No current management between MPPT / BMV?

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mikeymike asked Apr 10, '21

No current management between MPPT / BMV?

Hi,

i use a MPPT 100/50 and a BMV712 with 1,3kWp offgrid (oversized because of winter). The charger and bmv are connected via VE.Smart Networking. My MPPT output is limited to the maximum allowed battery current.

I also use energy in my regular system while charging. The bmv seems not to communicate the real charging current to the MPPT to regulate the maximum power output. So in sunny days i can´t use the full power of my pv for my phoenix ac converter because of this limitation.

Why isn´t this implemented or why is this a problem?

BMV Battery Monitor MPPT SmartSolar current limit

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Answer 1 · 2021-04-10T08:04:22Z

Stefanie (Victron Energy Staff) answered · Apr 10, 2021 at 08:04 AM

Hi @MikeyMike,

as far as I know the reason is the design. At some point VE.Smart Networking is too slow to provide current sense to the MPPT.

More on that here: Voltage, temperature and current sense

and here: Synchronised charging

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