太阳能技术一般包含光热和光电运用。太阳能光伏技术运用太阳能电池的光电效应将太阳辐射直接转化为电能并以电的方法加以运用，而光热技术则运用各种方法的集热技术将太阳辐射搜集和储存为热能。太阳能热技术直接运用的太阳辐射的能量方法是热能，可用于太阳能热技术、蓄热技术的技术实施和工程运用中的供热、制冷、空调、热电等。技术学不仅是太阳能热运用的必要组成部分，并且是一种独立存在和开展的特别技术，在工程技术范畴占有重要位置，运用广泛。太阳能蓄热器的节能运用得到了广泛的选用和开展，是一种高效、环保的节能技术措施。太阳能蓄热技术潜力巨大，许多工程技术作为节能环保措施逐步开发运用。
grid-connection: according to whether the photovoltaic system is allowed to send power to the high-voltage power grid through the transformer in the power supply area, grid-connection mode can be divided into reverse-flow mode and non-reverse-flow mode. The grid-connection shall guarantee the power quality, including voltage deviation, frequency, harmonic and waveform distortion, power factor, voltage unbalance, dc component, etc. Grid connection shall be provided with safety protection, including: over/under voltage, over/under frequency, anti-island effect, restoration of grid connection, lightning protection and grounding, short circuit protection, isolation and switching, reverse power protection.
When the pv system is absorbed into the grid, the pv system must be disconnected from the grid within the specified time limit to prevent island effect. At least one active and passive island effect protection should be provided. Active island effect protection mainly includes frequency shift, active power variation, reactive power variation and impedance variation caused by current pulse injection. Passive island effect protection mainly includes voltage phase jitter, three-time harmonic variation and frequency variation. When the grid loses voltage, the island effect protection should be operated within 2s to disconnect the pv system from the grid.
Correct battery charge and discharge. In the battery charge, discharge, the concept of quantity, charge and discharge should be appropriate, to eliminate discharge (electricity) uncontrolled, unlimited charging phenomenon. When the battery is full, stop it in time to reduce unnecessary wear of the main engine; In case of high wind, the machine should be stopped in time (20m/s is usually defined as the wind speed of stop) to avoid damage to the main engine. To add or replace electrical appliances, check their electrical suppression to avoid voltage mismatch and damage electrical appliances.
