SI-80 SUMMIT Calculator

Review SUMMIT Vintage Calculator Case Untested

The Summit SI-80 is a versatile and feature-rich solar-calculator designed for solar professionals and enthusiasts. This compact, yet powerful device is engineered to provide accurate and reliable solar calculations in various applications.

The SI-80 comes with a large, backlit LCD display that ensures clear and easy-to-read readings even in low-light conditions. It offers a wide range of functions, including DC and AC system calculations, voltage and current measurements, and a built-in calculator for general mathematical functions.

One of the standout features of the SI-80 is its ability to calculate the performance of solar panels and battery systems under different environmental conditions. It can calculate the maximum power point (MPP), voltage, current, and power output of a solar panel under various irradiance and temperature levels. It also allows the user to input the temperature coefficient and other parameters to get accurate and realistic readings.

The SI-80 is equipped with a built-in temperature sensor, which can be used to measure the ambient temperature and the temperature of the solar panel or battery. This feature is particularly useful when calculating the performance of solar panels under real-world conditions, as temperature can have a significant impact on their output.

Another notable feature of the SI-80 is its ability to calculate the system voltage drop and resistance. This is useful for identifying potential issues in the wiring or electrical components of a solar system. The SI-80 also includes a DC load test function, which allows the user to simulate a load on the solar system to check its performance under different conditions.

The SI-80 is built to be rugged and durable, with a water-resistant and shock-resistant design. It runs on two AA batteries, which are included in the package. It also comes with a protective rubber case to shield it from impact and the elements.

Overall, the Summit SI-80 is a comprehensive and powerful solar calculator that offers a wide range of features and functions to help solar professionals and enthusiasts accurately and efficiently calculate the performance of their solar systems under various conditions. Its rugged design, large LCD display, and built-in temperature sensor make it a reliable and valuable tool for anyone working in the solar industry or pursuing solar projects.

The Summit SI-80 is a high-end scientific calculator designed for advanced mathematics, engineering, and scientific applications. Here are some pros and cons to help you decide if this calculator is the right choice for you:

1. Advanced Functionality: The Summit SI-80 offers a wide range of mathematical and statistical functions, including complex numbers, matrices, and statistics. It also has a built-in library of constants and units, which can save time and reduce errors.

2. Large Display: The calculator has a large, high-resolution display that can show multiple lines of text, making it easier to read complex equations and results.

3. Customizable Keypad: The keypad can be customized to suit individual preferences, allowing users to program frequently used functions to specific keys.

4. Rechargeable Battery: The Summit SI-80 has a rechargeable battery, which can be convenient for users who need to use the calculator frequently and don't want to constantly buy new batteries.

5. Durable Design: The calculator is built with high-quality materials and has a rugged design, making it durable and long-lasting.

1. Price: The Summit SI-80 is a high-end calculator, and its price reflects its advanced features and premium build quality. It may be too expensive for some users.

2. Size and Weight: The calculator is larger and heavier than some other calculators, which can make it less portable.

3. Complexity: The calculator has a steep learning curve and may be overwhelming for users who are not familiar with advanced mathematical and scientific concepts.

4. Limited Connectivity: The Summit SI-80 does not have any wireless connectivity options, which can limit its usefulness for users who need to transfer data between devices.

The Summit SI-80 is a powerful and advanced calculator that offers a wide range of features and functionality for users who need to perform complex mathematical and scientific calculations. Its large display, customizable keypad, and advanced functionality make it a great choice for engineers, scientists, and students in advanced mathematics and science courses. However, its high price, size, and weight may be a deterrent for some users. If you need a calculator for basic arithmetic and simple calculations, there are more affordable options available. But if you require advanced functionality and don't mind the investment, the Summit SI-80 is a great choice.

If you need a calculator for advanced mathematics, engineering, or scientific applications, the Summit SI-80 is a great choice. Its large display, customizable keypad, and advanced functionality make it a powerful tool for professionals and students in these fields. However, if the price is a concern, consider looking at other high-end calculators with similar functionality but lower price points. Alternatively, if you only need a calculator for basic arithmetic and simple calculations, there are more affordable options available. Ultimately, the decision depends on your specific needs and budget.

Details:

Untested comes as pictured. In used condition. Please see pics for condition. May show signs of use.

specifications vintcalc:

• brand: Summit
• mpn: Si-80
• model: Summit Si-80
• part type: Calculator Case
• vintage: Yes

shipping vintcalc:

• transit: 5-8 days
• service: usps ground advantage
• type: fixed
• carrier: usps
• class: standard

general vintcalc:

• category: Electronics > Vintage Calculators

offer vintcalc:

• in stock #: 2
• sold #: 9
• availability: in stock
• started: january 1, 2026
• prices: $24.99–$34.99
• item condition: Used
• options: ship-to-home

returns vintcalc:

• policy: no returns

payments vintcalc:

• wallet: apple-pay
• other
• credit card: diners-club

seller vintcalc:

• rating: 99.5%
• city: ogden, utah
• # reviews: 7276