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Author Topic: Newby starting a very small system  (Read 571 times)
newjazzy
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« on: November 19, 2018, 03:37:30 PM »

Hi,
I am looking to install a small system in my woodworking shed to keep the temperature around 6-8C during the winter nightime primarily.
Since retiring from caravaning I have a 8.8a 20w Solar panel, a charge controller and the 110a deep cycle battery.
As thing progress I intend adding another 110a battery and possibly another Solar panel.
My question is, will a Modified Sine Wave inverter of around 3000w peak work with a 500w oil filled electric heater.

I am open to suggestions regarding the setup and size of the equipment. Most of the system would be located in a storage area
adjacent to my workshop with the panel located on the sloping roof which faces almost due south with a clear line of site.

many Thanks. Huh winter
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MeatyFool
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« Reply #1 on: November 19, 2018, 04:35:44 PM »

Newjazzy,

Insulate and make airtight (as best you can) first off - pointless otherwise.

What if the temperature was below 6-8 degrees  for days at a time?

Winter sun is not going to charge batteries to run your radiator for hours on end.  Unless you have far, far more panels much larger than your existing.

Insulate and make airtight might be the best you can hope to achieve.

Meatyfool..
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jonesy
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« Reply #2 on: November 19, 2018, 08:21:18 PM »

Your inverter will run your heater. However, a fully charged battery would power it around 2 hours.
A number of halogen bulbs direct off the battery would provide some heat, more efficiently *, but you'd need impressive levels of insulation for it to make a difference.

*efficiency isn't really the issue here, as the inefficiency is heat, which is what you want. Simply may be a better word.
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1.1kWp PV & SB1700. 7kW log burner.
fourfootfarm
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« Reply #3 on: November 20, 2018, 02:00:39 PM »

For low energy needs heating the person is often a better bet, either with infra red bulbs or heated clothing.

Making the shed airtight as possible will definitely help.

If you need to run the 500w heater and extension lead is a better bet, the solar should manage a few LED bulbs though.
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Outback FM60. EPsolar 30a MPPT and a bunch of Tristar 45's. Hodge Podge of solar ~ 4500w. Various generators and 1000ah 24v forklift battery.

Turkish Turnip
gnarly
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« Reply #4 on: November 20, 2018, 06:00:20 PM »

Small air to air heat pump for a few hundred pounds ?  Would work well, especially if you dont expect to use it during freezing weather.  The ones with R32 refrigerant are more eco friendly
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