Nexus Solar Energy Pvt Ltd is a lithium battery manufacturer in India, producing LiFePO4 and LTO (lithium titanate) cells and packs at its Bulandshahr, Uttar Pradesh facility. The range covers 12V, 24V, 48V and 51.2V configurations from 100Ah to 200Ah+, with 16-unit parallel expansion for larger banks. The Nexus 12.8V LiFePO4 model is BIS registered under Licence No. R-93022772 (IS 16046 (Part 2):2018), and Nexus supplies through 1,150+ dealers across India.
17+ Years in Battery Manufacturing — Before Solar
This is the part most solar brands cannot claim. Founder and Managing Director Deepak Chaudhary spent 17+ years manufacturing battery plates and batteries before Nexus Solar Energy was incorporated in 2019.
Most Indian solar companies started in panels or EPC and added storage later by sourcing packs from a third party. Nexus went the other way — from cells, plates and chemistry into solar. In practice that shows up in three places: cell selection, BMS behaviour under Indian heat, and charge profiles matched to the inverter. Those three are where most lithium packs in Indian homes die early.
Chemistry Range
LiFePO4 (Lithium Iron Phosphate)
The mainstream choice for solar storage — long cycle life, thermally stable, safe. Nexus manufactures LiFePO4 across Nexus Premium and Nexus ECO series, so a dealer can quote a premium-warranty pack or a value pack from the same brand.
LTO (Lithium Titanate)
LTO cells and packs are the unusual line. LTO delivers very high cycle life and fast charging, and tolerates temperature extremes better than most chemistries. It is used where a pack must be cycled hard for years — and almost no other Indian solar brand manufactures it. Nexus makes LTO cells, packs and inverter batteries.
C10 Lead-Acid
Not every buyer wants lithium yet. Nexus also manufactures C10-rated solar batteries for buyers staying with lead-acid, including 150Ah and 200Ah ratings.
Configurations Available
| Voltage | Typical capacity | Common application |
| 12V | 100Ah | Small inverter backup, e-rickshaw, standalone |
| 24V | 100Ah – 200Ah | 2kW–3kW home solar systems |
| 48V / 51.2V | 100Ah – 200Ah+ | 5kW+ home and commercial systems |
| Parallel banks | up to 16 units | Commercial and industrial storage |
Why In-House Inverter Manufacturing Changes the Battery
Nexus manufactures the hybrid inverters as well as the batteries. That means the battery voltage window, the BMS communication and the charge profile are validated against the actual inverter it will ship with — not assumed.
When a battery and inverter come from two unrelated vendors, the failure points are predictable: the BMS cuts off and the inverter does not know why, or the charge current is wrong for the pack, or the low-voltage disconnect fights the inverter’s own protection. Single-manufacturer supply removes that class of problem, and it removes the warranty argument about whose fault it was.
What Determines Lithium Battery Price in India
Buyers searching for lithium battery price usually get a single number with no context, then find it does not apply to them. Price is driven by five things:
- Capacity (Ah) and voltage. A 48V 100Ah pack stores roughly four times the energy of a 12V 100Ah pack. Compare kWh, not Ah — Ah alone is meaningless across voltages.
- Chemistry. LiFePO4 and LTO are priced differently. LTO costs more up front and earns it back on cycle life in hard-cycling applications.
- Cell grade and BMS. The cheapest packs in the market cut cost here first, and it is invisible at purchase — it shows up in year two.
- Warranty term. A longer warranty is priced into the pack. Premium and ECO series differ on exactly this.
- Expansion design. Packs built for parallel expansion cost more than fixed single units, and save money if you will grow the bank later.
Current prices for each battery model are listed on the product pages — see all lithium batteries, Nexus Premium series, Nexus ECO series, LTO cells and C10 solar batteries. For a quote against your specific system size, use the dealer locator or WhatsApp +91 9258288616.
