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Old 25-06-2014, 14:14   #1
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Mastervolt Mas Combi 3500

Charger operating tempersture advice.
The maximum charge rate that the unit delivers after charging for +-15minutes is only 60 to 70Amp. The unit is rated at 100Amp 12V.
When I questioned Mastervolt tech support in Netherland, the answer was that the unit reduces the output to protect itself if the ambient temp of the unit rises above 20C
The rated 100Amp output is for operating at 20C
This is pathetic. Ambient temp in the tropics is mostly above 20C!!!
Does anybody have a sugesstion how to overcome this problem?
Re programming the software, or add additional cooling? Keeping in mind that the ambient is mostly above 20C.

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Old 25-06-2014, 14:33   #2
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Re: Mastervolt Mas Combi 3500

Are your batteries depleted enough to take a higher charge current?

If so, is the charger in an enclosed area with little airflow?

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Old 26-06-2014, 04:53   #3
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Re: Mastervolt Mas Combi 3500

Yes 800ah bank down to 11.8volt.
The unit is in a ventilated compartment where the ambient temp is above 20C.

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