The screenshot on the left demonstrates a live scenario of panels producing 3.04 kilowatts (kW), where 0.77kW is consumed in the home and 2.27kW is exported into the grid. The battery is full, ready for the night usage again.
A 5kW inverter producing more than 5kW?
The graph demonstrates another interesting result. How is it that my 5kW inverter is producing about 6.3kW? As the battery connected is a DC DC system, the inverter is not actually required to convert panel power to 240v AC, but can simply charge the battery straight from the panel power. So here on this more cloudy day, we have the battery full by 10am!
Hybrid PV solar worthwhile? Grid with battery?
Check out my synergy history usage below for an example – you decide!
This graph has been pulled directly from my Synergy usage account. In January 2015 I installed a 5kW with 6kW of panels on my roof, grid connect only. In December 2017, I took it down and replaced it with a SolarEdge 5kW inverter and LGCHEM RESU10H battery, with a whopping 11.34kW panel power – and look how it slaughtered my grid consumption!
You’ll notice how the November/December 2017 period halved, as my I only had it up for one month in that period. It also had a great impact on my power bills: the following month, I was in credit with only a 7c/kWh feed-in tariff, which meant that I was able to export sufficient power into the grid above my consumption to wipe out the daily charge. Very pleased with the results. However, this is in the summer months, so I expect my consumption to increase in winter, as well as solar production decrease. We have a few ideas on how to combat that as well.