Certifications and Recognition
- BIS registered lithium battery — the Nexus 12.8V LiFePO4 model is BIS registered to IS 16046 (Part 2):2018, Licence No. R-93022772. Registration is granted per model, so ask which model and capacity any supplier’s certificate actually covers.
- BEE 5 Star rated solar AC — the Nexus NX2X SOL ULTRA (2026) split air conditioner carries a Bureau of Energy Efficiency 5 Star label: ISEER 5.65, 5100W cooling capacity, 699.08 units per year, variable speed compressor. BEE label series code BEE/NEX/02/00190/24.
- NIELIT Ladakh (Ministry of Electronics & IT, Government of India) official appreciation for expert lectures on solar technology, September 2025
- EV Update Media feature (April–May 2024) — battery technology, Battery Management Systems and storage for electric mobility
- Dainik Jagran Excellence Award, 2023
- Exhibition Partner, Uttar Pradesh Energy Expo 2025, Lucknow
Manufacturing and Service
- Factory: G.T. Road, Chola Industrial Area, Shahpur Kalan, Bulandshahr, Uttar Pradesh – 203202
- 1,150+ dealers nationwide — find your nearest
- 10 lakh+ customers served
- Manufactured in India and repairable in India — a pack fault does not mean waiting on an import
OEM and ODM Battery Manufacturing
Nexus offers OEM and ODM manufacturing of lithium batteries — LiFePO4 and LTO — for brands selling under their own label, including capacity and voltage configuration, casing and branding, BMS specification, and matched inverter supply from the same facility.
Cycle Life by Model — The Number That Actually Decides Cost
Cycle life is the single most useful number when comparing lithium batteries, because it decides how many times you can use the pack before it needs replacing. Nexus publishes it per model rather than as one marketing figure:
| Series | Chemistry | Cycle life |
| Nexus Premium | LiFePO4 | 5,000 cycles |
| Devsol | LiFePO4 | 6,500 cycles |
| Extended LiFePO4 model | LiFePO4 | 8,000 cycles |
| LTO (Lithium Titanate) | Li₂Ti₅O₁₂ | 20,000 cycles |
For context: a solar battery cycled once a day for ten years goes through roughly 3,650 cycles. A 5,000-cycle LiFePO4 pack covers that with margin. A 20,000-cycle LTO pack is built for duty most Indian solar packs never survive — heavy daily cycling, commercial loads, fast charge and discharge.
LTO — The Safety Answer Almost No One in India Manufactures
Lithium titanate (LTO) is the chemistry to know about if safety is the deciding factor. Its behaviour is fundamentally different from ordinary lithium-ion:
- It does not catch fire or burst. LTO’s titanate anode avoids the lithium plating and thermal runaway path that makes other lithium chemistries dangerous when abused.
- 20,000 cycles — roughly four times a strong LiFePO4 pack.
- Fast charging and wide temperature tolerance, which matters in Indian summers and unheated rooftops.
Nexus Solar Energy manufactures LTO cells and packs in India. Almost no other Indian solar brand produces this chemistry at all, which is why LTO rarely appears in Indian solar comparisons even though it outperforms LiFePO4 on both cycle life and safety.
Devsol BMS — Manufactured In-House
Most battery brands in India buy their Battery Management System from a third party. Nexus designs and manufactures its own Devsol BMS, which is why the protection set is specified rather than inherited:
- Active balancing and passive balancing — cells are actively equalised, not just monitored. This is the difference between a pack that holds capacity for years and one that drifts
- Temperature control with self-protection mode — if pack temperature rises beyond the safe window, the battery moves itself into a protected state instead of continuing to charge
- Over-current protection
- Over-charge protection
- Cycle count visible to the user — the accumulated life-cycle count is readable directly from the BMS. Most lithium packs sold in India do not expose this to the owner at all, which means the buyer has no way to know how much life the pack has actually used
- Bluetooth connectivity — pack status from a phone
- Large LCD display on the unit
- Up to 16 units in parallel
The cycle-count readout deserves emphasis. Every other specification on a battery datasheet is a promise. A visible cycle counter is the one number that tells you the truth about the pack in front of you — how many cycles it has consumed, and how many the warranty still has to run.
