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maringotka avatar image
maringotka asked

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 avatar image maringotka commented ·
Trying to add information about the batteries

Tried twice

I hope the information is there


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maringotka avatar image maringotka maringotka commented ·
Here’s the battery information again:

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




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kevgermany avatar image kevgermany ♦♦ maringotka commented ·

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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4 Answers
maringotka avatar image
maringotka answered ·

What battery monitor is needed.

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kevgermany avatar image kevgermany ♦♦ commented ·
It will work fine without one, but a good starting point is the BMV 712
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maringotka avatar image
maringotka answered ·

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


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kevgermany avatar image kevgermany ♦♦ commented ·
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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maringotka avatar image
maringotka answered ·

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

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maringotka avatar image maringotka commented ·
Lynx Distrbutor is a Victron product.


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kevgermany avatar image
kevgermany answered ·

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

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