Should I Opt for High or Low Voltage Batteries? (Home Solar) (1 Viewer)

[EuroTrotters]

Following on from my post at the foot of this thread, I have to decide what to do?

The Installers fitted the Wrong Specification of Inverter, they fitted a Goodwe High Voltage version.

I was intending to buy the Fogstar 15kw Low Voltage Battery and bring it to Spain. But the logistics of getting it here, warranty issues and self install, I decided not to. I was then going to consider obtaining low voltage batteries here in Spain (someone linked me to a supplier but I cant find there reply).

I have finally got the installers to agree to change the inverter, leave it or have this system fitted



€6,000 for 10kw fitted.

Seems High Voltage batteries are pricier, but better performing.

Solar Power - Home UK & Spain

I wonder if some of you with knowledge or experience could look at these quotes for me please and let me know your thoughts ? I am looking at getting solar and getting a bit bogged down with it all. Thanks to MB who sent me the Solar Together, but seems Greater Manchester are still not on the...

www.motorhomefun.co.uk

 

[autorouter]

I don't know much about the high voltage batteries, but I would be wary for your setup. The HV batteries presumably need high voltage strings of solar panels. You say the panels will be split between East, South and West facing roof sections. So they may have difficulty maintaining a consistently high voltage level. The 48V battery may be better in that situation. But you'll need a different inverter - a hybrid one with a charger built in.

 

[EuroTrotters]

I don't know much about the high voltage batteries, but I would be wary for your setup. The HV batteries presumably need high voltage strings of solar panels. You say the panels will be split between East, South and West facing roof sections. So they may have difficulty maintaining a consistently high voltage level. The 48V battery may be better in that situation. But you'll need a different inverter - a hybrid one with a charger built in.

Thank you

Google is my friend for hybrid inverters

 

[Raul]

I don't know much about the high voltage batteries, but I would be wary for your setup. The HV batteries presumably need high voltage strings of solar panels. You say the panels will be split between East, South and West facing roof sections. So they may have difficulty maintaining a consistently high voltage level. The 48V battery may be better in that situation. But you'll need a different inverter - a hybrid one with a charger built in.

Good point, HV battery inverter usualy runs on string of 600-850VDC. A 48v only needs 90v to wake up the inverter, or 120v to produce power.

 

[Raul]

Deye or SunSynk is your best choice as it stands for 48v hybrid grid tied.
Victron works to, but you have to keep the existing and the victron works with it.

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[Bolti]

A 6 kW hybrid inverter can be had for less than a thousand euro

Inversor híbrido Solis 6kW 48V (S5-EH1P6K-L) | ElAlmacenFotovoltaico.com

El inversor de conexión a Red Inversor híbrido Solis 6kW 48V (S5-EH1P6K-L) puede funcionar con o sin baterías. Este inversor permite cargar una batería con el excedente de producción.

elalmacenfotovoltaico.com

5 kW Battery 1400 euro

Batería Litio Pylontech US5000 4.8kWh | ElAlmacenFotovoltaico.com

Pylontech US5000 4.8kWh,la batería de litio formada por módulos de LiFePo4 sistema de almacenamiento fotovoltaico modular y ampliable. ¡6000 ciclos de duración!

elalmacenfotovoltaico.com