The wrong inverter quietly kills good batteries and trips when you need it most. Here’s the plain-language guide to types, sizing, and warning signs — then a quote with a same-day callback.
Pure sine for business loads. Size for the motor surge, not just the running watts. Match it to your battery type.
You don’t need the spec sheet. You need to know which of these matters for your setup.
Pure sine wave gives clean, grid-like power. Modified sine is cheaper but rougher — it can buzz, heat, and shorten the life of motors, medical gear, and sensitive electronics.
Inverters are rated in kVA. Too small and it trips or overworks; too large and you overpay. The right class covers your running load plus the surge when a motor or AC kicks in.
A hybrid inverter manages grid, storage, and solar as one system, switching over cleanly. Worth it if solar is on your horizon — it saves buying twice.
A lithium-ready inverter has the correct charge profile and talks to the battery’s BMS. Essential if you’re on — or moving to — LFP batteries.
Add your appliances — including AC or motors, which need extra headroom to start — and get the inverter class you actually need, not the one on the shelf. Free, no sign-up.
Open the full tool ›You’ve got a motor/AC load. Lead-acid loses usable capacity at high draw, and the inverter must handle the start surge. Lithium (LFP) holds its rating ›
Category-level only — no brand or model. We confirm the exact string, wiring, and placement on quote.
Indicative — confirmed on assessment.
If you recognise two or more of these, the inverter — not the battery — may be your real problem.
The surge from a motor or compressor exceeds what the inverter can deliver — a classic undersizing sign.
A mismatched or failing inverter is inefficient, pulling more from the bank than it should.
Heat and noise under normal load point to strain, ageing components, or a modified-sine unit on the wrong load.
If runtime fell without changing the batteries, the inverter’s efficiency or charging may be the culprit.
Having to switch things off to keep it stable means the load has outgrown the inverter.
A laggy or clicking changeover on power cuts suggests worn relays or an ageing unit near end of life.
The inverter charges your batteries. If its charge profile is wrong for the chemistry — or it’s undersized and constantly overworked — it over- and under-charges the bank in ways you never see, until backup time collapses years early.
This is why we never sell an inverter in isolation. We match it to your battery type and load, so both last as long as they should.
Lead-acid and lithium need different charging. The wrong one silently degrades the bank.
An undersized inverter runs flat out, ages fast, and mis-charges under strain.
Fast, stable transfer protects both the load and the battery from stress.
A few details is all we need. We size for the surge, match it to your battery, and quote individually — no list price, because the right inverter depends on your job.
For a business, pure sine wave almost always. It runs motors, compressors, medical equipment, and sensitive electronics cleanly. Modified sine is cheaper but can cause buzzing, heat, and early failure in those loads — a false economy for most offices, shops, and clinics.
It depends on your total connected load and whether you run motors or ACs, which need roughly 3× headroom to start. Use our free sizing tool above for a category-level answer, or send your appliance list and we’ll size it properly.
Common signs: it trips when a motor or AC starts, batteries drain faster than they should, the unit runs hot or buzzes, backup time has dropped, or it can’t carry everything at once.
Yes. An inverter with the wrong charge profile, or one that’s undersized and overworked, mis-charges the bank — one of the most common causes of early battery death.
A lithium-ready inverter has the correct charge profile and BMS communication for LFP batteries. A hybrid inverter manages grid, storage, and solar as one system with clean switchover.
No — the right inverter depends on your load, battery type, and whether you need hybrid or solar features. Share your setup and we quote individually, usually with a same-day callback.