815) from US 110V-127V to EU 220V-230V power.

I have identified a TVR10511 varistor, which appears to be rated for 320V. Based on this rating, it should be sufficient for the conversion—can you confirm if this is correct? The only visible varistor is a yellow one, while the larger green component—which also appears to be a varistor—is almost entirely embedded in thermoglue, making it difficult to inspect.

Additionally, I am unsure where to modify the circuit on the board or if there is a specific link that needs to be removed.

Has anyone successfully completed this conversion? Any guidance would be greatly appreciated.

The simplest form of matching is to use an autotransformer between the 230VAC mains and the charger. Reading the user's entry, I come to the conclusion that messing around with this charger may be beyond his capabilities, and also the charger's main transformer does not necessarily have to have dual voltage windings on the primary side. Nowadays, every 10 cents in production is a glutton for the manufacturer's ,,counting group"... . And copper is expensive.

Such a charger usually consists of a power supply and the electronics supplied by this power supply. Maybe this topic will help to solve the problem https://www.elektroda.pl/rtvforum/topic4095841.html#21407644

modziul wrote:

A charger like this usually consists of a power supply and electronics powered by that power supply. Maybe this topic will help to solve the problem https://www.elektroda.pl/rtvforum/topic4095841.html#21407644

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It would be nice if you read both problems first, as they are diametrically opposed!
1) in the opening post we are talking about a 120VAC power supply and the possibility of the charger being powered by 230VAC,
2) you used a 12VDC power tool battery charger supplying an additional 24VDC power supply to the regulator/charger circuit.
Can you see the difference?

Thank you, SQ5AZP.

From what I have learned about various Milwaukee chargers, many of them are originally designed for dual voltage 110v/220V, and only a small modification is typically required to make them compatible with 220v. So far, I have successfully converted the following models:

M18 & M12 Rapid Charger (48-59-1808)
M18 & M12 Multi-Voltage Charger (48-59-1812)
M18 & M12 Charge Station (???), 3x M18/3x M12

I appreciate that Milwaukee designs these chargers with voltage adaptability in mind for different markets, as well as for their tools.

However, I am currently struggling to identify the correct modification point on the M18 Dual Bay Rapid Charger. If anyone has insights on where to make the necessary changes, I would appreciate any guidance.

>>21476794 It's just that if it can be supplied with 24V then and from 230V completely bypassing the power supply for 110V,

>>21476824 But do you have any training in electronics? Because somehow it looks shady. Not every charger is multi-stage and has two stabilisers - because that costs money. Nowadays most have a dedicated pentawatt type circuit containing a power stage and it does all the work for the batteries of the specified type i.e. controls the charge current and maximum charge voltage a simple circuit on the secondary takes care of disconnecting the charge at the end of the cycle. With lithium-ion cells, this is handled by the BMS.
For the amateur, the best solution is to use a 100 watt autotransformer. Link .

SQ5AZP wrote:

>>21476824 But do you have any training in electronics? Because somehow it looks shady. Not every charger is multi-stage and has two stabilisers - because that costs money. Nowadays most have a dedicated pentawatt type circuit containing a power stage and it does all the work for the batteries of the specified type i.e. controls the charge current and maximum charge voltage a simple circuit on the secondary takes care of disconnecting the charge at the end of the cycle. With lithium-ion cells, this is handled by the BMS.
For the amateur, the best solution is to use a 100 watt autotransformer. Link

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Do I mention anything about the charger ? The charger is a separate DC powered component from the power supply and the BMS is something to protect the battery in case the charger fails !!!!!!!!!!!!

Added after 20 [minutes]:

A rather dull topic because at this price it's a shame to bother with modifications https://blow.pl/produkty/przetwornica-napiecia-230v-na-110v-100w-d-2908/
100W is probably enough.

The conclusion is one - you don't really know what you are writing about! The BMS module works in both directions. And you, as I see it, have a genuine desire to write a colleague you are advising a new LVD and EMC declaration for this charger. The change you are trying to "advise" is, according to these regulations, a "significant interference" in the system and requires a new CE declaration!

SQ5AZP wrote:

The conclusion is one - you don't really know what you are writing about! The BMS module works in both directions. And you, as I see it, have a sincere desire to write a colleague whom you are advising a new LVD and EMC declaration for this charger. The change you are trying to "advise" is in terms of these regulations a "significant interference" in the system and requires a new CE declaration!

I am only writing how to possibly convert this charger to 230V. If I use a CE-compliant 230V power supply connected to a CE-compliant charger then I guess everything is in the standard ?????