Keep the power on through every cut
Power cuts are part of life in Kerala’s hills and rural areas. A well-designed battery keeps your lights, fans, fridge and Wi-Fi running.
On-grid, hybrid or off-grid?
Three kinds of solar system. The right one depends on your power supply and what you want the system to do.
| On-grid | Hybrid | Off-grid | |
|---|---|---|---|
| How it works | Connected to KSEB, no battery | Connected to KSEB, with battery | Not connected to KSEB, battery only |
| Power during a cut | No (switches off for safety) | Yes, for chosen circuits | Yes, always on battery |
| Net metering | Yes | Yes | No |
| PM Surya Ghar subsidy* | Yes, residential | Confirmed during survey | No (PM-KUSUM for farms) |
| Relative cost | Lowest | Higher (battery) | Depends on battery size |
| Best for | Lowest bills, reliable supply | Frequent cuts, working from home | Sheds, pump houses, remote sites |
| Wartens product | Wartens Home | Wartens Home+ | Wartens Farm |
*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 we use LFP (lithium iron phosphate) batteries
LFP is the chemistry we recommend for Kerala homes. Here is why.
Safer chemistry
LFP is thermally stable and far less prone to overheating than other lithium types.
Many more cycles
Built for daily charging and discharging over many years, unlike lead-acid.
No maintenance
No distilled water, no acid fumes, no corroded terminals.
Usable capacity
More of the rated capacity can be used without harming the battery.
Backup designed around your essential loads
In Iritty, Wayanad and other hill areas, cuts can be frequent. We do not just sell a battery; we plan what it runs.
- A separate essential-loads circuit for lights, fans, fridge, Wi-Fi and TV
- Written estimate of backup hours for your loads
- Automatic switchover when KSEB supply fails
- Solar recharges the battery the next morning
Battery retrofits for existing systems
Add an LFP battery to your on-grid system, or replace ageing lead-acid inverter batteries with lithium. No subsidy or paperwork needed.
Battery questions
Batteries and power cutsWill solar give me power during a power cut?
Only if you have a battery. On-grid systems switch off for safety when KSEB supply fails. A hybrid system with an LFP battery, such as Wartens Home+, keeps your essentials running.
Is the subsidy available for hybrid systems?
Subsidy eligibility for hybrid systems is confirmed during survey. It depends on the current scheme rules and how the system is connected.
How long will the battery run my home?
It depends on what you run. We plan an essential-loads circuit and give you an estimate in writing. Air conditioners and water heaters are usually left off backup.
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.
