Every kWh fed-back to the grid is erroneously counted as energy used, and will be charged for.įeed-in of PV power via an MPPT Solar Charger can be enabled or disabled in the Energy Storage Systems menu on the CCGX. It is, however, an ecologically-sound power-contributionįeed-in is absolutely not tolerated - even for a few seconds: there are certain prepaid meters in South-Africa that will disconnect from the grid when they detect Feed-in.įeeding-in results in inflated bills because the electricity meter can only count in one direction - up. This will lead to a much more stable system.Įnergy can be sold back to the grid- or to reduce the electricity bill by running in reverse.įeed-in is allowed, but not rewarded: All energy being fed back is lost in the sense that the utility provider will not pay for you it. In the case of 'no Feed-in' consider using an MPPT Solar Charger - or otherwise a Fronius PV Inverter, and then use the Zero Feed-in function. After (very efficient) conversion to AC, the PV energy is used directly by the air-conditioning unit. When most of the energy consumption takes place during the day - say in an office with air-conditioning - a grid-tie inverter will be more efficient. This will be even more noticeable when the energy consumption takes place mainly in the mornings and the evenings. The reason for this is that an MPPT Solar Charger is up to 99% efficient …whereas the PV energy coming from a grid-tie inverter is first converted from DC to AC, and then back from AC to DC, causing losses up to 20 or 30%. Generally speaking the MPPT Solar Charger will be more effective than a grid-tie inverter in a small system. MPPT Solar Charger and/or Grid-tie inverterĮSS can work with either an MPPT Solar Charger or a grid-tie inverter, and a mix of both. Q14: Why does my split and 3 phase ESS VRM data not match my billing?Ģ.1.1. Q13: Can I use ESS in a vehicle or a boat? Q11: My battery is first discharging, and then charged every night? Q10:Why does the system refuse to discharge my battery? Q9: Why are my loads powered by the grid instead of battery or solar? Q8: My system switches off in overload - why is this? Q7: How do the charge states work in ESS? Q6: Optimize mode, no feed-in: The AC Input current fluctuates wildly - sometimes even going negative. Q5: How can I suppress low battery warnings? Q4: Why is the VE.Bus state in pass-through? Q3: Even when the battery is full, the system is still connected to AC-in
Q2: I've enabled optimize mode, but do not see grid-power being used to charge the battery Q1: Is power from MPPT used to power the loads when feedback is disabled? Step 8 - Connect all communication cables
Step 7 - Configure the inverter/charger(s) Step 6 - Set up parallel and/or 3 phase inverter/chargers
Solar system designer update#
Step 5 - Update firmware of all equipment Step 1 - Understand how a Victron Energy ESS system works Multiphase regulation - further information Settings -> System setup -> AC Input types Minimum Discharge SoC (unless grid fails) Grid-tie inverter in parallel or on AC out? MPPT Solar Charger and/or Grid-tie inverter Let's look at the following example-installations: Original/Initial Tesla design had a few more panels up on the North side of roof, with some random gaps on the South side.
Our usage is also higher now with an EV (May-present) so can't tell if this is the right setup for us, but definitely want to have over 100% offset if we can The offset looks high with Tesla, but other companies quoted >13kW to be about 110% offset for us.
Solar system designer install#
Plan to install a powerwall or 2, simply because we'll probably regret it later down the line if we don't get anything nowīased on my bill, I had other solar companies quote that I'll need over 13kW panels, so I'm going with the 14.4 with Tesla.
Solar system designer full#
Can't tell when we get full sun on either sides Located in Southern California, larger side of roof is North facing, smaller side where most panels are, is South facingīasically no trees or any other shade. Hi everyone! Thoughts/advice on the system design?
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