User Guide

AIMS Power www.aimscorp.net

While for some resistive loads which work in a wide voltage range, the input AC range can be customized to

90-135V, this helps to power loads with the most AC input power without frequent switches to the battery

bank.

In order to make the inverter accept dirty power from a generator, when the SW2 is switched to position “1”,

the inverter will bypass an AC input with a wider voltage and frequency (40Hz plus for 50Hz/60Hz).

Accordingly, the AC charger will also work in a wider voltage and freq range (43Hz plus for 50Hz/60Hz).

This will avoid frequent switches between battery and generator. But some sensitive loads will suffer from

the low quality power.

The pros and cons should be clearly realized.

Power Save Override ON/OFF (SW3):

Under the Battery Priority Mode (SW5 in position “1”), the inverter can be switched between two modes:

Power Saver Mode (SW3 in position “1”) and Unit Off Charging Mode (SW3 in position “0”). The power

Switch should be in “Power saver on” position all the time for using these functions.

In Power Saver Mode, the inverter is initially in standby mode and sends a pulse to detect the presence of a

load every 3 seconds. Each pulse lasts for 250ms. The inverter will remain in standby mode until a load has

been detected. Then it will wake up from standby mode and start to invert electricity from the battery bank

to supply the load. As this function is under Battery Priority, the inverter will always prefer to invert

electricity from battery first even there is a qualified AC input present. Only when the battery voltage is

lower than the low voltage alarm point, will the inverter switch to AC input power to charge the battery and

supply the load at the same time.

This Power Saver Mode can be changed to Unit Off Charging mode via SW3 by switching it to “0” position

(SW5 still in “1”).

In Unit Off Charging mode, the inverter will stay in standby mode without sensing loads. It won’t output

any power even if a load is turned on or a qualified AC input is present. The inverter will not perform any

function and only stay idle in this mode, unless the battery voltage is low. Then it will start charging the

battery. This feature is ideally suitable for applications where energy conservation is required. Charging will

only be activated when required.

Frequency Switch (SW4):

The output frequency of the inverter can be set at either 50Hz or 60Hz by SW4.

AC/Battery Priority (SW5):

Our inverter is designed with AC priority by default. This means, when AC input is present, the battery will

be charged first, and the inverter will transfer the input AC to power the load. Only when the AC input is

stable for a continuous period of 15 days will the inverter start a battery inverting cycle to protect the

battery. After 1 normal charging cycle ac through put will be restored.

The AC Priority and Battery Priority switch is SW5. When you choose battery priority, the inverter will

invert from battery despite the AC input. Only when the battery voltage reaches the low voltage alarm

point(10.5Vdc for 12Vdc, 21Vdc for 24Vdc, 42Vdc for 48Vdc), will the inverter transfer to AC input,

charge battery, and switch back to battery when the battery is fully charged. This function is mainly for

wind/solar systems using utility power as back up.

Note: In battery priority mode, when qualified AC inputs for the first time and the battery voltage is

below 12.5Vdc (12.5Vdc for 12Vdc, 25Vdc for 24Vdc, 51Vdc for 48Vdc), the inverter will go into

battery priority mode only after a cycle of bulk charging and absorb charging is finished. The inverter

will not go into float charging mode.