Offer solar backup: one socket or Full Backup?

A homeowner wants to keep using electricity from their PV installation during a power cut. In conversation with your solar business, they simply ask for backup power. That can mean very different purchases: a particular socket for individual devices or broader backup supply through the house installation. Distinguishing these defines the equipment and services you actually offer. A battery alone does not answer the question.

This guide helps solar installers and electrical contractors working on private projects in Germany choose a clear supply scope. Fronius PV Point and Full Backup are concrete examples. Responsible specialists assess the actual configuration and loads. This is neither switching guidance nor confirmation that every house or appliance can use either package.

Ask which use matters most

First establish what should remain usable during an outage. Does the customer want individual small devices at a designated point, or continued supply to existing household circuits? Ask for actual appliances and their intended location. Household is too broad. A charger at one point differs from several permanently connected loads in different rooms.

Clarify what keep running means too. Is use after an interruption acceptable, or does a device explicitly need uninterrupted power? Record that distinction for your specialist. A general backup label does not confirm uninterruptible supply. Assess the actual requirement before selecting a product name, so the customer receives a relevant answer.

Show the individual supply point

The Fronius backup portfolio describes PV Point as basic supply for selected single-phase loads. The GEN24 product guide assigns a socket during an outage to ordinary PV Point. This provides a concrete starting point for limited needs. Name the actual planned supply point and agreed services in your quotation.

Explain this point at its proposed location once the technical team has assigned it. One backup socket does not automatically supply all existing household sockets. The customer should know which point the selection concerns. That explanation gives no instructions for temporary connections or repurposing wiring. Your business sells a professionally planned solution for a clearly described purpose.

Distinguish PV Point from PV Point Comfort

For PV Point Comfort, Fronius describes an additional retrofit board and supply to the intended point or circuit during normal grid-connected operation too. For ordinary PV Point, the guide instead describes supplying the socket during an outage. Do not merge these models into one vague basic solution. The customer’s intended everyday use may influence the specific equipment selected.

Show the exact name and confirmed function in the offer. A basic function inside the inverter does not mean all desired additional services are already implemented. Your team establishes the actual configuration and project scope. If you explain Comfort, procurement must not silently use the simpler package. The customer should recognise the discussed use in the quoted item.

Present Full Backup as a different system package

Full Backup concerns broader supply through the house installation. The portfolio names a hybrid inverter, battery and switching component. The product guide adds required system parts and model limits. The customer therefore buys a different package from a single supply point. Explain the interaction at quotation level without describing electrical connections or a sequence of switching actions.

Have your specialists assess the intended scope using actual loads. The name does not mean any appliance can run simultaneously or indefinitely. Customers need a clear statement about their assessed configuration. Identify the areas actually considered and supply limits. A broader package should meet a broader assessed need, rather than merely sounding more complete.

Check the exact inverter model

GEN24 alone is insufficient for promising Full Backup. The guide distinguishes GEN24 from GEN24 Plus and explicitly states exceptions within the Symo GEN24 Plus family. The described Full Backup option is unavailable for Symo GEN24 Plus models from three to five kilowatts. This model boundary matters even when a general overview promotes the whole family.

Have your team assign the exact version and applicable document revision. An existing inverter must be identified. For a new installation, quote the version actually available to order. An announced possibility or generally mentioned upgrade does not establish a current package feature. Sales uses the specific technical statement applicable to this project.

Choose the desired switching convenience

For Full Backup, Fronius describes Backup Switch as manual and Backup Controller as automatic. That creates another product choice. Does the customer want to undertake the designated manual operation, or expect automatic transfer? Ask without teaching an operating sequence. Your specialist assigns the appropriate configuration intended for the project location.

The portfolio notes country-specific availability and certification. An image from another market therefore does not confirm a German configuration. Specify the actual item and included specialist service. Automatic also says nothing about uninterrupted power. A special requirement mentioned earlier must receive an explicit answer; more convenient transfer does not replace that assessment.

Include available energy

The manufacturer also describes PV Point without a battery. The required energy must then actually be available from PV. Customers imagining a night-time outage should understand that dependency. A basic function does not create an energy source available at all times. Discuss the actual intended use with your specialist before presenting the limited package as suitable.

Even with storage, supply depends on the actual system and available energy. A large capacity figure alone establishes no fixed outage duration. Appliances, use and system conditions belong in the assessment. This guide provides no hours. What matters is the basis your business confirms for the actual offer and which expectation it really answers.

Distinguish other generators and existing equipment

A customer may have more PV equipment besides the inverter under consideration. The Fronius guide explicitly distinguishes additional AC sources in normal operation from their limits during backup operation. Your designers therefore need to establish which existing equipment actually belongs to the proposed backup supply. A common display of devices does not confirm this. Assess the real system and its intended operating scope.

Record which existing components were considered. Customers should recognise what their new selection changes. The phrase whole PV installation must not suggest every generator continues operating identically during an outage. Sales explains the confirmed outcome in everyday language. Electrical implementation and necessary coordination remain with the responsible specialists.

Compare both packages against the same task

Compare the supply point and broader package against the same described use. Which wishes does the confirmed basic solution meet, and which require another scope? A customer wanting just one point may deliberately choose that assessed package. Permanently connected loads require their specific technical assessment. A bigger product name does not explain the difference.

Use your business’s real prices and services. Include genuinely required components and work in the broader package. Describe the limited point equally completely. An inverter price beside a complete backup solution is not an understandable comparison. Show which difference comes from additional equipment and which from agreed services.

Prepare the eventual user briefing

Discuss who will use the selected solution and what instruction your business actually provides. For a manual option, include the responsible person. The technical team gives the appropriate explanation, without an improvised operating sequence from sales. Automatic transfer also needs an understandable description of intended behaviour and actual system limits.

Clarify how questions after handover will be handled. Describe only agreed support. Supplying a backup option does not establish an unlimited standby service for every outage. An identified contact and correct manufacturer documents help customers recognise their equipment. The responsible specialist determines handover checks for the actual installation.

Two fictional customers choose differently

In the first invented case, an owner wants to use named devices at a designated point during an outage. After technical assessment, he understands energy dependency and the confirmed scope, and chooses the appropriate basic solution. No supply to every existing household socket or uninterrupted operation is promised. The limited scope meets the explicitly assumed wish here.

In the second fictional case, a customer wants particular permanently connected loads assessed. The business has a suitable Full Backup package checked with exact inverter, battery and switching assignments. After a complete comparison, she selects the confirmed scope and discussed transfer convenience. This establishes neither unlimited duration nor suitability of the combination for other homes.

Summarise the chosen supply scope

Keep device version, proposed supply point or areas considered, associated battery and switching component in one quotation version. The customer should recognise the selected use. A general backup tick box leaves unclear the very products and services you compared. Purchasing and the technical team need the same confirmed version.

If an important load or device version changes, reassess the affected assignment. Keep already clarified preferences. Give the customer the actual new statement about the changed package. You sell an understandable supply solution for their needs, without turning a general wish for security into an unlimited promise.

New solar conversations for your business

Register on the webRichtung solar page. Enquiries from Germany concern PV including planning and installation. Building type, system preference, planning stage, location and contact open the discussion. Backup wishes, actual loads and suitable components are not additional promised lead details or filters. You establish these yourself. See the price in webRichtung Customer before ordering; the monthly limit promises no volume.

Sources and context

The complete Fronius backup portfolio and GEN24 product guide were read on 17 October 2026. Examples retain their model and market boundaries. Customer questions and fictional cases are editorial aids. Responsible specialists undertake design, electrical work and necessary coordination for the actual project.