16 guides on inverters, batteries, UPS systems and solar — what the symptom usually means, and what to check before you call anyone.
Topping up every few weeks means something is wrong. The usual causes are charge voltage set too high, heat, or too much charge current — with the numbers to check each one.
Two separate limits decide this: watts for what runs at once, watt-hours for how long. Work out both with the real numbers, including the start-up surge that trips inverters.
Battery, engine or panels? Compare what each actually runs, where the money goes over five years, and the safety rules that matter — then match it to how your outages behave.
Fan speed follows voltage, and turning force follows voltage squared — so a small sag is very visible. How to tell a weak battery from a waveform problem from a tired fan.
Often you do not need to — a closed fridge holds for about 4 hours. When you do, it comes down to surge rating, waveform and duty cycle. The numbers for each.
Nothing is truly forbidden — but an iron spends a whole evening of backup in half an hour. What each appliance really costs you in runtime, and the socket audit worth doing.
Yes — expect roughly half of summer output. Here is the sum that tells you whether your drop is normal or whether dust, shading or settings are costing you more than the season.
It turns on one number: how often you deep-discharge. Cycle life, usable capacity and charge behaviour compared, plus the compatibility checks that catch people out.
An inverter turns roughly a tenth of what it delivers into heat, continuously. Where that heat goes decides whether it shuts down — and how fast your batteries age.
A TV usually survives it. A modern desktop often will not — active PFC power supplies expect a smooth input. Which devices mind, which do not, and how to tell what you have.
Usually it is not the battery. Standby draw, always-on devices and a bank that never finished charging account for most of it — with the numbers to check each.
Most disappointing installations fail on two things: cable too thin for the current, and no fuse between battery and inverter. The numbers for both, plus the rest.
Usually leave it on. Switching off saves 8–35 W of standby but also stops charging, and a lead-acid battery left partly charged loses capacity permanently.
About ten hours for a 150 Ah battery from half empty on a 10 A charger — and the last fifth takes the longest. Why 'full' on the display often is not, and what to check.
The rhythm tells you the cause. One click is normal switching; clicks every few seconds mean voltage sagging to cut-off; rapid chatter means a loose connection — stop and check.
Four hours of a 1.5 ton AC needs about eight batteries. The arithmetic that ends the question, what a workable setup actually looks like, and what to do instead.