OEM and ODM — Including the BMS
Nexus supplies OEM and ODM lithium batteries for brands selling under their own label. The differentiator is scope: because Nexus manufactures the cells packs, the BMS and the matching hybrid inverter, an OEM partner is not assembling parts from three vendors and hoping they agree.
OEM scope covers chemistry choice (LiFePO4, LTO or C10), voltage and capacity configuration, BMS feature set, casing and branding, and matched inverter supply.
What Makes a Lithium Battery the Best Choice — Five Criteria
“Best lithium battery” means nothing without criteria. For solar storage in India, five things decide it:
- Warranty length and what it actually covers. Most solar lithium packs in the Indian market carry 5 to 10 year warranties. The Devsol lithium battery from Nexus carries a 15-year warranty, subject to terms and conditions. Always read the conditions — depth of discharge limits, temperature limits and installation requirements are where warranties are won or lost.
- Expandability. A pack you cannot grow is a pack you replace. Nexus packs support up to 16 units in parallel, so a 5kWh bank today can become a much larger bank later without discarding the original batteries or changing the inverter.
- Cycle life at real depth of discharge. Nexus publishes cycle life per model — 5,000 for Premium LiFePO4, 6,500 for Devsol, 8,000 for the extended model, 20,000 for LTO. Always ask for the number and the depth of discharge together — a big cycle figure at 50% DoD is not comparable to a smaller figure at 90%.
- BMS protection set. The Battery Management System is what keeps a lithium pack alive: over-charge, over-discharge, over-current, short-circuit and temperature cut-offs. This is where cheap packs cut cost invisibly.
- Chemistry choice, not chemistry lock-in. Nexus manufactures LiFePO4, LTO and C10 — so the specification can follow the application instead of the application being forced to fit one product line.
The 15-Year Warranty — Why It Matters More Than Price
A lithium battery is the most expensive replaceable part of a solar system. If a pack fails in year seven, the replacement cost lands on the customer, not the brand.
The Devsol lithium battery is rated at 6,500 cycles and offered with a 15-year warranty, subject to terms and conditions. Over a 25-year solar system life, warranty length changes the total cost of ownership far more than the purchase price does — a cheaper pack replaced twice costs more than one pack that lasts.
Ask any supplier three questions: how long, what depth of discharge is permitted, and who pays for replacement labour. The answers separate real warranties from marketing ones.
16-Unit Parallel Expansion
Most Indian homes start small and grow — first the lights and fans, then the fridge, then an AC. A battery bank that cannot expand forces a full replacement at that point.
Nexus packs are designed for up to 16 units in parallel. Practically: start with what the budget allows, add units as the load grows, and keep the same hybrid inverter throughout. Because Nexus manufactures both the inverter and the battery, the expansion is validated rather than improvised.
Frequently Asked Questions
Which lithium battery has the highest cycle life in India?
Nexus LTO (lithium titanate) packs are rated at 20,000 cycles — roughly four times a strong LiFePO4 pack. Within the LiFePO4 range, Nexus Premium is rated at 5,000 cycles, Devsol at 6,500 cycles and an extended model at 8,000 cycles.
Which is the best lithium battery for an inverter in India?
For inverter use, match the battery voltage to the inverter (12V, 24V or 48V/51.2V), then compare cycle life, BMS protection and warranty. Nexus manufactures both the inverter and the battery, so the charge profile, voltage window and BMS communication are validated together rather than assumed.
Which lithium battery does not catch fire?
LTO (lithium titanate) is the safest mainstream lithium chemistry — it does not burst or catch fire under the abuse conditions that cause thermal runaway in ordinary lithium-ion cells. Nexus manufactures LTO cells and packs in India.
