What size MPPT charge controller for these batteries?

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maringotka asked Mar 6, '22

What size MPPT charge controller for these batteries?

What size MPPT charge controller for :8-90 watt Zamp 19.1 volt 4.7 amp panels in series/parallel. Four strings of two panels. String volts=19.1x2=38.2 volts. System : 4.712x4=18.84amps

With: 3-Ampre Time 12 volt 300 Ah LiFePo built in 200A BMS.

Plan to add one additional string.

Which Victron MPPT Controller?

charge controller compatibility

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maringotka commented · Mar 06, 2022 at 02:54 PM

Trying to add information about the batteries

Tried twice

I hope the information is there

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maringotka maringotka commented · Mar 06, 2022 at 02:58 PM

Here’s the battery information again:

3- AmpreTime 300Ah LiFePo batteries with built-in 200A BMS

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kevgermany ♦♦ maringotka commented · Mar 06, 2022 at 03:42 PM

Assuming the batteries are parallel and thus a 12V bank, you have about 60A max going into the batteries. A single 100/50 would cover this, charging at 14.4V. Which would bring the current close to the 50Amps limit of the controller. An alternative would be two 100/30s.

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Modifications Space

Node Red Space

Answer 1 · 2022-03-06T19:50:38Z

maringotka answered · Mar 06, 2022 at 07:50 PM

What battery monitor is needed.

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kevgermany ♦♦ commented · Mar 06, 2022 at 08:39 PM

It will work fine without one, but a good starting point is the BMV 712

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Answer 2 · 2022-03-06T19:52:00Z

maringotka answered · Mar 06, 2022 at 07:52 PM

Can you provide settings for a novice to program he charge controller?

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kevgermany ♦♦ commented · Mar 06, 2022 at 08:37 PM

If you install the victron connect app and select demo library you'll, be able to find the controllers and their settings. The values you need come from the battery suppliers.

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Answer 3 · 2022-03-06T20:09:14Z

maringotka answered · Mar 06, 2022 at 08:09 PM

I read somewhere that each battery should have its own breaker. Does the Lynx Distributor address this need?

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maringotka commented · Mar 06, 2022 at 09:17 PM

Lynx Distrbutor is a Victron product.

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Answer 4 · 2022-03-06T20:38:31Z

kevgermany answered · Mar 06, 2022 at 08:38 PM

It's not necessary. One for the whole bank is enough. I have no knowledge of Lynx.

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