Portable power stations for garden offices

These examples use assumed running powers and do not describe a particular product. Check appliance labels and manufacturer documents.

A rough runtime method is usable battery Wh divided by the appliance load in watts. It is only a starting point: conversion efficiency, standby consumption, temperature, battery reserve and load variation reduce real runtime. Check a desktop or gaming setup in the computer solar calculator before comparing power stations.

• For lighting and charging: focus on low standby draw, sufficient usable energy and convenient low-power outputs.
• For a daily office: plan enough energy for the whole workday plus reserve, then check whether solar can restore it under realistic conditions.
• For tools: check continuous and start-up demand from rating plates; do not assume a high-capacity battery has a high-output inverter.
• For occasional backup: identify the essential loads and required hours rather than attempting to run every appliance.

Read the broader garden-office solar guide or compare an integrated unit with a component-based off-grid shed kit.

A panel's rated watts are measured under standard test conditions. Real charging falls with cloud, shade, poor orientation, low winter sun and system losses. The station may also cap solar input below the panel array's headline rating.

Position panels away from shade cast by the office, trees and fences, and secure them for the location. In winter, reduce loads, start with more stored energy or provide a manufacturer-approved alternative charging route. The PlugInSolarCheck calculator can illustrate broad UK solar variability, but its household savings result is not a power-station runtime forecast.

A 1,500 W heater uses 1,500 Wh in an hour and demands 1,500 W from the inverter while running. A 2,000 W kettle for six minutes uses about 200 Wh, but still needs roughly 2,000 W of instantaneous output. Many small office loads together use less power than either appliance.

Improve insulation first and treat electric heating as a separate design decision. Never assume a marketing term such as “high power” means a station can safely supply a specific heater, kettle or tool.

• Follow the manufacturer's charging, ventilation, temperature, moisture, storage and load instructions.
• Do not cover the unit or place it where exits are obstructed.
• Stop using damaged, swollen, leaking, recalled or unusually hot equipment and follow manufacturer/emergency guidance.
• Protect leads from water, doors, tools and trip damage; do not daisy-chain adaptors or improvise connectors.
• Use a competent electrician for fixed sockets or lighting. A portable station should supply suitable appliances through its intended outlets only.
• Never connect the AC output to a household socket, consumer unit or generator changeover arrangement unless a competent professional has designed an approved system for that purpose.

See the product-types guide and current UK plug-in solar guide for the category distinction.