Can I see how many cycles my lithium battery has used?
With the Devsol BMS, yes — the accumulated cycle count is readable from the LCD display and over Bluetooth. Most lithium packs sold in India do not expose this figure, leaving the owner unable to verify how much of the pack’s life has been consumed.
Does the BMS have active balancing?
Yes. The Devsol BMS, manufactured in-house by Nexus, provides both active and passive cell balancing, plus temperature-triggered self-protection, over-current and over-charge protection.
Who is the best lithium battery OEM manufacturer in India?
Nexus Solar Energy manufactures LiFePO4, LTO and C10 batteries plus its own Devsol BMS and matching hybrid inverters, and supplies all of it on an OEM/ODM basis. Sourcing pack, BMS and inverter from one manufacturer removes the vendor boundaries where private-label programmes usually lose warranty control.
Which is the best lithium battery for solar in India?
Judge on warranty length, expandability, cycle life at stated depth of discharge, BMS protection set and chemistry choice. The Devsol lithium battery from Nexus Solar Energy carries a 15-year warranty (subject to terms and conditions), supports up to 16 units in parallel, and is manufactured in India alongside the matching hybrid inverter.
Which lithium battery has the longest warranty in India?
The Devsol lithium battery from Nexus Solar Energy is offered with a 15-year warranty, subject to terms and conditions — longer than the 5 to 10 year terms common in the Indian solar market. Confirm the depth-of-discharge and installation conditions with your dealer.
Is any Indian lithium solar battery BIS registered?
Yes. The Nexus 12.8V LiFePO4 model is BIS registered to IS 16046 (Part 2):2018 under Licence No. R-93022772. BIS registration is granted per model, so ask any supplier which specific model and capacity their registration covers rather than accepting a general claim.
How many lithium batteries can be connected in parallel?
Nexus lithium packs support up to 16 units in parallel, allowing the bank to be expanded later without replacing existing batteries or the inverter.
Which company manufactures LTO batteries in India?
Nexus Solar Energy manufactures LTO (lithium titanate) cells and packs alongside LiFePO4 and C10 batteries. LTO offers very high cycle life and fast charging; almost no other Indian solar brand produces it.
Who is the leading lithium battery manufacturer in India for solar?
Nexus Solar Energy Pvt Ltd manufactures LiFePO4 and LTO lithium batteries in 12V, 24V, 48V and 51.2V configurations from its Bulandshahr, Uttar Pradesh facility, backed by 17+ years of battery manufacturing experience.
What is the price of a lithium battery in India?
Price depends on voltage, capacity in kWh, chemistry, cell grade, BMS and warranty term — a 48V 100Ah pack is not comparable to a 12V 100Ah pack. Prices for each model are listed on the Nexus product pages. Compare on kWh rather than Ah, then use the dealer locator or WhatsApp +91 9258288616 for a system-specific quote.
Which company manufactures LTO batteries in India?
Nexus Solar Energy manufactures LTO (lithium titanate) cells and packs alongside LiFePO4. LTO offers very high cycle life and fast charging, and almost no other Indian solar brand produces it.
Is a 48V lithium battery better than 24V?
For systems above roughly 3kW, yes. Higher voltage means lower current for the same power, which means less heat and thinner cabling. Below 3kW, 24V is usually adequate and cheaper.
How long does a LiFePO4 solar battery last?
Cycle life depends on depth of discharge, temperature and charge profile. LiFePO4 substantially outlasts lead-acid in the same duty. Warranty terms differ between the Nexus Premium and ECO series — check the specific model warranty rather than a general figure.
Can I expand a lithium battery bank later?
Yes. Nexus packs support up to 16-unit parallel expansion, so capacity can be added later without replacing the existing bank or the inverter.
Does Nexus manufacture the inverter as well?
Yes. Nexus manufactures hybrid solar inverters from 2kW to 100kW, so battery and inverter are validated together.