Calculator HP HP 300S+ Solar Powered Compact Design

HP 300S+ Solar Powered Compact Design is a scientific calculator by HP tailored for everyday calculations and educational use. It combines a compact, space-saving layout with solar power operation and a 4-line LCD capable of displaying up to 15 characters per line, enabling clear presentation of expressions and results. The device supports both basic arithmetic and an extended set of scientific functions needed for school, university and technical tasks.

Advantages

The calculator offers dual power via a solar panel for reliable operation in well-lit environments, reducing dependence on replaceable batteries. Its compact footprint and clear multi-line display make it suitable for constrained workspaces and for following multi-step calculations. Built-in scientific capabilities — including trigonometric, logarithmic, fractional and statistical functions — expand usability beyond simple arithmetic while preserving an intuitive key layout for fast entry.

Suitable for

• Basic arithmetic at home, office or shop
• School and university courses requiring scientific functions
• Technical quick calculations and field measurements in well-lit conditions

Key specifications

• Display: 4-line LCD, up to 15 characters per line
• Power source: solar panel for battery-free use in sufficient light
• Function set: addition, subtraction, multiplication, division, percentage
• Scientific functions: trigonometry, logarithms, inverse and hyperbolic functions
• Additional math features: fraction handling, fraction–decimal conversion, permutations, combinations, prime factorization
• Statistical tools: mean, sum, standard deviation, probability functions
• Other conversions: sexagesimal–decimal conversion and unit conversion support

How to use

Turn the calculator toward a light source to ensure the solar panel receives sufficient illumination. Enter numbers and operations using the clearly labelled keys; multi-line display lets you review intermediate steps before finalizing results. Use dedicated function keys to access scientific features such as trig, log, fraction or statistical modes. For chained calculations, proceed step by step and use the display to confirm each entry.

Usage recommendations

Place the calculator in direct or bright ambient light for consistent solar operation. For extended or low-light use, verify whether a backup battery is installed or available and store the device in a protective cover to avoid display scratches and key wear.