Dear Zendure Users,
We know that when you're looking into energy storage products, ROI (Return on Investment) is a crucial factor you can't ignore:
"How much will this save me on my electricity bill?"
"How long will it take to pay for itself?"
"Is there a detailed and reliable calculation process?"
If you're curious about the cost-saving benefits and payback period of the SolarFlow Mix Series, this breakdown is for you!
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SolarFlow 3000 Mix AC+
—— Electricity Bill Reduction: 88%, Max. Annual Savings: €1,056, Payback Period: 2.60 years
—— Recommended for households with an annual electricity consumption of 3,000 kWh
Assumptions
■ 3 kWp PV + single unit, total cost €2,749 (€1,699 + €175 × 6)
■ Annual household demand: 3,000 kWh
■ Average German household electricity price: €0.40/kWh
■ ZenWave Dynamic Tariff: €4.99/month base fee (first year free) + €0.0159/kWh service fee + exchange price + other taxes and fees
■ 90% RTE
Original Annual Electricity Bill
■ 3,000 kWh × €0.40/kWh = €1,200/year
Annual Electricity Bill Savings
■ PV contribution: Annual power generation is 3 kWp × 800 = 2,400 kWh. If fully utilized, the electricity bill savings will be 2,400 kWh × €0.40/kWh = €960/year.
■ Dynamic tariff arbitrage contribution:
①If purchased during low-price periods at €0.20/kWh, the effective discharge cost becomes approximately (€0.20 + €0.0159) ÷ 0.9 = €0.2399/kWh.
②Compared with a fixed tariff, the saving is about €0.40 - €0.2399 = €0.1601/kWh.
③Aside from PV generation, an additional 3,000 - 2,400 = 600 kWh/year needs to be purchased from the grid, so the total savings here are 600 kWh × €0.1601/kWh = €96/year.
■ Maximum annual savings: €960 + €96 = €1,056. Compared with the original annual bill, the electricity bill reduction is approximately €1,056 ÷ €1,200 = 88%.
Payback Period
■ €2,749 ÷ €1,056 ≈ 2.60 years
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SolarFlow 4000 Mix AC+
—— Electricity Bill Reduction: 88%, Max. Annual Savings: €1,760, Payback Period: 2.13 years
—— Recommended for households with an annual electricity consumption of 5,000 kWh
Assumptions
■ 5 kWp PV + single unit, total cost €3,749 (€1,999 + €175 × 10)
■ Annual household demand: 5,000 kWh
■ Average German household electricity price: €0.40/kWh
■ ZenWave Dynamic Tariff: €4.99/month base fee (first year free) + €0.0159/kWh service fee + exchange price + other taxes and fees
■ 90% RTE
Original Annual Electricity Bill
■ 5,000 kWh × €0.40/kWh = €2,000/year
Annual Electricity Bill Savings
■ PV contribution: Annual power generation is 5 kWp × 800 = 4,000 kWh. If fully utilized, the electricity bill savings will be 4,000 kWh × €0.40/kWh = €1,600/year.
■ Dynamic tariff arbitrage contribution:
① If purchased during low-price periods at €0.20/kWh, the effective discharge cost becomes approximately (€0.20 + €0.0159) ÷ 0.90 = €0.2399/kWh.
② Compared with a fixed tariff, the saving is about €0.40 - €0.2399 = €0.1601/kWh.
③ Aside from PV generation, an additional 5,000 - 4,000 = 1,000 kWh/year needs to be purchased from the grid, so the total savings here are 1,000 kWh × €0.1601/kWh = €160/year.
■ Maximum annual savings: €1,600 + €160 = €1,760. Compared with the original annual bill, the electricity bill reduction is approximately €1,760 ÷ €2,000 = 88%.
Payback Period
■ €3,749 ÷ €1,760 ≈ 2.13 years
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SolarFlow 4000 Mix Pro
—— Electricity Bill Reduction: 91%, Max. Annual Savings: €2,560, Payback Period: 2.03 years
—— Recommended for households with an annual electricity consumption of 7,000 kWh
Assumptions
■ 8 kWp PV + single unit, total cost €5,199 (€2,399 + €175 × 16)
■ Annual household demand: 7,000 kWh
■ Average German household electricity price: €0.40/kWh (Note: This scenario does not include dynamic-pricing arbitrage)
Original Annual Electricity Bill
■ 7,000 kWh × €0.40/kWh = €2,800/year
Annual Electricity Bill Savings
■ PV contribution: Annual power generation is 8 kWp × 800 = 6,400 kWh. If fully utilized, the electricity bill savings will be 6,400 kWh × €0.40/kWh = €2,560/year.
■ Maximum annual savings are €2,560. Compared with the original annual bill, the electricity bill reduction is approximately €2,560 ÷ €2,800 ≈ 91%.
Payback Period
■ €5,199 ÷ €2,560 ≈ 2.03 years
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❓️ Based on the calculation logic above and your own household's energy consumption, how much could the SolarFlow Mix Series save you?
Share your thoughts with us in the comments below!
Wishing you a day full of sunshine! ☀️
Your Zendure Team
