Planning solar backup for load-shedding

Start with the interruption, not the product

A useful backup plan begins with what happens when the grid disappears. Decide which activities must continue, which can pause and who will operate the system. A household may prioritise lighting and communications, while a shop may focus on refrigeration and payment equipment. Write those priorities down before comparing batteries. A clear brief helps an installer separate essential circuits from discretionary loads and avoids assuming that a system intended for selected appliances will run an entire property under every condition.

Make an essential-load schedule

For each essential appliance, record its input power and the hours it is expected to operate during an interruption. Include equipment that cycles automatically, such as a refrigerator, and distinguish average energy use from its starting demand. Check the actual appliance label or a measured load record rather than relying on a similar product online. The schedule should also show which appliances may run together. That overlap matters because enough daily battery energy does not automatically mean enough inverter power at a particular moment.

Read capacity and output separately

The supplied Home Systems table lists SSP-PEG5K-A1-8S with 2.68 kWp of PV, 8 kWh of storage and 5 kW maximum output. These figures describe different parts of the system. PV capacity describes the array, storage describes the listed battery capacity and output describes a system power limit. None establishes a guaranteed backup duration by itself. Usable energy, operating limits, conversion losses and the actual load schedule all need review. Ask for the technical schedule that defines those limits for the equipment being offered.

Check transfer and isolation

Backup requires a suitable arrangement for separating the supported circuits from the grid and transferring between operating modes. The PEG5K table includes an automatic transfer switch, but its presence is only a starting point for a design discussion. Ask the installer to confirm how the switch is rated, connected and coordinated with the inverter and distribution board. Explain whether a short interruption is acceptable for your appliances. A grid-connected balcony microinverter configuration should never be assumed to provide isolated backup simply because it generates solar electricity.

Plan the next recharge

An interruption can extend into cloudy weather or arrive before the battery is fully charged. Discuss how the system will recharge, which operating settings control the reserve and how essential loads will be managed during a longer outage. The product table gives approximate daily generation for comparison, not a local weather forecast or an assurance that the battery will refill each day. Send the site location, shading conditions and intended operating season so the installer can assess the energy balance rather than designing around a single favourable day.

Review generator support where needed

For a site with an existing diesel generator, supply its rating, controller model and automatic-start details. Integration depends on charging limits, transfer logic and protection, including control of power flowing towards the generator. The original HP5000, HS10000 and HS30000 range remains available for technical review, alongside standalone generator supply. Do not assume that a generator and inverter can be connected safely from their nameplate powers alone. Ask for an agreed control sequence and identify who will commission the complete arrangement at the site.

Turn the brief into an inquiry

Send SolarNova the essential-load schedule, desired operating window, country, electrical supply details and photographs or drawings of the proposed equipment space. Add the model you are considering and state whether a generator already exists. Request the final equipment list, usable battery assumptions, transfer arrangement and installation responsibilities in writing. Keep that record with the commissioning documents. A well-defined backup system starts with these practical questions and continues with an operating plan that the household or business can understand and maintain.