Can anyone advise as to whether a solar panel can be damaged if left open ended for approx 4 hrs whilst the battery is removed? My thoughts are that it will be fine , but as they say two heads are better than one .
I cover the panel up when I'm fiddling with the battery that way I haven't risked following the wrong advice. I'm sure that you are right that there won't be a problem but I always like to play safe. I can't afford to get caught out and find the battery has gone flat because I've damaged the panel and controller.
We are considering installing a 90 watt solar panel in our new campervan. Do folks think this is worth £600? We want to be able to run the fridge, electric kettle and grill without electric hookup. The fridge lasts for 2 days before you have to recharge the battery.
Even a 700 watt 12 volt kettle would require 58 amps So your kettle and grill would be a no-no
We had a 100 watt panel fitted with controller for £430 so 600 seems a bit dear..
The panel should not be damaged by being exposed without being coupled to a "load"; it will simply go up to a potential of its "open circuit voltage" should the light falling on it be adequate.
I am absolutely sure the makers, retailers and installers don't work in the dark.
Re a 90watt panel, this is way way too lower powered to be used for loads such as kettles unless you have a big bank of batteries and can spend many hours recharging it. These "heating" type loads are far better addressed by using gas. If the fridge is a compressor type you don't have that option but I would be going bigger than 90 Watts solar if seeking true "autonomy" from an EHU and having one of those fridges.
£600 for a 90 Watt system is pricing from 7 or so years back and at todays solar panel retail prices is sheer exploitation. If you can take out the labour element by doing this easy DIY job and are comfortable with buying on the net, a 90 Watt panel should be yours for £100 and a good quality PWM solar controller for £40 ish; some brackets a tube of glue and bit of wire should see you set up for £170 > £180, together with bringing a lot of self satisfaction.