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Battery Capacity Formula:
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The NZ Government Solar Battery Calculator helps determine the appropriate battery capacity for solar energy systems, taking into account government subsidy adjustments and New Zealand-specific efficiency factors.
The calculator uses the following equation:
Where:
Explanation: The equation calculates the battery capacity needed to store the adjusted energy load, accounting for system voltage and local efficiency factors.
Details: Accurate battery capacity calculation ensures your solar energy system can meet your energy needs while maximizing the benefits of government subsidies and accounting for local conditions.
Tips: Enter your government subsidy adjusted load in watt-hours, system voltage in volts, and the NZ efficiency factor (default is 0.85). All values must be positive numbers.
Q1: What is the Government Subsidy Adjusted Load?
A: This is your energy requirement after accounting for any government subsidies or incentives that affect your solar system's effective load.
Q2: What voltage should I use?
A: Use your solar battery system's nominal voltage (typically 12V, 24V, or 48V for residential systems).
Q3: What is the NZ Efficiency Factor?
A: This accounts for New Zealand-specific conditions like temperature variations and typical system losses. The default is 0.85 (85% efficiency).
Q4: How do I get my adjusted load value?
A: Consult your solar installer or the NZ government energy website for subsidy-adjusted load calculations.
Q5: Does this account for days of autonomy?
A: No, this calculates basic capacity. For days of autonomy, multiply the result by your desired backup days.