Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 20,711
Of course there are AIO and AC coupled battery inverters that do use high-voltage batteries. The AIO probably have buck/boost.
I see lists of compatible batteries, but BMS & protocol not named.
Sunny Boy Storage is around $2500 for 6kW, which AC couples to GT PV. They have a hybrid (AIO) being released in June, which does not support AC coupling; it is grid-interactive and has DC coupled PV inputs. In Europe, a 3-phase hybrid up to 10kW.
Inverters like that tend to have multiple battery (and/or PV) inputs which can be of different voltages, use SMPS (MPPT) to transfer power to a different voltage capacitor bank. They could have been designed to feed AC inverter directly off whatever battery voltage, but then surge currents would come from battery (capacitors in parallel deliver power only when voltage droops.) Multiple SMPS means multiple batteries can be of different voltage, an charge/discharge currents are controlled separately (just like multiple PV arrays on their own MPPT.)
I see lists of compatible batteries, but BMS & protocol not named.
Sunny Boy Storage is around $2500 for 6kW, which AC couples to GT PV. They have a hybrid (AIO) being released in June, which does not support AC coupling; it is grid-interactive and has DC coupled PV inputs. In Europe, a 3-phase hybrid up to 10kW.
Inverters like that tend to have multiple battery (and/or PV) inputs which can be of different voltages, use SMPS (MPPT) to transfer power to a different voltage capacitor bank. They could have been designed to feed AC inverter directly off whatever battery voltage, but then surge currents would come from battery (capacitors in parallel deliver power only when voltage droops.) Multiple SMPS means multiple batteries can be of different voltage, an charge/discharge currents are controlled separately (just like multiple PV arrays on their own MPPT.)
