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terrilorrain · 03-20-2025, 11:55 AM

Hello all you wonderfully helpful people!

My Victron Battery Charger has always charged my lithium battery at about 13.8 v (never more, despite some insisting it should be up around 14.4).

Today, for the first time in ten months, it is charging at under 13v.

Why?

Old-Biscuit · 03-20-2025, 01:43 PM

Which model do you have?

Does it indicate:
*Output voltage (13VDC....14VDC)
*Charge current (AMPS)
*Battery Charge Mode
*State of Charge (Bulk, Absorption, Storage)

Have you taken a voltage measurement at the batteries using a Voltmeter?

B-Man · 03-21-2025, 05:50 AM

Victron charger model ?

Battery model / capacity / chemistry ?

Do you have the Victron app loaded on your phone / tablet so you can see the actual setup of the charger?

terrilorrain · 03-21-2025, 08:08 AM

Quote:

Originally Posted by Old-Biscuit

Which model do you have?

Does it indicate:
*Output voltage (13VDC....14VDC)
*Charge current (AMPS)
*Battery Charge Mode
*State of Charge (Bulk, Absorption, Storage)

Have you taken a voltage measurement at the batteries using a Voltmeter?

I don't know the exact model. The rv tech installed it sight unseen (to me). He didn't provide me any packaging or user guide. It does include the items you listed, and "no" to your final question.

However, it has corrected itself ans everything's fine now. It's back to its usual charging voltage.

Thanks for replying - I appreciate your help. 😊

terrilorrain · 03-21-2025, 08:09 AM

Quote:

Originally Posted by B-Man

Victron charger model ?

Battery model / capacity / chemistry ?

Do you have the Victron app loaded on your phone / tablet so you can see the actual setup of the charger?

It's all good now - please see my reply to Old Biscut 👌 - and thanks!

Persistent · 03-27-2025, 08:56 PM

First, you can get a manual for your Victron from the Victron website. You will need get the complete model number from the label on the Victron.

Second, the Victron is probably not "weakening" and it has probably been working "normally" all along.

Voltage drops when the current the batteries are drawing plus house consumption exceeds the Victron capacity. This is absolutely normal and necessary.

Third, the Victron output voltage varies according to its microprocessor controls. It may never supply 14.4 volts if proper conditions are not met.

Lead acid batteries may be charged at 14.4 volts if they are deeply discharged and then only for a few hours. Longer decreases life. The Victron will not supply 14.4 volts when batteries have been charging for a long time.

The Victorn will also not supply 14.4 volts when the batteries are deeply discharged, if the current demand exceeds the Victron capacity.

It may seem complicated. Don't worry. Be happy!

terrilorrain · 03-28-2025, 06:48 AM

Quote:

Originally Posted by Persistent

First, you can get a manual for your Victron from the Victron website. You will need get the complete model number from the label on the Victron.

Second, the Victron is probably not "weakening" and it has probably been working "normally" all along.

Voltage drops when the current the batteries are drawing plus house consumption exceeds the Victron capacity. This is absolutely normal and necessary.

Third, the Victron output voltage varies according to its microprocessor controls. It may never supply 14.4 volts if proper conditions are not met.

Lead acid batteries may be charged at 14.4 volts if they are deeply discharged and then only for a few hours. Longer decreases life. The Victron will not supply 14.4 volts when batteries have been charging for a long time.

The Victorn will also not supply 14.4 volts when the batteries are deeply discharged, if the current demand exceeds the Victron capacity.

It may seem complicated. Don't worry. Be happy!

Thank you so much!