Meet Lento: The Indian Brand Revolutionizing Power Backup with Lithium Technology

Power cuts remain a daily reality for millions of Indian homes and businesses. From brief grid failures in Tier-2 cities to extended outages in rural corridors, reliable backup power is not a luxury; it is a necessity. With a market crowded with imported and re-badged components, a handful of genuinely Indian brands have built their reputation around actually giving consumers something that solves problems at a larger level. Lento Industries Private Limited is one of them.What makes Lento, as a brand, worth considering for a better battery is that it comes at a time when lead-acid inverters dominated Indian homes and lithium technology was largely confined to industries. Over the decade that followed, companies like Lento have grown into vertically integrated manufacturers with a global footprint and a product range that now spans household inverters, batteries, online UPS systems, LED lighting, and solar energy solutions.Most homes in India once relied only on lead-acid batteries when using an inverter, but this carries similar drawbacks. It requires frequent refilling of water in the battery; charging takes hours, and after 2-3 years, it just drains out and fails to perform.Now Lithium Iron Phosphate tackles every downside clearly. With a solid build, one such battery can handle at least 4,000 full cycles, which is way beyond the usual 500 to 800 found in conventional batteries. It also improves charging while letting you pull out nearly all stored power, using 80 to 90 per cent without harm instead of being limited to half. It requires zero maintenance, produces no fumes, and carries no risk of acid spillage, making it safe for indoor installation.The higher upfront cost of a lithium inverter is offset by the total cost of ownership over a decade. A lead-acid battery requiring replacement every 2-4 years costs the household more in the long run, while a LiFePO4 system continues to operate at full capacity across its entire rated cycle life. Built-in Battery Management Systems (BMS) in modern lithium inverters add a further layer of protection from over-temperature, voltage, and current in real time to prevent overcharge, deep discharge, and overheating.Lithium fits better with home solar setups because it charges more efficiently. With around 95% efficiency, compared to lead-acid's 70–80%, fewer solar electrons are lost during storage. That leftover power stretches out backup time when the grid drops off. Before you explore our recommendations, here's something important to know: All the inverters listed below come with a built-in integrated battery, so there's no need to purchase a separate battery. This all-in-one design makes installation easier, reduces clutter, and lets you start using the inverter right out of the box.Below are our top picks for solar inverters with an integrated lithium battery. These all-in-one units simplify installation, save space and don't require a separate battery. These models support both grid charging and solar charging, ensuring a comfortable user experience: Built for 2 BHK homes and small offices, this wall-mountable unit integrates a 12.8V/86Ah LiFePO4 battery directly into the inverter chassis; no separate battery needed. An inbuilt PWM solar charge controller enables simultaneous charging from the grid and solar panels. Pure sine wave output keeps sensitive electronics safe. Backup duration is 3 to 3 hours 15 minutes at 400 W. A complete, installation-ready system with zero maintenance requirements across its entire service life.Key Features: Designed for 3 BHK homes and small offices, this hybrid inverter delivers 2100VA output with an inbuilt 25.6V LiFePO4 battery. The PWM solar charge controller prioritises solar energy automatically, reducing grid dependence without requiring a separate controller. It simultaneously supports fans, lighting, televisions, refrigerators, and computing loads. Maintenance-free sealed battery, intelligent multi-source switching, and an LCD display for real-time system monitoring make this a strong mid-range solar backup choice.Key Features: The most capable model in Lento's PWM inbuilt lithium lineup, this 2.5KVA hybrid solar inverter is built for 2–3BHK homes with rooftop solar. Dual-source charging prioritises solar during the day and falls back to the grid automatically. With a 12-plus-year battery design life, up to 6 hours 15 minutes of backup at 400W, and pure sine wave output, it functions as a complete all-in-one solar-plus-backup solution requiring no additional components.Key Features: A solar-ready 1100VA inverter with a built-in 12.8V LiFePO4 battery and PWM charge controller, designed for 2 BHK homes and studios entering solar backup for the first time. Prioritises solar during daylight and switches to the grid automatically when input drops. Powers fans, LED lights, router, and mobile charging through extended outages. Plug-and-play design makes it accessible for first-time buyers upgrading from conventional lead-acid setups.Key Features:If you're looking for a compact power backup solution without solar support, these inverters feature a built-in lithium battery, offering hassle-free installation and dependable performance. A straightforward, no-solar home backup unit for 2BHK households upgrading from lead-acid setups. The 12.8V LiFePO4 inbuilt battery and 1100VA pure sine wave output cover fans, LED lights, the router, and the television without requiring a separate battery or any periodic maintenance. Sealed LiFePO4 chemistry makes it safe for indoor installation. Ideal for households facing two to four hours of daily power cuts.Key Features: A standalone inverter UPS for households needing high-capacity backup without solar integration. The 25.6V LiFePO₄ built-in battery delivers up to 6 hours 15 minutes at 400W. Pure sine wave output protects sensitive appliances, while the LCD display provides live system visibility. The portable wheel-based design suits renters, frequent movers, or anyone needing backup power across multiple rooms without permanent installation.Key Features: A high-capacity solution for 3–4BHK homes and small commercial spaces, this 2.5KVA unit carries an inbuilt 100Ah LiFePO4 battery at 25.6V, delivering up to 6 hours 15 minutes of backup at 400W. Fast charging minimises downtime between outages. The wheel-based portable design allows easy repositioning. Backed by a 5-year battery warranty and a 3-year inverter warranty, among the strongest coverage available in this category.Key Features: