Sorry if this is really simple but as I'm a complete total newbie, I just don't know if I've been a bit naive about what electrical appliances I thought I could use....
We have three leisure batteries and the other day, we did three hours cruising. In the evening we did a little bit of vaccumming (with a cheap 1400w argos vaccuum) and then had the radio on on the stereo/hi-fi. (its a new one with i pod dock etc)
Basically, the radio went off after an hour and the inverter closed down.
Today, I had the engine running for around hour and a half. I did some vaccuuming again whilst the engine was running, and I've had a small 10" laptop on charge and on since 6pm and at now 9pm, the inverter has bleeped to tell me its closing down again.
Lights, 12v stuff are and always have been ok (12v fridge included)
Is this normal? Is that the amount of electric im supposed to get????? Or should my batteries be able to supply me with more?