KiDi Solar · Backup Power
Backup Power for Solar Systems on the Costa del Sol
When the grid goes down, a standard solar system shuts down with it. KiDi Solar installs hybrid inverters with built-in backup and battery storage for villas and homes across Marbella and the Costa del Sol, so your villa or home stays powered through blackouts, on the circuits you choose or the whole house.
330+
Projects
5.0
LiFePO4
Storage
The Problem
What Happens to Your Solar Panels During a Power Cut?
A standard grid-connected solar system without a battery switches off when the grid fails, even on a sunny day. This is how inverters protect the people repairing the network.
⚠️
Standard solar, no battery
Switches off when the grid fails, even in full sun. Your home loses power along with the grid.
✅
Hybrid inverter + battery
A hybrid inverter (inversor híbrido) with a battery gives you emergency home power backup and keeps your villa supplied from solar and stored energy.
How Backup Works
What Happens When the Grid Fails
We install hybrid inverters with a built-in backup output, such as the three-phase Growatt WIT 10K-HU (WIT 4–15K-HU series), designed to work with low-voltage lithium batteries (baterías de litio LiFePO4). Protect your villa from blackouts with backup that starts automatically.
01
Grid fails
The inverter disconnects from the grid, so no energy is sent back to it while it is down.
02
Backup takes over
Your backup circuits are supplied from solar and the battery.
03
Grid returns
The system reconnects and normal operation resumes.
What We Install
Solar Battery Storage & Home Power Backup in Marbella & Costa del Sol
🔌
Hybrid inverter
Three-phase Growatt WIT 10K-HU with built-in backup output.
🔋
LiFePO4 battery
Low-voltage lithium storage sized for your home. 16 kWh from €2,200.
🏠
Backup circuits
Part of the house or the whole house, designed around your needs.
We size the system for your home during the free survey. Read more about our battery storage and the inverters we install.
Backup Box
Do I Need a Separate Backup Box?
No. With the hybrid inverters we install, the backup function is built into the inverter, so you do not need an extra external backup box. A separate box is only needed with inverters that have no backup output. We confirm this for your property during the free survey.
NO
extra backup box needed
Backup is built into the hybrid inverter.
Your Choice
Backup for Part of the House or the Whole House
You decide what stays powered. We design the backup connection around your needs.
💡
Part of the house
- The circuits you choose, for example lighting, fridge, internet and water pump
- Best for keeping essentials running through an outage
🏡
Whole house
- All circuits in the property
- Best for normal daily life during an outage
- You manage consumption by zone to make the stored energy last
Backup Calculator
Calculate Your Emergency Backup Needs
Tick what you want to keep running during a 10-hour blackout with no sun. You get a quick estimate of inverter power and battery capacity.
Step 1 · What should stay powered?
Step 2 · What you need
Planning estimate for a 10-hour blackout with no solar production, so the battery is sized for the worst case. Appliance loads are typical values. Motors such as pool pumps and air conditioners have start-up peaks that we check at the survey. Battery price is indicative, from €2,200 per 16 kWh; the backup connection is quoted separately.
Step 3 · Get your exact quote
Pricing
Backup Power Price on the Costa del Sol
The backup connection is quoted separately from the solar installation, because the price depends on whether you want to power part of the house or the whole house and on how your electrical panel is arranged. We give you a written quote after the survey.
Battery storage
From €2,200
for a 16 kWh LiFePO4 battery
Backup connection
Quoted separately
Part of the house or the whole house, priced after the survey
Want to see how a quote looks? Peek inside a sample backup quote. Planning a full system? See our solar panel installation and battery storage pages. Cooling at night? Try our air-conditioning cost calculator. Charging an electric car? See our EV charging cost comparison. Heating a pool? Try our pool heating cost calculator. Comparing installers? Read our 10 questions to ask a solar installer.
Real Customer Reviews
What Our Clients Say
★★★★★ 5.0 / 5
Based on 91 Google reviews for Kidi Solar, Marbella
FAQ
Frequently Asked Questions
No. The hybrid inverters we install have the backup function built in, so no separate backup box is needed. We confirm this during the survey.
A system without a battery and backup-capable inverter switches off when the grid fails. With a hybrid inverter and battery, your chosen circuits keep running from solar and stored energy.
Both are possible. We quote the backup connection separately for the circuits you want powered, either part of the house or the whole house. With whole-house backup, you manage consumption by zone.
It depends on battery capacity and on what you run during the outage. We calculate this for your home during the free survey.
No. The inverter disconnects from the grid when it fails, so no energy is sent back while the network is down.
It depends on your current inverter. If it has no backup output, we assess during the survey what is needed to add a battery and backup.
Free Solar Survey
FREE BACKUP POWER ASSESSMENT
Save This Year
Get a personalised battery storage recommendation based on your electricity consumption, solar production and backup priorities. We’ll help you understand the right battery capacity, inverter compatibility and installation options for your property.
- Electricity consumption review
- Battery capacity recommendation
- Hybrid inverter compatibility check
- Backup options for selected circuits
- Written battery storage proposal
Get a Free Quote
Tell us about your property and existing solar system. Our team will contact you to discuss the right battery storage solution.