hybrid grid-connected system with PV and an Energy Storage System (ESS)

[Theodor]

Hello PVsyst experts,

I am working on a project that involves a hybrid grid-connected system with PV and an Energy Storage System (ESS). My goal is to simulate a scenario where the battery is charged every day at maximum capacity (one full cycle per day), with the following objectives:

1. Sell the energy generated by the PV system at a fixed tariff.
2. Sell the stored energy from the ESS according to the pricing of the day-ahead energy market.

I want to explore if adding an ESS to an existing PV system is cost-efficient, taking into account the variable market prices for electricity.

Currently, PVsyst offers three battery options: self-consumption, peak shaving, and weak grid islanding. However, none of these options seem to fit my case, where the battery would charge daily and sell energy based on market conditions.

Could you please advise on how to simulate this scenario in PVsyst, or if there's any workaround that could approximate these conditions?

Thanks for your guidance!

[sagar b]

Hi,

Your case fits the 'time shifting' strategy.

Day ahead and all these should be monitored by EMS along with BMS.

Time shifting strategy is not available in PVsyst. I think, they are working on it.

[Linda Thoren]

Hello,

In the economic evaluation, you can include hourly tariffs to assess the financial benefits of a peak shaving strategy. You can in the peak shaving strategy specify the hours when you allow for the battery to discharge and inject to the grid and calculate the revenue based on the corresponding tariff rates. However, the system does not work in reverse—economic data cannot be used as an input to control battery storage behavior.