Wartens Backup: add a battery to what you have
Already have solar, or an old inverter with lead-acid batteries? Upgrade to lithium backup without starting again.
Is Wartens Backup right for you?
- Homes with an on-grid solar system and no backup
- Homes with ageing lead-acid inverter batteries that need topping up
- Anyone who wants quieter, cleaner, longer-lasting backup
Everything, from survey to handover
- Site visit to check your existing system and wiring
- Compatibility check with your inverter (or a new hybrid inverter if needed)
- LFP battery with battery management system
- Safe removal of old lead-acid batteries
- Installation, testing and handover
No subsidy or paperwork needed
A battery upgrade does not need KSEB approval or a subsidy claim.
Works with most systems
Including systems installed by other companies, after a compatibility check.
Workmanship warranty
Battery warranty as per the manufacturer.
Illustrative photo
Wartens Backup packages
Every package is confirmed after a free site survey, with a fixed price in writing.
| Option | Suits | Price* |
|---|---|---|
| Lithium inverter battery swap | Homes replacing lead-acid inverter batteries | [PRICE] |
| Battery add-on for existing solar | Homes with on-grid solar and no backup | [PRICE] |
*Prices are placeholders until confirmed from current supplier quotes. Your fixed price is given in writing after the site survey. *Subsidy amounts and rules are set by the Government of India and KSEB and may change. Wartens confirms current eligibility during your site survey.
Why families and businesses choose Wartens Backup
Lasts longer
LFP batteries handle many more charge cycles than lead-acid.
No maintenance
No distilled water, no acid fumes, no corrosion on terminals.
Reliable backup
Steady power for essentials during the frequent cuts common in hilly areas.
How it works
One team from first visit to long-term care. You always know what happens next.
Free site survey
An engineer checks your roof, shade, wiring and bills.
Design & fixed quote
A system design, generation estimate and one fixed price in writing.
Paperwork handled
Portal registration, KSEB feasibility and loan documents, done for you.
Installation in 1–2 days
A trained crew with safety gear installs, tests and commissions.
Net meter, subsidy & ongoing care
We coordinate the net meter and subsidy, then stay on for care.
Can you add a battery to a system another company installed?
Usually, yes. We check your inverter and wiring first. If your inverter cannot take a battery, we explain the options, including a hybrid inverter upgrade.
Get a fixed quote for Wartens Backup
Tell us where you are and what you pay each month. We will call to arrange a free site survey.
- No obligation, no pressure
- A written generation estimate for your roof
- One fixed price with no hidden extras
