We use cookies on our website.

Cookies are small text files which are stored on your computer or mobile device. They serve to make our web pages more user-friendly and to display them in an optimized manner. If you continue without changing your settings, you agree to the use of cookies.

Privacy

Homepage Solar batteries MyReserve Efficieny

MyReserve efficiency

Getting more out of each ray of sunshine

The best home battery systems for solar PV have the edge for several reasons. These include response speed and intelligent charging – and conversion rates.

Solar photovoltaic modules produce ‘direct current’ (DC) electricity, and batteries store it in DC as well. Households, however, use alternating current (AC). Discovering the reasons for this difference takes us back over 100 years – and it’s worth a read if and when you have time, but both current types have their uses, which is why each type is so widely used today!

Efficient conversion = more power

What’s important to note, however, is that for safe, effective performance, DC power must be converted to AC, a process carried out by an ‘inverter’. With conventional AC-side batteries, three conversions are required.

SOLARWATT’s multi-award-wining MyReserve is unlike other batteries as it’s installed on the DC side, storing direct current from the PV system, so only one conversion stage is required. Only when the electricity is consumed in the household is it changed to alternating current.

This makes a big difference in performance, for while ordinary batteries leave households with a conversion rate of only 75%, MyReserve produces 90% of the power generated by modules. That’s a substantial difference in performance and ultimately, cost.

MyReserve efficiency
Photovoltaic modules produce direct current (DC) and batteries store electricity in DC as well. Households, however, use alternating current (AC). The DC Power must be converted to AC power and this conversion is performed by the inverter.

Standard AC battery (upper picture):
Electricity from the roof goes through an inverter and is converted into alternating current. If it is sent to a conventional battery, it is converted back into direct current. Then as the battery discharges the current must be converted once again to alternating current. With each conversation you loose some of your precious solar power and end up with only 75 % for your own use.

MyReserve (lower picture):
Our battery is installed before the inverter. It stores the direct current from the PV system . Only when the electricity is consumed in the household, it is converted into alternating current. This leaves over 90 % of your own solar power available – that pays off.